From nobody Sun Sep 22 15:33:34 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CC88C4332F for ; Tue, 16 Nov 2021 09:49:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8544061B98 for ; Tue, 16 Nov 2021 09:49:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233506AbhKPJwk (ORCPT ); Tue, 16 Nov 2021 04:52:40 -0500 Received: from mailgw01.mediatek.com ([60.244.123.138]:40824 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S232326AbhKPJwi (ORCPT ); Tue, 16 Nov 2021 04:52:38 -0500 X-UUID: cb298c37100c4f9d9fe4e7b8fef3fb26-20211116 X-UUID: cb298c37100c4f9d9fe4e7b8fef3fb26-20211116 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 454372275; Tue, 16 Nov 2021 17:49:39 +0800 Received: from MTKMBS34N1.mediatek.inc (172.27.4.172) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Tue, 16 Nov 2021 17:49:37 +0800 Received: from MTKCAS36.mediatek.inc (172.27.4.186) by MTKMBS34N1.mediatek.inc (172.27.4.172) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 16 Nov 2021 17:49:36 +0800 Received: from mszsdaap41.gcn.mediatek.inc (10.16.6.141) by MTKCAS36.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 16 Nov 2021 17:49:35 +0800 From: Jitao Shi To: Thierry Reding , Sam Ravnborg , David Airlie , Daniel Vetter , Matthias Brugger , Chun-Kuang Hu , Philipp Zabel , , CC: , , , , , , Jitao Shi Subject: [PATCH v3 2/2] drm/mediatek: control panel's power before MIPI LP11 Date: Tue, 16 Nov 2021 17:49:30 +0800 Message-ID: <20211116094930.11470-3-jitao.shi@mediatek.com> X-Mailer: git-send-email 2.12.5 In-Reply-To: <20211116094930.11470-1-jitao.shi@mediatek.com> References: <20211116094930.11470-1-jitao.shi@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" "auo,kd101n80-45na" requires the panel's IOVDD take precedence over MIPI DATA. Otherwise there is a risk of leakage. Signed-off-by: Jitao Shi Change-Id: I2da6179dea7e15bc5a53fe36db200b6c04f4d551 --- drivers/gpu/drm/mediatek/mtk_dsi.c | 28 ++++++++++++++++++++++------ 1 file changed, 22 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/= mtk_dsi.c index 93b40c245f00..9fff0c483139 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -24,7 +24,7 @@ #include #include #include - +#include #include "mtk_disp_drv.h" #include "mtk_drm_ddp_comp.h" =20 @@ -185,6 +185,7 @@ struct mtk_dsi { struct drm_bridge bridge; struct drm_bridge *next_bridge; struct drm_connector *connector; + struct drm_panel *panel; struct phy *phy; =20 void __iomem *regs; @@ -619,10 +620,16 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi) dsi->data_rate =3D DIV_ROUND_UP_ULL(dsi->vm.pixelclock * bit_per_pixel, dsi->lanes); =20 + if (dsi->panel) { + if (panel_prepare_power(dsi->panel)) { + DRM_INFO("can't prepare power the panel\n"); + goto err_refcount; + } + } ret =3D clk_set_rate(dsi->hs_clk, dsi->data_rate); if (ret < 0) { dev_err(dev, "Failed to set data rate: %d\n", ret); - goto err_refcount; + goto err_prepare_power; } =20 phy_power_on(dsi->phy); @@ -665,6 +672,11 @@ static int mtk_dsi_poweron(struct mtk_dsi *dsi) clk_disable_unprepare(dsi->engine_clk); err_phy_power_off: phy_power_off(dsi->phy); +err_prepare_power: + if (dsi->panel) { + if (panel_unprepare_power(dsi->panel)) + DRM_INFO("Can't unprepare power the panel\n"); + } err_refcount: dsi->refcount--; return ret; @@ -698,6 +710,11 @@ static void mtk_dsi_poweroff(struct mtk_dsi *dsi) clk_disable_unprepare(dsi->digital_clk); =20 phy_power_off(dsi->phy); + + if (dsi->panel) { + if (panel_unprepare_power(dsi->panel)) + DRM_INFO("Can't unprepare power the panel\n"); + } } =20 static void mtk_output_dsi_enable(struct mtk_dsi *dsi) @@ -1001,7 +1018,6 @@ static int mtk_dsi_probe(struct platform_device *pdev) { struct mtk_dsi *dsi; struct device *dev =3D &pdev->dev; - struct drm_panel *panel; struct resource *regs; int irq_num; int ret; @@ -1019,12 +1035,12 @@ static int mtk_dsi_probe(struct platform_device *pd= ev) } =20 ret =3D drm_of_find_panel_or_bridge(dev->of_node, 0, 0, - &panel, &dsi->next_bridge); + &dsi->panel, &dsi->next_bridge); if (ret) goto err_unregister_host; =20 - if (panel) { - dsi->next_bridge =3D devm_drm_panel_bridge_add(dev, panel); + if (dsi->panel) { + dsi->next_bridge =3D devm_drm_panel_bridge_add(dev, dsi->panel); if (IS_ERR(dsi->next_bridge)) { ret =3D PTR_ERR(dsi->next_bridge); goto err_unregister_host; --=20 2.12.5