From nobody Fri Sep 20 14:22:14 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 6ADD9C001DE for ; Thu, 6 Jul 2023 12:30:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231967AbjGFMag (ORCPT ); Thu, 6 Jul 2023 08:30:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37402 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231213AbjGFMad (ORCPT ); Thu, 6 Jul 2023 08:30:33 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 585FF19B for ; Thu, 6 Jul 2023 05:30:32 -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 5BEB96606FC1; Thu, 6 Jul 2023 13:30:30 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688646631; bh=J4Fv7OzB3CUSENYuwp4dZcyez8bgaU+pGcJI0tK+03w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iA3k0+3Z/8ftJGh/iw9czlTaoBAbmxaJsnf7fY/9LOKFSPSqYPttEPLNFzJjCp5k/ +Eq59DJGP0p1v1IOJ0JG2ygY8qAm6gR5XFlbZAAv4bArNBalf6l658TQVffJJJg+Np ZxoekOQz4mSOirnNzxvam8Tu+yWG8lQcnsTfGzbY1h9+y/zKmykaYp3Ifn0Uu/pNW/ 7TAggRXJ53KdlZMZC264l4WU6xUkWX21pawlFovFjswUxlPmZ2bYj4WwntlJBZ4F9d YVsT3gjx3VmBtep05NHDePmoX0FrojI/nKZLkexv/KwfTROxosnocV6KvAgAHj0hLz 9Ax0qbbGGfYdQ== 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 v4 1/9] drm/mediatek: dp: Cache EDID for eDP panel Date: Thu, 6 Jul 2023 14:30:17 +0200 Message-Id: <20230706123025.208408-2-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230706123025.208408-1-angelogioacchino.delregno@collabora.com> References: <20230706123025.208408-1-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" Since eDP panels are not removable it is safe to cache the EDID: this will avoid a relatively long read transaction at every PM resume that is unnecessary only in the "special" case of eDP, hence speeding it up a little, as from now on, as resume operation, we will perform only link training. Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Matthias Brugger Tested-by: Chen-Yu Tsai --- drivers/gpu/drm/mediatek/mtk_dp.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index 64eee77452c0..fdf5b7686884 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -118,6 +118,7 @@ struct mtk_dp { const struct mtk_dp_data *data; struct mtk_dp_info info; struct mtk_dp_train_info train_info; + struct edid *edid; =20 struct platform_device *phy_dev; struct phy *phy; @@ -1993,7 +1994,11 @@ static struct edid *mtk_dp_get_edid(struct drm_bridg= e *bridge, usleep_range(2000, 5000); } =20 - new_edid =3D drm_get_edid(connector, &mtk_dp->aux.ddc); + /* eDP panels aren't removable, so we can return a cached EDID. */ + if (mtk_dp->bridge.type =3D=3D DRM_MODE_CONNECTOR_eDP && mtk_dp->edid) + new_edid =3D drm_edid_duplicate(mtk_dp->edid); + else + new_edid =3D drm_get_edid(connector, &mtk_dp->aux.ddc); =20 /* * Parse capability here to let atomic_get_input_bus_fmts and @@ -2022,6 +2027,10 @@ static struct edid *mtk_dp_get_edid(struct drm_bridg= e *bridge, drm_atomic_bridge_chain_post_disable(bridge, connector->state->state); } =20 + /* If this is an eDP panel and the read EDID is good, cache it for later = */ + if (mtk_dp->bridge.type =3D=3D DRM_MODE_CONNECTOR_eDP && !mtk_dp->edid &&= new_edid) + mtk_dp->edid =3D drm_edid_duplicate(new_edid); + return new_edid; } =20 --=20 2.40.1 From nobody Fri Sep 20 14:22:14 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 BD1E4EB64D9 for ; Thu, 6 Jul 2023 12:30:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232034AbjGFMaj (ORCPT ); Thu, 6 Jul 2023 08:30:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37414 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231756AbjGFMae (ORCPT ); Thu, 6 Jul 2023 08:30:34 -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 9367F1BC2 for ; Thu, 6 Jul 2023 05:30:33 -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 4B89E6606FC4; Thu, 6 Jul 2023 13:30:31 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688646632; bh=uVXES41+SNz3wCuFFhff8HC0aikP7yFXG8f408XhhDc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WFXJ75yeyoU5fuGsN7X2BkXCJx8aKr8VGzX3SpqOHuhpdottuvpBXbS30D48F3Gsm 06KQo9PsMElMTMc+vU+vgBV9vg8qVWkp8dHKJz/bHBuf6zkWDSgMitjFBWN8oD/+QX I94PlrdB6AMyCk6SngH8PmsjRHNNhriASVMMLsfl7oQbfdIgYzdOyJIjHI8vyVBq7k NYoRBQAvt5umNN/4IQD4MNCtDIshyTsWR9bkTjO2/q6+8V1yj5ug29W7Tst8mSPpib /nLM6/T78jTNIKZGJR16QWqYFS6MmrS+QyjUI4mSZbL+31pgBxlhP2i3D3KZ0bk6Mz 8bjnZ5pVXulZA== 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 v4 2/9] drm/mediatek: dp: Move AUX and panel poweron/off sequence to function Date: Thu, 6 Jul 2023 14:30:18 +0200 Message-Id: <20230706123025.208408-3-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230706123025.208408-1-angelogioacchino.delregno@collabora.com> References: <20230706123025.208408-1-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 --- 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 fdf5b7686884..8f7d4af7076f 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1252,6 +1252,29 @@ 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, @@ -1937,16 +1960,9 @@ 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 @@ -1958,16 +1974,8 @@ 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; } @@ -1983,15 +1991,7 @@ 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 /* eDP panels aren't removable, so we can return a cached EDID. */ @@ -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 @@ -2187,15 +2179,7 @@ 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 Fri Sep 20 14:22:14 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 41BA9C0015E for ; Thu, 6 Jul 2023 12:30:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232066AbjGFMal (ORCPT ); Thu, 6 Jul 2023 08:30:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37416 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231802AbjGFMaf (ORCPT ); Thu, 6 Jul 2023 08:30:35 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 28EC519B for ; Thu, 6 Jul 2023 05:30:34 -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 3A3DC6606FC5; Thu, 6 Jul 2023 13:30:32 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688646633; bh=eiF+MPOcDv9CDEFKbz/2nzTwuFjo2RNY4YZzBre0LbM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OQNqTl/1PE5lx6QecqCAcVKxRo9TdiDhT7DlARV+Z4YqyJ/ya30FTg+bdZdACDtsm 7e0moLQLKsb/m+Dj3P5R/vDXNkajz/e2UAQmmftQqiWrvuDsa1knmlOROGvvaBvqpN +2b5RROPznSuNeEFgL6CiSMwS6FndbuqHMifS2bx6egNtX7FMOaONukVQihSbkgXT3 KyUV8J7lylA+JV3qCTzARcLcThNe0r8FFdJ3HIQlcucYV17LRFWeCWskyNwH9S1kyE tPndYj+Dzlhap/boYAmt5uvxAwzuiYmdd21EtyKNq6eT6XigOxydQti+tx22ScBvx2 7+ZjXq2nSSkqw== 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 v4 3/9] drm/mediatek: dp: Always return connected status for eDP in .detect() Date: Thu, 6 Jul 2023 14:30:19 +0200 Message-Id: <20230706123025.208408-4-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230706123025.208408-1-angelogioacchino.delregno@collabora.com> References: <20230706123025.208408-1-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 this is an eDP panel it's not removable, hence it's always connected: as a shortcut, always return connector_status_connected in the .detect() callback for eDP connector, avoiding a poweron, a check for sink count and a poweroff. Signed-off-by: AngeloGioacchino Del Regno Tested-by: Chen-Yu Tsai --- drivers/gpu/drm/mediatek/mtk_dp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index 8f7d4af7076f..5b35a2e23896 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1957,6 +1957,9 @@ static enum drm_connector_status mtk_dp_bdg_detect(st= ruct drm_bridge *bridge) bool enabled =3D mtk_dp->enabled; u8 sink_count =3D 0; =20 + if (mtk_dp->bridge.type =3D=3D DRM_MODE_CONNECTOR_eDP) + return connector_status_connected; + if (!mtk_dp->train_info.cable_plugged_in) return ret; =20 --=20 2.40.1 From nobody Fri Sep 20 14:22:14 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 6C031C001DE for ; Thu, 6 Jul 2023 12:30:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232177AbjGFMap (ORCPT ); Thu, 6 Jul 2023 08:30:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37426 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231972AbjGFMag (ORCPT ); Thu, 6 Jul 2023 08:30:36 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09535E72 for ; Thu, 6 Jul 2023 05:30:35 -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 265726606FC6; Thu, 6 Jul 2023 13:30:33 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688646633; bh=yC6E/mBM/67sUzeZV3Il3wBBzCtdEOHPS+iJkXdky+c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GgT/1lsWIVlTK/HPW/RWvCKuOXCXF14NVBF7ybqd8Ohqh6bjDOlSBJEXZOJk3G/9c JrVyaPTWeGT9kpcletskQGZpKvWpEATDYQ/vTcYc0sXBxaO2vH/Df1ZElhNxv37IBV NyGKvX9xbHkePJ+fnu4nakM8B30WZEjwyqrUAOmYEwyBlBf8hxq/v2qKzeZ97g1FjA IzTFX5jqv1IVizB3MQAcy9d9f3SqisJPDgK+j3H1/AZMa8R94sqQyK6qZEpquaia4c LpO8cU+TT1Feqyg928pAuxkDTWQnw+/Z9bQOU5pmZDBkwYua2r8ZDM7erYgdeqPeVP bNYJ4LCvTGijQ== 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 v4 4/9] drm/mediatek: dp: Always set cable_plugged_in at resume for eDP panel Date: Thu, 6 Jul 2023 14:30:20 +0200 Message-Id: <20230706123025.208408-5-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230706123025.208408-1-angelogioacchino.delregno@collabora.com> References: <20230706123025.208408-1-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" eDP panels are not removable: at PM resume, the cable will obviously still be plugged in. Signed-off-by: AngeloGioacchino Del Regno Tested-by: Chen-Yu Tsai --- drivers/gpu/drm/mediatek/mtk_dp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index 5b35a2e23896..35f3549d258e 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2606,6 +2606,9 @@ static int mtk_dp_resume(struct device *dev) mtk_dp_hwirq_enable(mtk_dp, true); mtk_dp_power_enable(mtk_dp); =20 + if (mtk_dp->bridge.type =3D=3D DRM_MODE_CONNECTOR_eDP) + mtk_dp->train_info.cable_plugged_in =3D true; + return 0; } #endif --=20 2.40.1 From nobody Fri Sep 20 14:22:14 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 C5A45EB64DD for ; Thu, 6 Jul 2023 12:30:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231972AbjGFMas (ORCPT ); Thu, 6 Jul 2023 08:30:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231980AbjGFMag (ORCPT ); Thu, 6 Jul 2023 08:30:36 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E96F5171A for ; Thu, 6 Jul 2023 05:30:35 -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 1AA9F6606FC7; Thu, 6 Jul 2023 13:30:34 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688646634; bh=MT3q4EebZmygE+KyNdwlHQ30iT82ATSvvXBZJkPrX44=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U2pmuJ9Zhma74iPKRa3VbSF+KtxhrXTCDQQQ7v5UiBANm8VwaEDMciIqSQy2/WKTS zS5Tc4F2x2tk46sS5Yz1/025SYo5YEDuepEVesh10KmTyrmjFdMuulHGjPVQvdzy9d pUstFb2AhQK9piecuumsOxii6vnrODdnmerqoE37+8VtoKuM0g4XyEVR0Ef9cTEAyp TRoBTJ8/bvikHm42nvEg3JSytGPWKnFCdHZkCoDxqJsrmk9/CjbDgbELxgrpuTn/GY Zt1fWRLYJaZdGGZK5CobN1cgxBKM+bcB6K+nhyI16gHU4qXA8TIUcQlr5sMeDxD64O HJ9H5O4m6q8QQ== 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 v4 5/9] drm/mediatek: dp: Change logging to dev for mtk_dp_aux_transfer() Date: Thu, 6 Jul 2023 14:30:21 +0200 Message-Id: <20230706123025.208408-6-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230706123025.208408-1-angelogioacchino.delregno@collabora.com> References: <20230706123025.208408-1-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 --- 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 35f3549d258e..274119356dfb 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -848,7 +848,7 @@ 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; } @@ -2061,7 +2061,7 @@ 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; @@ -2077,7 +2077,7 @@ 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 Fri Sep 20 14:22:14 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 DDBD4EB64D9 for ; Thu, 6 Jul 2023 12:30:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232413AbjGFMay (ORCPT ); Thu, 6 Jul 2023 08:30:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37450 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232022AbjGFMah (ORCPT ); Thu, 6 Jul 2023 08:30:37 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D70711BC9 for ; Thu, 6 Jul 2023 05:30:36 -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 07B4F6606FCD; Thu, 6 Jul 2023 13:30:34 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688646635; bh=SDqfcPu1Xm6TXPZRhcStnENnmo+lyeo6d7YVf6Sycu0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=euhM+DGkPbR6J+sZeCx8RXgfRJH2oDNdzh6srd6wwkNDIOx+BzpPxg31HoBZ8zEZl mSMnLCiYl8JSzXxyFJwBsjHcKeppF5MwIpMCSf7quGyOpC0vPEAzLDzcvvYGUEJYlS Oc9//UfCPrS65h5BlDNQbu3h5zJZ5df0lTcsMsC7wyJqjudio3JQjuTui7ee0Fcky+ LcDFJ/I9fEAnHYhJw7V1WlpGhSPR7o4hozevRh5MKJi8dJO9L83p57KyCZaoV1AQS8 0WOFbJWezUoCJ+Zi15vWy88V1E8vwxzazZtBHLqRu3o003rw0TCikG8jV6j88w6GZi WTTTr7uJqjUGw== 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 v4 6/9] drm/mediatek: dp: Enable event interrupt only when bridge attached Date: Thu, 6 Jul 2023 14:30:22 +0200 Message-Id: <20230706123025.208408-7-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230706123025.208408-1-angelogioacchino.delregno@collabora.com> References: <20230706123025.208408-1-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 implementing support for aux-bus in this driver, add a IRQ_NOAUTOEN flag to the event interrupt that we request at probe time and manage the enablement of the ISR at bridge_attach and detach time. When aux-bus will be implemented, enabling the interrupt before attaching the bridge will create an event storm and hang the kernel during boot. In any case, the interrupt handler anyway requires resources that are initialized by mtk_dp_bridge_attach(), so it cannot do anything meaningful without... and even crash, but that's not happening in the current code because the HW remains unpowered until resources are made available. Signed-off-by: AngeloGioacchino Del Regno 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 274119356dfb..eebcb32e67ee 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]; @@ -2147,6 +2148,8 @@ 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; @@ -2163,6 +2166,7 @@ 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); @@ -2481,7 +2485,7 @@ 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) @@ -2490,9 +2494,9 @@ 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); @@ -2513,7 +2517,8 @@ 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 Fri Sep 20 14:22:14 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 17167EB64DD for ; Thu, 6 Jul 2023 12:30:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232396AbjGFMax (ORCPT ); Thu, 6 Jul 2023 08:30:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37572 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231751AbjGFMan (ORCPT ); Thu, 6 Jul 2023 08:30:43 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E62FD1BD6 for ; Thu, 6 Jul 2023 05:30:37 -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 E43326606FC1; Thu, 6 Jul 2023 13:30:35 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688646636; bh=5+0g34fw0wGVdF8pSXSyeJt5CPUOp79klTRlFXdGl4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PXRdj/hwHQs2SS81BQtrJIekePJZYwkIN/n2Ikp2BxktX6eGrI213k29FdWmkIYe5 hVg7B2E/Qrmy3m27lgj54mi/lEmr9stGO4ZeuQRis4apiQFKZyfxTGtNOb/6JhhB6T s2hE7LiTsKshLGTET5+QLNk8OO40i9FCJsR1dg28ncRoyPLq0d3d9/K4EDZm2hb3YK m2qYk8qRFiQorjGMfTJTRHAyQK84SaUKmApKeDWu2THIKisZlKErE64VTNpSCfyd7/ pHJVaOU+Vj3+qugYlIlfliCc1QUQx0wcjwKF4MlwmMpbvvqDoLF9XAHRLEzGLoTGey g6G9Ds1ehO4og== 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 v4 7/9] drm/mediatek: dp: Use devm variant of drm_bridge_add() Date: Thu, 6 Jul 2023 14:30:23 +0200 Message-Id: <20230706123025.208408-8-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230706123025.208408-1-angelogioacchino.delregno@collabora.com> References: <20230706123025.208408-1-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 --- drivers/gpu/drm/mediatek/mtk_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index eebcb32e67ee..6bc620aded45 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -2564,7 +2564,7 @@ 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); + devm_drm_bridge_add(dev, &mtk_dp->bridge); =20 mtk_dp->need_debounce =3D true; timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0); --=20 2.40.1 From nobody Fri Sep 20 14:22:14 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 7C20AEB64DC for ; Thu, 6 Jul 2023 12:30:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232362AbjGFMav (ORCPT ); Thu, 6 Jul 2023 08:30:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37608 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232178AbjGFMap (ORCPT ); Thu, 6 Jul 2023 08:30:45 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AEF221BE3 for ; Thu, 6 Jul 2023 05:30:38 -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 D2FED6606FC4; Thu, 6 Jul 2023 13:30:36 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688646637; bh=ZoMduMOyhFGLpq32e7smW1OgDxFAiDhe86tDwqNFVyw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZbJh7Objy5rebfeCtn91lhCxvUHElbhzTrM64pU1PV1nJIzAN9coGciR1/BRWjYTG 9j8yHLRMp4nBWT8YJgSYl37SZ+NEyQbGyghhECgjmutitaLpikGwq3eQljBmCOFPoF h++L+P5mOGlAmCBZBDgvP42+8Rm9b71zkNKzFeYm1R8F96Bn65D4tZoN2ss1QogaWy VZmIF+DBm0Gx0XGHGXhYqrF2By58+LBhU3P2uP3uVHwP8NdgmjTEJEnJ/TKKZ02deK y1XXoNualdeUyJEYJK0DI2fm67tbZQxMkXZYjgoX9gl2bxdyO0Dhoe+/VyXrn02dsu 6swOpVmjeynWQ== 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 v4 8/9] drm/mediatek: dp: Move AUX_P0 setting to mtk_dp_initialize_aux_settings() Date: Thu, 6 Jul 2023 14:30:24 +0200 Message-Id: <20230706123025.208408-9-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230706123025.208408-1-angelogioacchino.delregno@collabora.com> References: <20230706123025.208408-1-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 --- 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 6bc620aded45..2ad836fbb7c4 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -1011,6 +1011,11 @@ 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) @@ -1823,10 +1828,6 @@ 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 Fri Sep 20 14:22:14 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 E58CDC0015E for ; Thu, 6 Jul 2023 12:31:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232268AbjGFMbB (ORCPT ); Thu, 6 Jul 2023 08:31:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37630 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232229AbjGFMap (ORCPT ); Thu, 6 Jul 2023 08:30:45 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6E081BF1 for ; Thu, 6 Jul 2023 05:30:39 -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 C1FD96606FC5; Thu, 6 Jul 2023 13:30:37 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1688646638; bh=9O3oPbgNu2Rdb7yDbhzv2dqxXHdNKO6uVeeOVLaab60=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S9fh0zEBn+hmDuKxNXcSQGYU3PiJv74boIpg00AXRaYaeGZxP4Ni8Ny2Amkx7qdl/ rGvdeaW6uqLFXPrlClXwRCWRp7wGTGV/jOzY/WKQjUXUhoohNueTEHC9IJSUul86UE DxSrEtVL2Z0LtEl86xJictTt3SMgb3bUIQFBa7+bu7Rc9RcXvcLqwKKC7kG3Pl/Bxq QYVMmO2xtndAaQnwDPrOKR+0Zb/dYTiZRAMmaRDmKKmBenFto8KbTOFVe62QqVh6/A 1ptYi6/AAxC95PB9pW359bQlxj1cOZehIjH6WmcwllwetLsr9HJEFrNbqz5kro2fUK ttYiWsPLR7dxg== 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 v4 9/9] drm/mediatek: dp: Add support for embedded DisplayPort aux-bus Date: Thu, 6 Jul 2023 14:30:25 +0200 Message-Id: <20230706123025.208408-10-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230706123025.208408-1-angelogioacchino.delregno@collabora.com> References: <20230706123025.208408-1-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 --- drivers/gpu/drm/mediatek/mtk_dp.c | 72 ++++++++++++++++++++++++++----- 1 file changed, 62 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/m= tk_dp.c index 2ad836fbb7c4..16109d5ca5ae 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 @@ -2042,7 +2043,8 @@ static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux = *mtk_aux, =20 mtk_dp =3D container_of(mtk_aux, struct mtk_dp, aux); =20 - 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; } @@ -2153,6 +2155,11 @@ static int mtk_dp_bridge_attach(struct drm_bridge *b= ridge, enable_irq(mtk_dp->irq); mtk_dp_hwirq_enable(mtk_dp, true); =20 + if (mtk_dp->bridge.type =3D=3D DRM_MODE_CONNECTOR_eDP) { + mtk_dp->train_info.cable_plugged_in =3D true; + drm_helper_hpd_irq_event(mtk_dp->drm_dev); + } + return 0; =20 err_bridge_attach: @@ -2482,6 +2489,25 @@ 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_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; + struct drm_bridge *panel_aux_bridge; + + panel_aux_bridge =3D devm_drm_of_get_bridge(dev, dev->of_node, 1, 0); + + /* Power off the DP: either detection is done, or no panel present */ + mtk_dp_aux_panel_poweron(mtk_dp, false); + mtk_dp_power_disable(mtk_dp); + + if (IS_ERR(panel_aux_bridge)) + return PTR_ERR(panel_aux_bridge); + + mtk_dp->next_bridge =3D panel_aux_bridge; + return 0; +} + static int mtk_dp_probe(struct platform_device *pdev) { struct mtk_dp *mtk_dp; @@ -2500,21 +2526,14 @@ static int mtk_dp_probe(struct platform_device *pde= v) 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); - 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 - 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 @@ -2570,6 +2589,39 @@ 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 panel 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_aux_panel_poweron(mtk_dp, true); + + 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_aux_panel_poweron(mtk_dp, false); + mtk_dp_power_disable(mtk_dp); + return ret; + } + } + } + pm_runtime_enable(dev); pm_runtime_get_sync(dev); =20 --=20 2.40.1