From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B186C001DC for ; Mon, 17 Jul 2023 14:14:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232149AbjGQOO4 (ORCPT ); Mon, 17 Jul 2023 10:14:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232139AbjGQOOw (ORCPT ); Mon, 17 Jul 2023 10:14:52 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2EBE01A2 for ; Mon, 17 Jul 2023 07:14:46 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id A4BF16607014; Mon, 17 Jul 2023 15:14:43 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603284; bh=9oUBdhJxcjM5c8eCCSSOcqllo9ke9sPNjeRntNkLNoM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TeYzdmgz451EjrdZo/zdtYmOyZJdAqLoIhaELRWmIqur4GlMcs3zKmEo90E72X8Ty 3HVRCAt2HIi3mYzFGcG808hwhyH2r3PVBb78RQ8gRjoOzHlNdFReAc1xMiudCTe3ph 1tFbXQLW3OpziaEM8CIatOvs/QJerwnhFza1tA4RtdQ9cc/yOA621C+xxGk7ztRUpe /wYMEc7oK6M0TRiPp8Bk2ds0C7RBLmpaGKd/iC0iFjt/KsJvWCG+ugSc8g4P3wNo6d u5vQfYYh7hc3HDfWv53eyb+5WwQzF+Km0k0CZZaaoZncB246/sYKB8FAvAYiqRc8+k mCnkzDomm7B4Q== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 01/11] drm/mediatek: dp: Add missing error checks in mtk_dp_parse_capabilities Date: Mon, 17 Jul 2023 16:14:28 +0200 Message-Id: <20230717141438.274419-2-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" If reading the RX capabilities fails the training pattern will be set wrongly: add error checking for drm_dp_read_dpcd_caps() and return if anything went wrong with it. While at it, also add a less critical error check when writing to clear the ESI0 IRQ vector. Fixes: f70ac097a2cf ("drm/mediatek: Add MT8195 Embedded DisplayPort driver") Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Alexandre Mergnat Tested-by: Chen-Yu Tsai --- drivers/gpu/drm/mediatek/mtk_dp.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index 64eee77452c0..c58b775877a3 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1588,7 +1588,9 @@ static int mtk_dp_parse_capabilities(struct mtk_dp *m= tk_dp) u8 val; ssize_t ret; =20 - drm_dp_read_dpcd_caps(&mtk_dp->aux, mtk_dp->rx_cap); + ret =3D drm_dp_read_dpcd_caps(&mtk_dp->aux, mtk_dp->rx_cap); + if (ret < 0) + return ret; =20 if (drm_dp_tps4_supported(mtk_dp->rx_cap)) mtk_dp->train_info.channel_eq_pattern =3D DP_TRAINING_PATTERN_4; @@ -1615,10 +1617,13 @@ static int mtk_dp_parse_capabilities(struct mtk_dp = *mtk_dp) return ret =3D=3D 0 ? -EIO : ret; } =20 - if (val) - drm_dp_dpcd_writeb(&mtk_dp->aux, - DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0, - val); + if (val) { + ret =3D drm_dp_dpcd_writeb(&mtk_dp->aux, + DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0, + val); + if (ret < 0) + return ret; + } } =20 return 0; --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB740C001DC for ; Mon, 17 Jul 2023 14:15:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232181AbjGQOPC (ORCPT ); Mon, 17 Jul 2023 10:15:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232088AbjGQOOw (ORCPT ); Mon, 17 Jul 2023 10:14:52 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6EF96E52 for ; Mon, 17 Jul 2023 07:14:46 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id 83D0A660701C; Mon, 17 Jul 2023 15:14:44 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603285; bh=Tr3orzOYDdkQGSYDctxq9UCgUZnNKjA4Jv1f4ePhHyw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AAlzN98F7xO+Rtfr+7t6XCh2o7uQEWNaBW+SDM2sC8CTiLUEkNWrWetY5H79XzYcd 09yQ2wjXCSFiipcvxowwky6CwLi+/Njp2lJMzAywsiqgwLL/5H4nJskgOTOzgAvMZZ HlQQzrwz8078V5L1rtvUdkyIs4zCDHG7ILgV+WsGdNWaoXoyiO5Vb/o4tQzkLeDMfm nBgsOxz3/iXRqwyQ/CxTxZLN391gxLYNENaBTUX95TnnWuOIMCCetxkR/ZX78DAIS5 p3JB9abSLITqZLXN42+O5W02q/yWPwXrnfBNw/uzG+1/8TwC/Xj33+Jgn0QC/jQ+Eh g5XO5YEpAFgoQ== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 02/11] drm/mediatek: dp: Move AUX and panel poweron/off sequence to function Date: Mon, 17 Jul 2023 16:14:29 +0200 Message-Id: <20230717141438.274419-3-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Everytime we run bridge detection and/or EDID read we run a poweron and poweroff sequence for both the AUX and the panel; moreover, this is also done when enabling the bridge in the .atomic_enable() callback. Move this power on/off sequence to a new mtk_dp_aux_panel_poweron() function as to commonize it. Note that, before this commit, in mtk_dp_bridge_atomic_enable() only the AUX was getting powered on but the panel was left powered off if the DP cable wasn't plugged in while now we unconditionally send a D0 request and this is done for two reasons: - First, whether this request fails or not, it takes the same time and anyway the DP hardware won't produce any error (or, if it does, it's ignorable because it won't block further commands) - Second, training the link between a sleeping/standby/unpowered display makes little sense. Signed-off-by: AngeloGioacchino Del Regno Tested-by: Chen-Yu Tsai Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_dp.c | 76 ++++++++++++------------------- 1 file changed, 30 insertions(+), 46 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index c58b775877a3..77da0d002e9f 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1251,6 +1251,29 @@ static void mtk_dp_audio_mute(struct mtk_dp *mtk_dp,= bool mute) val[2], AU_TS_CFG_DP_ENC0_P0_MASK); } =20 +static void mtk_dp_aux_panel_poweron(struct mtk_dp *mtk_dp, bool pwron) +{ + if (pwron) { + /* power on aux */ + mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, + DP_PWR_STATE_BANDGAP_TPLL_LANE, + DP_PWR_STATE_MASK); + + /* power on panel */ + drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0); + usleep_range(2000, 5000); + } else { + /* power off panel */ + drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3); + usleep_range(2000, 3000); + + /* power off aux */ + mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, + DP_PWR_STATE_BANDGAP_TPLL, + DP_PWR_STATE_MASK); + } +} + static void mtk_dp_power_enable(struct mtk_dp *mtk_dp) { mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE, @@ -1941,16 +1964,9 @@ static enum drm_connector_status mtk_dp_bdg_detect(s= truct drm_bridge *bridge) if (!mtk_dp->train_info.cable_plugged_in) return ret; =20 - if (!enabled) { - /* power on aux */ - mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, - DP_PWR_STATE_BANDGAP_TPLL_LANE, - DP_PWR_STATE_MASK); + if (!enabled) + mtk_dp_aux_panel_poweron(mtk_dp, true); =20 - /* power on panel */ - drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0); - usleep_range(2000, 5000); - } /* * Some dongles still source HPD when they do not connect to any * sink device. To avoid this, we need to read the sink count @@ -1962,16 +1978,8 @@ static enum drm_connector_status mtk_dp_bdg_detect(s= truct drm_bridge *bridge) if (DP_GET_SINK_COUNT(sink_count)) ret =3D connector_status_connected; =20 - if (!enabled) { - /* power off panel */ - drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3); - usleep_range(2000, 3000); - - /* power off aux */ - mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, - DP_PWR_STATE_BANDGAP_TPLL, - DP_PWR_STATE_MASK); - } + if (!enabled) + mtk_dp_aux_panel_poweron(mtk_dp, false); =20 return ret; } @@ -1987,15 +1995,7 @@ static struct edid *mtk_dp_get_edid(struct drm_bridg= e *bridge, =20 if (!enabled) { drm_atomic_bridge_chain_pre_enable(bridge, connector->state->state); - - /* power on aux */ - mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, - DP_PWR_STATE_BANDGAP_TPLL_LANE, - DP_PWR_STATE_MASK); - - /* power on panel */ - drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0); - usleep_range(2000, 5000); + mtk_dp_aux_panel_poweron(mtk_dp, true); } =20 new_edid =3D drm_get_edid(connector, &mtk_dp->aux.ddc); @@ -2015,15 +2015,7 @@ static struct edid *mtk_dp_get_edid(struct drm_bridg= e *bridge, } =20 if (!enabled) { - /* power off panel */ - drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3); - usleep_range(2000, 3000); - - /* power off aux */ - mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, - DP_PWR_STATE_BANDGAP_TPLL, - DP_PWR_STATE_MASK); - + mtk_dp_aux_panel_poweron(mtk_dp, false); drm_atomic_bridge_chain_post_disable(bridge, connector->state->state); } =20 @@ -2183,15 +2175,7 @@ static void mtk_dp_bridge_atomic_enable(struct drm_b= ridge *bridge, return; } =20 - /* power on aux */ - mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, - DP_PWR_STATE_BANDGAP_TPLL_LANE, - DP_PWR_STATE_MASK); - - if (mtk_dp->train_info.cable_plugged_in) { - drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0); - usleep_range(2000, 5000); - } + mtk_dp_aux_panel_poweron(mtk_dp, true); =20 /* Training */ ret =3D mtk_dp_training(mtk_dp); --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BA571C001B0 for ; Mon, 17 Jul 2023 14:15:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232193AbjGQOPE (ORCPT ); Mon, 17 Jul 2023 10:15:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42284 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232152AbjGQOOw (ORCPT ); Mon, 17 Jul 2023 10:14:52 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 430F410D7 for ; Mon, 17 Jul 2023 07:14:47 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id 61AB86607065; Mon, 17 Jul 2023 15:14:45 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603286; bh=kKU4HTE/J0aKcQTNyeW8JikkjhCBaQvDbF5Kxj8x8Ac=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V9dF57QcRiObKK67hOr4s5T5zw3R5AYW2tB0g1jsSSlvILbDFACdFMQEK84l/5Hd9 w03KHbK18/q7dUuu6Lz0QCOsCxrUU78SvI9drbtUBjPW0YjbvuuNsBl+Mpsvdlj38E YEZdiQDeMTzBhozuYzzl/lBbGGvJLWqcyJRNh0Gz+CE5pHJf6ac/v5zMTRR8gp35MV AzzprVD9plVViIjRD8nK9xbRTD2z6Z5m6BF9x7wFINyGmNQtWpxfeNWGSi1tAFbeJc lT2gdCF+4hSYFlxps/1lAZTw6wiHZtS8YN5PhdKJSb1P18ONQlwoBjRM+BLZ6xIb/u ZkKz6xLUdwS5A== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 03/11] drm/mediatek: dp: Change logging to dev for mtk_dp_aux_transfer() Date: Mon, 17 Jul 2023 16:14:30 +0200 Message-Id: <20230717141438.274419-4-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Change logging from drm_{err,info}() to dev_{err,info}() in functions mtk_dp_aux_transfer() and mtk_dp_aux_do_transfer(): this will be essential to avoid getting NULL pointer kernel panics if any kind of error happens during AUX transfers happening before the bridge is attached. This may potentially start happening in a later commit implementing aux-bus support, as AUX transfers will be triggered from the panel driver (for EDID) before the mtk-dp bridge gets attached, and it's done in preparation for the same. Signed-off-by: AngeloGioacchino Del Regno Tested-by: Chen-Yu Tsai Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_dp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index 77da0d002e9f..98f63d8230e4 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -847,7 +847,7 @@ static int mtk_dp_aux_do_transfer(struct mtk_dp *mtk_dp= , bool is_read, u8 cmd, u32 phy_status =3D mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3628) & AUX_RX_PHY_STATE_AUX_TX_P0_MASK; if (phy_status !=3D AUX_RX_PHY_STATE_AUX_TX_P0_RX_IDLE) { - drm_err(mtk_dp->drm_dev, + dev_err(mtk_dp->dev, "AUX Rx Aux hang, need SW reset\n"); return -EIO; } @@ -2054,7 +2054,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux = *mtk_aux, is_read =3D true; break; default: - drm_err(mtk_aux->drm_dev, "invalid aux cmd =3D %d\n", + dev_err(mtk_dp->dev, "invalid aux cmd =3D %d\n", msg->request); ret =3D -EINVAL; goto err; @@ -2070,7 +2070,7 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux = *mtk_aux, to_access, &msg->reply); =20 if (ret) { - drm_info(mtk_dp->drm_dev, + dev_info(mtk_dp->dev, "Failed to do AUX transfer: %d\n", ret); goto err; } --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25B62EB64DC for ; Mon, 17 Jul 2023 14:15:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230502AbjGQOPL (ORCPT ); Mon, 17 Jul 2023 10:15:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42296 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229973AbjGQOOx (ORCPT ); Mon, 17 Jul 2023 10:14:53 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3412110DC for ; Mon, 17 Jul 2023 07:14:48 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id 40955660704F; Mon, 17 Jul 2023 15:14:46 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603286; bh=/3/hDApoGip9KgA24giYtGjKuPsuwiHLKhNDIhX3IrA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TEAZ+Mw7aQDJ7EeFlCX9PUS94xqJLzlpVs3cPoOIoS/zjxMAJY44dohP0ujdT1wtF cocicOiXL69l3rb/iK//af7ANn30ryGnRJ0L6Y/OGL5cPhVroEX58SfPQWKInoP/lU cOiYE/KbSHhFr59Wuwvi7t/P1CeodDkHqb7r2VrExMRdqflGAHqK1UcjF2PffmhSIp 429P/EPA5eHmL5qvZScN9EVQrIKggg6BVdSqLzzvQJUtsjQMbNKK8DbqS5oJ/ip43P a/YgdhmB2VpPcWFTLo4NyMHjhOHhyU1LUzoG8gg1CPBJzCtlZnk89nzBIWn8kvB/Ub /k0acbDf4KIDA== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 04/11] drm/mediatek: dp: Use devm variant of drm_bridge_add() Date: Mon, 17 Jul 2023 16:14:31 +0200 Message-Id: <20230717141438.274419-5-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In preparation for adding support for aux-bus, which will add a code path that may fail after the drm_bridge_add() call, change that to devm_drm_bridge_add() to simplify failure paths later. Signed-off-by: AngeloGioacchino Del Regno Tested-by: Chen-Yu Tsai Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_dp.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index 98f63d8230e4..fc6cabf5370b 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2552,7 +2552,9 @@ static int mtk_dp_probe(struct platform_device *pdev) DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD; mtk_dp->bridge.type =3D mtk_dp->data->bridge_type; =20 - drm_bridge_add(&mtk_dp->bridge); + ret =3D devm_drm_bridge_add(dev, &mtk_dp->bridge); + if (ret) + return dev_err_probe(dev, ret, "Failed to add bridge\n"); =20 mtk_dp->need_debounce =3D true; timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0); @@ -2570,7 +2572,6 @@ static int mtk_dp_remove(struct platform_device *pdev) pm_runtime_put(&pdev->dev); pm_runtime_disable(&pdev->dev); del_timer_sync(&mtk_dp->debounce_timer); - drm_bridge_remove(&mtk_dp->bridge); platform_device_unregister(mtk_dp->phy_dev); if (mtk_dp->audio_pdev) platform_device_unregister(mtk_dp->audio_pdev); --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9F8A3C001DC for ; Mon, 17 Jul 2023 14:15:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232221AbjGQOPN (ORCPT ); Mon, 17 Jul 2023 10:15:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42268 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232158AbjGQOOy (ORCPT ); Mon, 17 Jul 2023 10:14:54 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1727110E5 for ; Mon, 17 Jul 2023 07:14:50 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id 1C390660706A; Mon, 17 Jul 2023 15:14:47 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603287; bh=oE5YAf+utdPTlLY63c7r2iNr+10OnbyI0GxncK+n2RY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fxXAZXtSJMQ3LB5hyprU/fagV1Y/xn5asEzmbCGV3QvHbCJIOrDHtnTxGSGJCIEHt TfUWpTFZtdXENyjnp+8E7Ulgg1yS0ln/v6Gz2b4p5O65dYC3/Ge+bTxEhAKkmO2yoc QDlv0BCiWxSphHKOUvW6v4dD33SZGPEHRmm+MIRE2wQknISfTjmzw8DZdLyZnPbe0l kw7kVVFXJg+QdmUvkFPngvHmdCfTjcfGsD/ahTF8ZaScUZvtaSZafTR0y7E4h2Ue8D mY4f9NosEjaiB04elBivDCsSsGtY3a3xLrqMGmD8QNq2VUqvUvlKRC50uCxr0L9jBv CpVtzLIzWF9NA== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 05/11] drm/mediatek: dp: Move AUX_P0 setting to mtk_dp_initialize_aux_settings() Date: Mon, 17 Jul 2023 16:14:32 +0200 Message-Id: <20230717141438.274419-6-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Move the register write to MTK_DP_AUX_P0_3690 to set the AUX reply mode to function mtk_dp_initialize_aux_settings(), as this is effectively part of the DPTX AUX setup sequence. Signed-off-by: AngeloGioacchino Del Regno Tested-by: Chen-Yu Tsai Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_dp.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index fc6cabf5370b..e8d3bf310608 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1009,6 +1009,11 @@ static void mtk_dp_initialize_aux_settings(struct mt= k_dp *mtk_dp) mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_37C8, MTK_ATOP_EN_AUX_TX_P0, MTK_ATOP_EN_AUX_TX_P0); + + /* Set complete reply mode for AUX */ + mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3690, + RX_REPLY_COMPLETE_MODE_AUX_TX_P0, + RX_REPLY_COMPLETE_MODE_AUX_TX_P0); } =20 static void mtk_dp_initialize_digital_settings(struct mtk_dp *mtk_dp) @@ -1826,10 +1831,6 @@ static void mtk_dp_init_port(struct mtk_dp *mtk_dp) mtk_dp_initialize_settings(mtk_dp); mtk_dp_initialize_aux_settings(mtk_dp); mtk_dp_initialize_digital_settings(mtk_dp); - - mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3690, - RX_REPLY_COMPLETE_MODE_AUX_TX_P0, - RX_REPLY_COMPLETE_MODE_AUX_TX_P0); mtk_dp_initialize_hpd_detect_settings(mtk_dp); =20 mtk_dp_digital_sw_reset(mtk_dp); --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 394D0C001B0 for ; Mon, 17 Jul 2023 14:15:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229718AbjGQOPI (ORCPT ); Mon, 17 Jul 2023 10:15:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42270 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232157AbjGQOOy (ORCPT ); Mon, 17 Jul 2023 10:14:54 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 16CB110E4 for ; Mon, 17 Jul 2023 07:14:50 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id EDBED660706B; Mon, 17 Jul 2023 15:14:47 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603288; bh=vi70p/9FDUxG9+dFVjjeS3h5x0OhHX3G4+djzfe2T7g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EbTkkR0teiWcw05LFQieNjl2W+VC/k26E+DX+Uuw516A3SmmB8jrr1KMI9BSkRmJu BVEcecpOr1DrWMN0kAuwb4U1QwWZfwWAP8iyW43mjFJNe36cmWPj+hZZ8mMGb12sQt Z0aXTsg7mpwvo25MEwhACay3IXEKEY4pMti1nm9qoM/Z4pGs2CPMOmkXjvgxI3mxq+ XEBoO5LqDH3xShkuKrtXQc99Mzjj8JP6K9YFLBWDTc7pAF0QKuqYFEbvDA2GAkXDaU hBp/keqJV8TBZAfLI0ZMzETOjKUlk8jrEjKqFQpLr5Wy/SJqpWO+CvzSo6SBJzbPg7 wq1K4WxwsbkNg== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 06/11] drm/mediatek: dp: Enable event interrupt only when bridge attached Date: Mon, 17 Jul 2023 16:14:33 +0200 Message-Id: <20230717141438.274419-7-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" It is useless and error-prone to enable the DisplayPort event interrupt before finishing to probe and install the driver, as the DP training cannot happen before the entire pipeline is correctly set up, as the interrupt handler also requires the full hardware to be initialized by mtk_dp_bridge_attach(). Anyway, depending in which state the controller is left from the bootloader, this may cause an interrupt storm and consequently hang the kernel during boot, so, avoid enabling the interrupt until we reach a clean state by adding the IRQ_NOAUTOEN flag before requesting it at probe time and manage the enablement of the ISR in the .attach() and .detach() handlers for the DP bridge. Signed-off-by: AngeloGioacchino Del Regno Tested-by: Chen-Yu Tsai Reviewed-by: Alexandre Mergnat --- drivers/gpu/drm/mediatek/mtk_dp.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index e8d3bf310608..83e55f8dc84a 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -100,6 +100,7 @@ struct mtk_dp_efuse_fmt { struct mtk_dp { bool enabled; bool need_debounce; + int irq; u8 max_lanes; u8 max_linkrate; u8 rx_cap[DP_RECEIVER_CAP_SIZE]; @@ -2141,6 +2142,8 @@ static int mtk_dp_bridge_attach(struct drm_bridge *br= idge, =20 mtk_dp->drm_dev =3D bridge->dev; =20 + irq_clear_status_flags(mtk_dp->irq, IRQ_NOAUTOEN); + enable_irq(mtk_dp->irq); mtk_dp_hwirq_enable(mtk_dp, true); =20 return 0; @@ -2157,6 +2160,7 @@ static void mtk_dp_bridge_detach(struct drm_bridge *b= ridge) struct mtk_dp *mtk_dp =3D mtk_dp_from_bridge(bridge); =20 mtk_dp_hwirq_enable(mtk_dp, false); + disable_irq(mtk_dp->irq); mtk_dp->drm_dev =3D NULL; mtk_dp_poweroff(mtk_dp); drm_dp_aux_unregister(&mtk_dp->aux); @@ -2475,7 +2479,7 @@ static int mtk_dp_probe(struct platform_device *pdev) { struct mtk_dp *mtk_dp; struct device *dev =3D &pdev->dev; - int ret, irq_num; + int ret; =20 mtk_dp =3D devm_kzalloc(dev, sizeof(*mtk_dp), GFP_KERNEL); if (!mtk_dp) @@ -2484,9 +2488,9 @@ static int mtk_dp_probe(struct platform_device *pdev) mtk_dp->dev =3D dev; mtk_dp->data =3D (struct mtk_dp_data *)of_device_get_match_data(dev); =20 - irq_num =3D platform_get_irq(pdev, 0); - if (irq_num < 0) - return dev_err_probe(dev, irq_num, + mtk_dp->irq =3D platform_get_irq(pdev, 0); + if (mtk_dp->irq < 0) + return dev_err_probe(dev, mtk_dp->irq, "failed to request dp irq resource\n"); =20 mtk_dp->next_bridge =3D devm_drm_of_get_bridge(dev, dev->of_node, 1, 0); @@ -2507,7 +2511,8 @@ static int mtk_dp_probe(struct platform_device *pdev) =20 spin_lock_init(&mtk_dp->irq_thread_lock); =20 - ret =3D devm_request_threaded_irq(dev, irq_num, mtk_dp_hpd_event, + irq_set_status_flags(mtk_dp->irq, IRQ_NOAUTOEN); + ret =3D devm_request_threaded_irq(dev, mtk_dp->irq, mtk_dp_hpd_event, mtk_dp_hpd_event_thread, IRQ_TYPE_LEVEL_HIGH, dev_name(dev), mtk_dp); --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC3C9C001B0 for ; Mon, 17 Jul 2023 14:15:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232226AbjGQOPP (ORCPT ); Mon, 17 Jul 2023 10:15:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232112AbjGQOOz (ORCPT ); Mon, 17 Jul 2023 10:14:55 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FA4810F1 for ; Mon, 17 Jul 2023 07:14:51 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id CCCD5660706D; Mon, 17 Jul 2023 15:14:48 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603289; bh=CefhFqQ/uXdHAnQ63I1hQJ7LyexCUl3QyjqRS2AFcCA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AK4xXbN33T2/2nMWz2vsx9EJjM6mHcA2ztaFJcKg0UWMS1zcZoQV6NAURVx5D7+zx xMePh/F61DvLmxQjqAvz5kIDFwtRsvj9ZOv3FS3XaAfdjopyE2dNKbwKYf+znv9TxA tmOKJWMVAvgenCdvRRAgO+CFWvc1pjiFhZCmWSIclWe7BBsyps67eV/bnBwi7EGu0/ geiKRDPPE9sdD2UKYJPHtDIZtXj6oj7Kimy6XpkvwRDqK2yE01oj4GjhZZ7ZJlZMR9 aZregpCBwM2QekulpgNx6+k5dvY8Ov4oGdYWcMNlWb9yryyYBsC90ZxXfl3R2Y0PB5 ApKCB2TeqVGJQ== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 07/11] drm/mediatek: dp: Avoid mutex locks if audio is not supported/enabled Date: Mon, 17 Jul 2023 16:14:34 +0200 Message-Id: <20230717141438.274419-8-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" If a controller (usually, eDP!) does not support audio, or audio is not enabled because the endpoint has no audio support, it's useless to lock a mutex only to unlock it right after because there's no .plugged_cb(). Check if the audio is supported and enabled before locking the mutex in mtk_dp_update_plugged_status(): if not, we simply return immediately. While at it, since the update_plugged_status_lock mutex would not be used if the controller doesn't support audio at all, initialize it only if `audio_supported` is true. Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu Tested-by: Chen-Yu Tsai --- drivers/gpu/drm/mediatek/mtk_dp.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index 83e55f8dc84a..c1d1a882f1db 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1948,6 +1948,9 @@ static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp, =20 static void mtk_dp_update_plugged_status(struct mtk_dp *mtk_dp) { + if (!mtk_dp->data->audio_supported || !mtk_dp->audio_enable) + return; + mutex_lock(&mtk_dp->update_plugged_status_lock); if (mtk_dp->plugged_cb && mtk_dp->codec_dev) mtk_dp->plugged_cb(mtk_dp->codec_dev, @@ -2520,11 +2523,11 @@ static int mtk_dp_probe(struct platform_device *pde= v) return dev_err_probe(dev, ret, "failed to request mediatek dptx irq\n"); =20 - mutex_init(&mtk_dp->update_plugged_status_lock); - platform_set_drvdata(pdev, mtk_dp); =20 if (mtk_dp->data->audio_supported) { + mutex_init(&mtk_dp->update_plugged_status_lock); + ret =3D mtk_dp_register_audio_driver(dev); if (ret) { dev_err(dev, "Failed to register audio driver: %d\n", --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7CFCDEB64DC for ; Mon, 17 Jul 2023 14:15:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232237AbjGQOPS (ORCPT ); Mon, 17 Jul 2023 10:15:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232144AbjGQOOz (ORCPT ); Mon, 17 Jul 2023 10:14:55 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7E64A19A for ; Mon, 17 Jul 2023 07:14:51 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id A74AA660706F; Mon, 17 Jul 2023 15:14:49 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603290; bh=MTYqTiXP+9VBPluWnDbRM5Aq8M+c0b3eKDaIxQE6YVQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dCT0de41LveyRkV8kQF7wB58+3bsMLnhgZTbfJJMh8+st92dT/EX6fAaz2ifNhi/A vp5xffRe0vxRDJAgmmFwkRCddVC0gYz7L5PudUeozMQmxnxZ+oZWC5F2kRejclH6Hu +7w38gRXU3aZAsAOspKlFSPkRoNZ43QL3zAvJn0cNrww6c2uLAemAehf40VMixwCDJ nErJeZERhU0uW0PIM7OC5xLLNf6a86DCFYcXSomvEKcyLYinb1IvW3hY5QZ738NsEB FCQPvCqEV/WNBwXByaD3crhe04KlSshSPjiVnTzgf5igl/d2jTpA8WzQ22Jo4PQ0tJ EYMFQuFiUK0Yw== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 08/11] drm/mediatek: dp: Move PHY registration to new function Date: Mon, 17 Jul 2023 16:14:35 +0200 Message-Id: <20230717141438.274419-9-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In preparation for adding support for eDP, move the PHY registration code to a new mtk_dp_register_phy() function for better readability. This commit brings no functional changes. Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Alexandre Mergnat Tested-by: Chen-Yu Tsai --- drivers/gpu/drm/mediatek/mtk_dp.c | 43 +++++++++++++++++++------------ 1 file changed, 26 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index c1d1a882f1db..1b4219e6a00b 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2478,6 +2478,29 @@ static int mtk_dp_register_audio_driver(struct devic= e *dev) return PTR_ERR_OR_ZERO(mtk_dp->audio_pdev); } =20 +static int mtk_dp_register_phy(struct mtk_dp *mtk_dp) +{ + struct device *dev =3D mtk_dp->dev; + + mtk_dp->phy_dev =3D platform_device_register_data(dev, "mediatek-dp-phy", + PLATFORM_DEVID_AUTO, + &mtk_dp->regs, + sizeof(struct regmap *)); + if (IS_ERR(mtk_dp->phy_dev)) + return dev_err_probe(dev, PTR_ERR(mtk_dp->phy_dev), + "Failed to create device mediatek-dp-phy\n"); + + mtk_dp_get_calibration_data(mtk_dp); + + mtk_dp->phy =3D devm_phy_get(&mtk_dp->phy_dev->dev, "dp"); + if (IS_ERR(mtk_dp->phy)) { + platform_device_unregister(mtk_dp->phy_dev); + return dev_err_probe(dev, PTR_ERR(mtk_dp->phy), "Failed to get phy\n"); + } + + return 0; +} + static int mtk_dp_probe(struct platform_device *pdev) { struct mtk_dp *mtk_dp; @@ -2536,23 +2559,9 @@ static int mtk_dp_probe(struct platform_device *pdev) } } =20 - mtk_dp->phy_dev =3D platform_device_register_data(dev, "mediatek-dp-phy", - PLATFORM_DEVID_AUTO, - &mtk_dp->regs, - sizeof(struct regmap *)); - if (IS_ERR(mtk_dp->phy_dev)) - return dev_err_probe(dev, PTR_ERR(mtk_dp->phy_dev), - "Failed to create device mediatek-dp-phy\n"); - - mtk_dp_get_calibration_data(mtk_dp); - - mtk_dp->phy =3D devm_phy_get(&mtk_dp->phy_dev->dev, "dp"); - - if (IS_ERR(mtk_dp->phy)) { - platform_device_unregister(mtk_dp->phy_dev); - return dev_err_probe(dev, PTR_ERR(mtk_dp->phy), - "Failed to get phy\n"); - } + ret =3D mtk_dp_register_phy(mtk_dp); + if (ret) + return ret; =20 mtk_dp->bridge.funcs =3D &mtk_dp_bridge_funcs; mtk_dp->bridge.of_node =3D dev->of_node; --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2D937C001B0 for ; Mon, 17 Jul 2023 14:15:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232248AbjGQOPY (ORCPT ); Mon, 17 Jul 2023 10:15:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42262 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232160AbjGQOO4 (ORCPT ); Mon, 17 Jul 2023 10:14:56 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C89EAF7 for ; Mon, 17 Jul 2023 07:14:52 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id 8363A6607071; Mon, 17 Jul 2023 15:14:50 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603291; bh=jf7ly6xH04o4w4wKu1Ls3wp4+T9ztA3FEMOCyHRd1vU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GqPZ4Ci1hQkp6b08Wxr6wAh3WnaWUyGxp1Dtpz9Q2fn8jiMUxGl4PEsuEYRljZMZb z7U3QaOwUE/qVYB7/WYQTlKoVNhYyn3DT6gS0PmMGT9qSFY06fV0RVtdtEAOVt8veo 6NLapybuWIiwSgwRz1d46Wly2oyrp8dE07XeMd2U5XM7Mx9zAaT5axpj9t7PWMsrlg y0y9GEnFbsIoipTseTDb54AF8ImCF/Hz/GqRPVBKddsqjMdtFr84BXJleyrRv4beRX 6ZB6J7P8lWoEky5/3ik0SDck0G1OIl6y7b6nKuuekx2okFNj3TydzPrsb7bhSQ8pe6 UlykQZ38XHqRg== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 09/11] drm/mediatek: dp: Add support for embedded DisplayPort aux-bus Date: Mon, 17 Jul 2023 16:14:36 +0200 Message-Id: <20230717141438.274419-10-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" For the eDP case we can support using aux-bus on MediaTek DP: this gives us the possibility to declare our panel as generic "panel-edp" which will automatically configure the timings and available modes via the EDID that we read from it. To do this, move the panel parsing at the end of the probe function so that the hardware is initialized beforehand and also initialize the DPTX AUX block and power both on as, when we populate the aux-bus, the panel driver will trigger an EDID read to perform panel detection. Last but not least, since now the AUX transfers can happen in the separated aux-bus, it was necessary to add an exclusion for the cable_plugged_in check in `mtk_dp_aux_transfer()` and the easiest way to do this is to simply ignore checking that when the bridge type is eDP. Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu Tested-by: Chen-Yu Tsai --- drivers/gpu/drm/mediatek/Kconfig | 1 + drivers/gpu/drm/mediatek/mtk_dp.c | 84 ++++++++++++++++++++++++++++--- 2 files changed, 79 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/mediatek/Kconfig b/drivers/gpu/drm/mediatek/Kc= onfig index b451dee64d34..76cab28e010c 100644 --- a/drivers/gpu/drm/mediatek/Kconfig +++ b/drivers/gpu/drm/mediatek/Kconfig @@ -26,6 +26,7 @@ config DRM_MEDIATEK_DP select PHY_MTK_DP select DRM_DISPLAY_HELPER select DRM_DISPLAY_DP_HELPER + select DRM_DP_AUX_BUS help DRM/KMS Display Port driver for MediaTek SoCs. =20 diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index 1b4219e6a00b..acdd457b5449 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -4,6 +4,7 @@ * Copyright (c) 2022 BayLibre */ =20 +#include #include #include #include @@ -1313,9 +1314,11 @@ static void mtk_dp_power_disable(struct mtk_dp *mtk_= dp) =20 static void mtk_dp_initialize_priv_data(struct mtk_dp *mtk_dp) { + bool plugged_in =3D (mtk_dp->bridge.type =3D=3D DRM_MODE_CONNECTOR_eDP); + mtk_dp->train_info.link_rate =3D DP_LINK_BW_5_4; mtk_dp->train_info.lane_count =3D mtk_dp->max_lanes; - mtk_dp->train_info.cable_plugged_in =3D false; + mtk_dp->train_info.cable_plugged_in =3D plugged_in; =20 mtk_dp->info.format =3D DP_PIXELFORMAT_RGB; memset(&mtk_dp->info.vm, 0, sizeof(struct videomode)); @@ -1617,6 +1620,16 @@ static int mtk_dp_parse_capabilities(struct mtk_dp *= mtk_dp) u8 val; ssize_t ret; =20 + /* + * If we're eDP and capabilities were already parsed we can skip + * reading again because eDP panels aren't hotpluggable hence the + * caps and training information won't ever change in a boot life + */ + if (mtk_dp->bridge.type =3D=3D DRM_MODE_CONNECTOR_eDP && + mtk_dp->rx_cap[DP_MAX_LINK_RATE] && + mtk_dp->train_info.sink_ssc) + return 0; + ret =3D drm_dp_read_dpcd_caps(&mtk_dp->aux, mtk_dp->rx_cap); if (ret < 0) return ret; @@ -2030,15 +2043,14 @@ static struct edid *mtk_dp_get_edid(struct drm_brid= ge *bridge, static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux, struct drm_dp_aux_msg *msg) { - struct mtk_dp *mtk_dp; + struct mtk_dp *mtk_dp =3D container_of(mtk_aux, struct mtk_dp, aux); bool is_read; u8 request; size_t accessed_bytes =3D 0; int ret; =20 - mtk_dp =3D container_of(mtk_aux, struct mtk_dp, aux); - - if (!mtk_dp->train_info.cable_plugged_in) { + if (mtk_dp->bridge.type !=3D DRM_MODE_CONNECTOR_eDP && + !mtk_dp->train_info.cable_plugged_in) { ret =3D -EAGAIN; goto err; } @@ -2501,6 +2513,28 @@ static int mtk_dp_register_phy(struct mtk_dp *mtk_dp) return 0; } =20 +static int mtk_dp_edp_link_panel(struct drm_dp_aux *mtk_aux) +{ + struct mtk_dp *mtk_dp =3D container_of(mtk_aux, struct mtk_dp, aux); + struct device *dev =3D mtk_aux->dev; + int ret; + + mtk_dp->next_bridge =3D devm_drm_of_get_bridge(dev, dev->of_node, 1, 0); + + /* Power off the DP and AUX: either detection is done, or no panel presen= t */ + mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, + DP_PWR_STATE_BANDGAP_TPLL, + DP_PWR_STATE_MASK); + mtk_dp_power_disable(mtk_dp); + + if (IS_ERR(mtk_dp->next_bridge)) { + ret =3D PTR_ERR(mtk_dp->next_bridge); + mtk_dp->next_bridge =3D NULL; + return ret; + } + return 0; +} + static int mtk_dp_probe(struct platform_device *pdev) { struct mtk_dp *mtk_dp; @@ -2531,9 +2565,10 @@ static int mtk_dp_probe(struct platform_device *pdev) if (ret) return dev_err_probe(dev, ret, "Failed to parse dt\n"); =20 - drm_dp_aux_init(&mtk_dp->aux); mtk_dp->aux.name =3D "aux_mtk_dp"; + mtk_dp->aux.dev =3D dev; mtk_dp->aux.transfer =3D mtk_dp_aux_transfer; + drm_dp_aux_init(&mtk_dp->aux); =20 spin_lock_init(&mtk_dp->irq_thread_lock); =20 @@ -2577,6 +2612,43 @@ static int mtk_dp_probe(struct platform_device *pdev) mtk_dp->need_debounce =3D true; timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0); =20 + if (mtk_dp->bridge.type =3D=3D DRM_MODE_CONNECTOR_eDP) { + /* + * Set the data lanes to idle in case the bootloader didn't + * properly close the eDP port to avoid stalls and then + * reinitialize, reset and power on the AUX block. + */ + mtk_dp_set_idle_pattern(mtk_dp, true); + mtk_dp_initialize_aux_settings(mtk_dp); + mtk_dp_power_enable(mtk_dp); + + /* + * Power on the AUX to allow reading the EDID from aux-bus: + * please note that it is necessary to call power off in the + * .done_probing() callback (mtk_dp_edp_link_panel), as only + * there we can safely assume that we finished reading EDID. + */ + mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, + DP_PWR_STATE_BANDGAP_TPLL_LANE, + DP_PWR_STATE_MASK); + + ret =3D devm_of_dp_aux_populate_bus(&mtk_dp->aux, mtk_dp_edp_link_panel); + if (ret) { + /* -ENODEV this means that the panel is not on the aux-bus */ + if (ret =3D=3D -ENODEV) { + ret =3D mtk_dp_edp_link_panel(&mtk_dp->aux); + if (ret) + return ret; + } else { + mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, + DP_PWR_STATE_BANDGAP_TPLL, + DP_PWR_STATE_MASK); + mtk_dp_power_disable(mtk_dp); + return ret; + } + } + } + pm_runtime_enable(dev); pm_runtime_get_sync(dev); =20 --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 000FEC001B0 for ; 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a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603292; bh=0hGL/8LzIM49OnwR70sh4p7tQJGg8O110NQk4ZNHwd0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QlRzY3+6MjLfPwDht+YhnrAPXd0qTP00SI/ZJs2PVH+7PXopK2VH41JfJu/yqRZzu 1Ad1vWTsiHqOmy6zhyDLWO8WjlCbsKGY17jGmGS0bHQoxHh39rf0h4m4FeM7IVnRDD lgT1dksa5r6wqTpQRKJgmBNx3ayp554dNJaNO/vOzkzxmU1PoUrcQ5tiY4eeT5bXoD ara+vDSZng/mTtHOJlayeZYvGC5N0B7orm+01qASJttnJhBEVx2olZWnK50jk4J5Oc IDRIykJmehSe7uMioWTLaO7qRrCPrJ77MGrt3c5K4EIYzjL4pHhI8zC0bWJFLrHMwA 9RY0AWrj3uhTg== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 10/11] drm/mediatek: dp: Add .wait_hpd_asserted() for AUX bus Date: Mon, 17 Jul 2023 16:14:37 +0200 Message-Id: <20230717141438.274419-11-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In order to support usecases in which the panel regulator can be switched on and off to save power, and usecases in which the panel regulator is off at boot, add a .wait_hpd_asserted() callback for the AUX bus: this will make sure to wait until the panel is fully ready after power-on before trying to communicate with it. Also, parse the eDP display capabilities in that callback, so that we can also avoid using the .get_edid() callback from this bridge. Since at this point the hpd machinery is performed in the new hpd callback and the detection and edid reading are done outside of this driver, assign the DRM_BRIDGE_OP_{DETECT, EDID, HPD} ops and register the bridge unconditionally at probe time only if we are probing full DisplayPort and not eDP while, for the latter, we register the bridge in the .done_probing() callback and only if the panel was found and triggered HPD. Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Alexandre Mergnat Reviewed-by: CK Hu Tested-by: Chen-Yu Tsai --- drivers/gpu/drm/mediatek/mtk_dp.c | 45 ++++++++++++++++++++++++++----- 1 file changed, 38 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index acdd457b5449..e74295ba9707 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1920,6 +1920,31 @@ static irqreturn_t mtk_dp_hpd_event(int hpd, void *d= ev) return IRQ_WAKE_THREAD; } =20 +static int mtk_dp_wait_hpd_asserted(struct drm_dp_aux *mtk_aux, unsigned l= ong wait_us) +{ + struct mtk_dp *mtk_dp =3D container_of(mtk_aux, struct mtk_dp, aux); + u32 val; + int ret; + + ret =3D regmap_read_poll_timeout(mtk_dp->regs, MTK_DP_TRANS_P0_3414, + val, !!(val & HPD_DB_DP_TRANS_P0_MASK), + wait_us / 100, wait_us); + if (ret) { + mtk_dp->train_info.cable_plugged_in =3D false; + return ret; + } + + mtk_dp->train_info.cable_plugged_in =3D true; + + ret =3D mtk_dp_parse_capabilities(mtk_dp); + if (ret) { + drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n"); + return ret; + } + + return 0; +} + static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp, struct platform_device *pdev) { @@ -2532,6 +2557,12 @@ static int mtk_dp_edp_link_panel(struct drm_dp_aux *= mtk_aux) mtk_dp->next_bridge =3D NULL; return ret; } + + /* For eDP, we add the bridge only if the panel was found */ + ret =3D devm_drm_bridge_add(dev, &mtk_dp->bridge); + if (ret) + return ret; + return 0; } =20 @@ -2568,6 +2599,7 @@ static int mtk_dp_probe(struct platform_device *pdev) mtk_dp->aux.name =3D "aux_mtk_dp"; mtk_dp->aux.dev =3D dev; mtk_dp->aux.transfer =3D mtk_dp_aux_transfer; + mtk_dp->aux.wait_hpd_asserted =3D mtk_dp_wait_hpd_asserted; drm_dp_aux_init(&mtk_dp->aux); =20 spin_lock_init(&mtk_dp->irq_thread_lock); @@ -2600,15 +2632,8 @@ static int mtk_dp_probe(struct platform_device *pdev) =20 mtk_dp->bridge.funcs =3D &mtk_dp_bridge_funcs; mtk_dp->bridge.of_node =3D dev->of_node; - - mtk_dp->bridge.ops =3D - DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD; mtk_dp->bridge.type =3D mtk_dp->data->bridge_type; =20 - ret =3D devm_drm_bridge_add(dev, &mtk_dp->bridge); - if (ret) - return dev_err_probe(dev, ret, "Failed to add bridge\n"); - mtk_dp->need_debounce =3D true; timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0); =20 @@ -2647,6 +2672,12 @@ static int mtk_dp_probe(struct platform_device *pdev) return ret; } } + } else { + mtk_dp->bridge.ops =3D DRM_BRIDGE_OP_DETECT | + DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD; + ret =3D devm_drm_bridge_add(dev, &mtk_dp->bridge); + if (ret) + return dev_err_probe(dev, ret, "Failed to add bridge\n"); } =20 pm_runtime_enable(dev); --=20 2.40.1 From nobody Thu Nov 14 05:47:44 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7055EB64DC for ; Mon, 17 Jul 2023 14:15:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231634AbjGQOPe (ORCPT ); Mon, 17 Jul 2023 10:15:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42398 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232080AbjGQOO6 (ORCPT ); Mon, 17 Jul 2023 10:14:58 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 313FFE56 for ; Mon, 17 Jul 2023 07:14:54 -0700 (PDT) Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by madras.collabora.co.uk (Postfix) with ESMTPSA id 40DAB6607067; Mon, 17 Jul 2023 15:14:52 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1689603292; bh=J2LXqbhqDnB0oQhrTOcYs4nhQoquh9K8gXsYFc7oo4U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j1ny1loxOHOf9zcl/KK79tj3NsJz0oPSmAlAkp1qPQ2NYXQOfWrVJYlLXuekgp8J2 RTXY8WejsO1muPaJINn1hZueTEyLeLThMn8hLPj3meKOHj/uBJ8u5TgY1Uc+aUqYQ+ BILTe48I8ifL4h9AvEr9NmIdw4AlNIi4F6OiM2uG/OWF4FuV8QyXMRum9D3lDjNNcx SenSDurFDMFaCyRJXh9XGnnYIWF8eZHb1Ic4WKDvoWBgtEYb3Qjy7sGmxJf98TmqJP IaxK+xxz57OG4NUNyoSjNn9eoTlURsfOVcdRLwEz4WOx8gf3vMLDIgqzVXKBepvMNr x5A3kvwkoG2zw== From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, daniel@ffwll.ch, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, wenst@chromium.org, nfraprado@collabora.com Subject: [PATCH v6 11/11] drm/mediatek: dp: Don't register HPD interrupt handler for eDP case Date: Mon, 17 Jul 2023 16:14:38 +0200 Message-Id: <20230717141438.274419-12-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> References: <20230717141438.274419-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The interrupt handler for HPD is useful only if a display is actually supposed to be hotpluggable, as that manages the machinery to perform cable (un)plug detection, debouncing and setup for re-training. Since eDP panels are not supposed to be hotpluggable we can avoid using the HPD interrupts altogether and rely on HPD polling only for the suspend/resume case, saving us some spinlocking action and the overhead of interrupts firing at every suspend/resume cycle, achieving a faster (even if just slightly) display resume. Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Alexandre Mergnat Tested-by: Chen-Yu Tsai --- drivers/gpu/drm/mediatek/mtk_dp.c | 81 ++++++++++++++++++------------- 1 file changed, 46 insertions(+), 35 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index e74295ba9707..c06fcc7318e7 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2182,9 +2182,11 @@ static int mtk_dp_bridge_attach(struct drm_bridge *b= ridge, =20 mtk_dp->drm_dev =3D bridge->dev; =20 - irq_clear_status_flags(mtk_dp->irq, IRQ_NOAUTOEN); - enable_irq(mtk_dp->irq); - mtk_dp_hwirq_enable(mtk_dp, true); + if (mtk_dp->bridge.type !=3D DRM_MODE_CONNECTOR_eDP) { + irq_clear_status_flags(mtk_dp->irq, IRQ_NOAUTOEN); + enable_irq(mtk_dp->irq); + mtk_dp_hwirq_enable(mtk_dp, true); + } =20 return 0; =20 @@ -2199,8 +2201,10 @@ static void mtk_dp_bridge_detach(struct drm_bridge *= bridge) { struct mtk_dp *mtk_dp =3D mtk_dp_from_bridge(bridge); =20 - mtk_dp_hwirq_enable(mtk_dp, false); - disable_irq(mtk_dp->irq); + if (mtk_dp->bridge.type !=3D DRM_MODE_CONNECTOR_eDP) { + mtk_dp_hwirq_enable(mtk_dp, false); + disable_irq(mtk_dp->irq); + } mtk_dp->drm_dev =3D NULL; mtk_dp_poweroff(mtk_dp); drm_dp_aux_unregister(&mtk_dp->aux); @@ -2579,40 +2583,44 @@ static int mtk_dp_probe(struct platform_device *pde= v) mtk_dp->dev =3D dev; mtk_dp->data =3D (struct mtk_dp_data *)of_device_get_match_data(dev); =20 - mtk_dp->irq =3D platform_get_irq(pdev, 0); - if (mtk_dp->irq < 0) - return dev_err_probe(dev, mtk_dp->irq, - "failed to request dp irq resource\n"); - - mtk_dp->next_bridge =3D devm_drm_of_get_bridge(dev, dev->of_node, 1, 0); - if (IS_ERR(mtk_dp->next_bridge) && - PTR_ERR(mtk_dp->next_bridge) =3D=3D -ENODEV) - mtk_dp->next_bridge =3D NULL; - else if (IS_ERR(mtk_dp->next_bridge)) - return dev_err_probe(dev, PTR_ERR(mtk_dp->next_bridge), - "Failed to get bridge\n"); - ret =3D mtk_dp_dt_parse(mtk_dp, pdev); if (ret) return dev_err_probe(dev, ret, "Failed to parse dt\n"); =20 + /* + * Request the interrupt and install service routine only if we are + * on full DisplayPort. + * For eDP, polling the HPD instead is more convenient because we + * don't expect any (un)plug events during runtime, hence we can + * avoid some locking. + */ + if (mtk_dp->data->bridge_type !=3D DRM_MODE_CONNECTOR_eDP) { + mtk_dp->irq =3D platform_get_irq(pdev, 0); + if (mtk_dp->irq < 0) + return dev_err_probe(dev, mtk_dp->irq, + "failed to request dp irq resource\n"); + + spin_lock_init(&mtk_dp->irq_thread_lock); + + irq_set_status_flags(mtk_dp->irq, IRQ_NOAUTOEN); + ret =3D devm_request_threaded_irq(dev, mtk_dp->irq, mtk_dp_hpd_event, + mtk_dp_hpd_event_thread, + IRQ_TYPE_LEVEL_HIGH, dev_name(dev), + mtk_dp); + if (ret) + return dev_err_probe(dev, ret, + "failed to request mediatek dptx irq\n"); + + mtk_dp->need_debounce =3D true; + timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0); + } + mtk_dp->aux.name =3D "aux_mtk_dp"; mtk_dp->aux.dev =3D dev; mtk_dp->aux.transfer =3D mtk_dp_aux_transfer; mtk_dp->aux.wait_hpd_asserted =3D mtk_dp_wait_hpd_asserted; drm_dp_aux_init(&mtk_dp->aux); =20 - spin_lock_init(&mtk_dp->irq_thread_lock); - - irq_set_status_flags(mtk_dp->irq, IRQ_NOAUTOEN); - ret =3D devm_request_threaded_irq(dev, mtk_dp->irq, mtk_dp_hpd_event, - mtk_dp_hpd_event_thread, - IRQ_TYPE_LEVEL_HIGH, dev_name(dev), - mtk_dp); - if (ret) - return dev_err_probe(dev, ret, - "failed to request mediatek dptx irq\n"); - platform_set_drvdata(pdev, mtk_dp); =20 if (mtk_dp->data->audio_supported) { @@ -2634,9 +2642,6 @@ static int mtk_dp_probe(struct platform_device *pdev) mtk_dp->bridge.of_node =3D dev->of_node; mtk_dp->bridge.type =3D mtk_dp->data->bridge_type; =20 - mtk_dp->need_debounce =3D true; - timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0); - if (mtk_dp->bridge.type =3D=3D DRM_MODE_CONNECTOR_eDP) { /* * Set the data lanes to idle in case the bootloader didn't @@ -2647,6 +2652,9 @@ static int mtk_dp_probe(struct platform_device *pdev) mtk_dp_initialize_aux_settings(mtk_dp); mtk_dp_power_enable(mtk_dp); =20 + /* Disable HW interrupts: we don't need any for eDP */ + mtk_dp_hwirq_enable(mtk_dp, false); + /* * Power on the AUX to allow reading the EDID from aux-bus: * please note that it is necessary to call power off in the @@ -2692,7 +2700,8 @@ static int mtk_dp_remove(struct platform_device *pdev) =20 pm_runtime_put(&pdev->dev); pm_runtime_disable(&pdev->dev); - del_timer_sync(&mtk_dp->debounce_timer); + if (mtk_dp->data->bridge_type !=3D DRM_MODE_CONNECTOR_eDP) + del_timer_sync(&mtk_dp->debounce_timer); platform_device_unregister(mtk_dp->phy_dev); if (mtk_dp->audio_pdev) platform_device_unregister(mtk_dp->audio_pdev); @@ -2706,7 +2715,8 @@ static int mtk_dp_suspend(struct device *dev) struct mtk_dp *mtk_dp =3D dev_get_drvdata(dev); =20 mtk_dp_power_disable(mtk_dp); - mtk_dp_hwirq_enable(mtk_dp, false); + if (mtk_dp->bridge.type !=3D DRM_MODE_CONNECTOR_eDP) + mtk_dp_hwirq_enable(mtk_dp, false); pm_runtime_put_sync(dev); =20 return 0; @@ -2718,7 +2728,8 @@ static int mtk_dp_resume(struct device *dev) =20 pm_runtime_get_sync(dev); mtk_dp_init_port(mtk_dp); - mtk_dp_hwirq_enable(mtk_dp, true); + if (mtk_dp->bridge.type !=3D DRM_MODE_CONNECTOR_eDP) + mtk_dp_hwirq_enable(mtk_dp, true); mtk_dp_power_enable(mtk_dp); =20 return 0; --=20 2.40.1