From patchwork Fri May 3 21:33:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Douglas Anderson X-Patchwork-Id: 13653463 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4CF82C4345F for ; Fri, 3 May 2024 21:37:13 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 88D57113295; Fri, 3 May 2024 21:37:12 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.b="PmIrPFrM"; dkim-atps=neutral Received: from mail-pl1-f171.google.com (mail-pl1-f171.google.com [209.85.214.171]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7DA48113295 for ; Fri, 3 May 2024 21:37:10 +0000 (UTC) Received: by mail-pl1-f171.google.com with SMTP id d9443c01a7336-1e65a1370b7so1136475ad.3 for ; Fri, 03 May 2024 14:37:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1714772229; x=1715377029; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jCEzmsJkNVqJjLKEek1G559OvdmwxBqijlKTr/wX13A=; b=PmIrPFrMnfU6p1yTzoFc4s3BCOEQ6oDwjv8jtaRFrDGH+w3lQhtE3xn1rODdbt7pBe sOpS1sD/XQO/PzrXpAZUdHptJWiIKq9FOkc+4XDUT23H37C3nywNnLkxWxIktQIIQs5B Q/fmo/Co6Yw5mqvNl6DLKa6hBE8hTsUygSr5E= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1714772229; x=1715377029; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jCEzmsJkNVqJjLKEek1G559OvdmwxBqijlKTr/wX13A=; b=V0iMv2pPXhKQ5qvG8iQViWBn8Xel3+mtyG4zgYpU0QBU589aCwD3K+0IViyIVLjYsH 2HnwQIy07EapGQylSx1vTSHUrIZD7D+Lg99p8iQomVAqOwK/MiHo9j17kI4IpxJ98Jw9 FJ52CeIgjqjdzrAP0EQu6jivQ7/QG3gYoxDKuDdEIj4OlbW4gMMFDj24/1bJ/CjmA1Fi 2dQ8iPUEF2g2ZrZ7xyFew5Dqfo6E/m9eh/09no4f6hkojDk6cNs8puXfMuzpK+S+mj13 cI5jmr9J+j2d9GPDA823TP73PdTlgnGG9fWitwDo2RF1qeRd/ZC1CfuyfD/SVsYvJfNW NXIA== X-Gm-Message-State: AOJu0YztqKrwsLVhBy2GQzAYwCp14egxvDtKn6Q256C3lKPf+oaL/CWX CBkwH6n7Xx86bVb7tAYOB1x4Jsxg8j5ZigAYsx94+TbVALMvW8HZMw7fX2rbk5BexbYroqJBcS3 RLg== X-Google-Smtp-Source: AGHT+IF/zJruBSwTUZM1XWyjeIBA3vGsxjzRfWQyTdUJXMgAkw1voDP5oQ1EzE0p/oXqEfQ5DM+Pdw== X-Received: by 2002:a17:902:bb17:b0:1ec:7b0d:9eb9 with SMTP id im23-20020a170902bb1700b001ec7b0d9eb9mr3415331plb.64.1714772229039; Fri, 03 May 2024 14:37:09 -0700 (PDT) Received: from dianders.sjc.corp.google.com ([2620:15c:9d:2:fb6a:b54b:7580:64f3]) by smtp.gmail.com with ESMTPSA id j12-20020a170903024c00b001eb51a46f5bsm3729134plh.43.2024.05.03.14.37.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 May 2024 14:37:08 -0700 (PDT) From: Douglas Anderson To: dri-devel@lists.freedesktop.org, Maxime Ripard Cc: Linus Walleij , Chris Morgan , Yuran Pereira , Neil Armstrong , Douglas Anderson , Sumit Semwal , Benni Steini , Joel Selvaraj , Marijn Suijten , Daniel Vetter , David Airlie , Jessica Zhang , Maarten Lankhorst , Sam Ravnborg , Thomas Zimmermann , linux-kernel@vger.kernel.org Subject: [RFT PATCH v2 19/48] drm/panel: novatek-nt36672a: Don't call unprepare+disable at shutdown/remove Date: Fri, 3 May 2024 14:33:00 -0700 Message-ID: <20240503143327.RFT.v2.19.I67819ba5513d4ef85f254a68b22a3402b4cdf30f@changeid> X-Mailer: git-send-email 2.45.0.rc1.225.g2a3ae87e7f-goog In-Reply-To: <20240503213441.177109-1-dianders@chromium.org> References: <20240503213441.177109-1-dianders@chromium.org> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" It's the responsibility of a correctly written DRM modeset driver to call drm_atomic_helper_shutdown() at shutdown time and that should be disabling / unpreparing the panel if needed. Panel drivers shouldn't be calling these functions themselves. A recent effort was made to fix as many DRM modeset drivers as possible [1] [2] [3] and most drivers are fixed now. A grep through mainline for compatible strings used by this driver indicates that it is used by Qualcomm boards. The Qualcomm driver appears to be correctly calling drm_atomic_helper_shutdown() so we can remove the calls. [1] https://lore.kernel.org/r/20230901234015.566018-1-dianders@chromium.org [2] https://lore.kernel.org/r/20230901234202.566951-1-dianders@chromium.org [3] https://lore.kernel.org/r/20230921192749.1542462-1-dianders@chromium.org Cc: Sumit Semwal Cc: Benni Steini Cc: Joel Selvaraj Cc: Marijn Suijten Signed-off-by: Douglas Anderson Tested-by: Joel Selvaraj --- Changes in v2: - Only handle 1 panel per patch. - Split removal of prepared/enabled from handling of remove/shutdown. drivers/gpu/drm/panel/panel-novatek-nt36672a.c | 17 ----------------- 1 file changed, 17 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36672a.c b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c index 35aace79613a..c2abd20e0734 100644 --- a/drivers/gpu/drm/panel/panel-novatek-nt36672a.c +++ b/drivers/gpu/drm/panel/panel-novatek-nt36672a.c @@ -656,14 +656,6 @@ static void nt36672a_panel_remove(struct mipi_dsi_device *dsi) struct nt36672a_panel *pinfo = mipi_dsi_get_drvdata(dsi); int err; - err = drm_panel_unprepare(&pinfo->base); - if (err < 0) - dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err); - - err = drm_panel_disable(&pinfo->base); - if (err < 0) - dev_err(&dsi->dev, "failed to disable panel: %d\n", err); - err = mipi_dsi_detach(dsi); if (err < 0) dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err); @@ -671,14 +663,6 @@ static void nt36672a_panel_remove(struct mipi_dsi_device *dsi) drm_panel_remove(&pinfo->base); } -static void nt36672a_panel_shutdown(struct mipi_dsi_device *dsi) -{ - struct nt36672a_panel *pinfo = mipi_dsi_get_drvdata(dsi); - - drm_panel_disable(&pinfo->base); - drm_panel_unprepare(&pinfo->base); -} - static const struct of_device_id tianma_fhd_video_of_match[] = { { .compatible = "tianma,fhd-video", .data = &tianma_fhd_video_panel_desc }, { }, @@ -692,7 +676,6 @@ static struct mipi_dsi_driver nt36672a_panel_driver = { }, .probe = nt36672a_panel_probe, .remove = nt36672a_panel_remove, - .shutdown = nt36672a_panel_shutdown, }; module_mipi_dsi_driver(nt36672a_panel_driver);