From patchwork Thu Sep 26 09:29:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pin-yen Lin X-Patchwork-Id: 13813104 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 DBC65CCF9E9 for ; Thu, 26 Sep 2024 09:29:42 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 57DAF10E2EB; Thu, 26 Sep 2024 09:29:42 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.b="oCP5R1u2"; dkim-atps=neutral Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2AB3F10E2EB for ; Thu, 26 Sep 2024 09:29:41 +0000 (UTC) Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-2055136b612so8973855ad.0 for ; Thu, 26 Sep 2024 02:29:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1727342981; x=1727947781; 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=4nTlJ8reywH+UC/jgM6J/PkAv8gFWsekGW6wrV9sFl8=; b=oCP5R1u2zKWpnlPDGVLNFjE+Bp7LIBVfhAW4b6lWxHwnskeAyTG3pgIggJUAplxAHc d658jy5ehS1NwrjWu4wej0PEFiTvOXIm/Yk7uBrExc9t3DKNXyYefXF1iVbST9SBiopT pxFiIcxGbWJ4oLROSDGhdgJaKwY1IcZmEJe6w= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727342981; x=1727947781; 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=4nTlJ8reywH+UC/jgM6J/PkAv8gFWsekGW6wrV9sFl8=; b=D39FHDbSvLJoYIdRo1QpnXDf8DHMvLcOsaC/B6LW/yAaqleDVHYqDwjXL+X2zK2f95 rBZUvCnG2f5XStLPhntAYDdp3O8VPzb8mGwUBzg8A//r9L6ryC3ZccsDajnnTpTxNy1K RWa8YjJ5nY3jW/REVWHUAjXz3dyjuSqhLyMc57P6cs0fDEGFWFAPI8S65RIz6q2yKxZN jI24eKuJz59gBn+gHaC+etcMZXmDXcY4upLhjf66NO4Y6KIQ9NP+FIU3Z27bqgbygk58 XqVBEKgNPSCriJjJ0n7Cb5MMb+Q4YyVitr/z0e6El54HVKYgtjzw7JKljL2sJjmbrrhl bLIQ== X-Forwarded-Encrypted: i=1; AJvYcCUpKK1lupW3xHXdQFC2Kzjnp2USwQVRudqaWjLjh/6AW8AJzlA77FZNDg/6hA2tVuLjLVk2kLIUIgM=@lists.freedesktop.org X-Gm-Message-State: AOJu0YzWR6grEiaoe68NO0/2GLwcSVU2P42cNaPxHD5c3T6QwURw/fHr 3n8jR6peR2kgdARdb32w+EvD1DI48SuQ6CTUUx24W6QsBsn0hNJt48NMdVvdaA== X-Google-Smtp-Source: AGHT+IEJGdzaJvD2oLJXYm0GdTv7+DhwanIXJf+yHPiigY6DhQrpoz5uhLKvyVCzsX1nrFaQy7M1XA== X-Received: by 2002:a17:903:2bce:b0:206:a239:de67 with SMTP id d9443c01a7336-20afc435afamr79921955ad.18.1727342980725; Thu, 26 Sep 2024 02:29:40 -0700 (PDT) Received: from treapking.tpe.corp.google.com ([2401:fa00:1:10:4234:cfaa:3b83:d75a]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20af1720b00sm34819105ad.64.2024.09.26.02.29.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Sep 2024 02:29:40 -0700 (PDT) From: Pin-yen Lin To: Xin Ji , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Douglas Anderson , Pin-yen Lin , Sam Ravnborg , Dmitry Baryshkov Subject: [PATCH v2 1/2] drm/bridge: anx7625: Drop EDID cache on bridge power off Date: Thu, 26 Sep 2024 17:29:08 +0800 Message-ID: <20240926092931.3870342-2-treapking@chromium.org> X-Mailer: git-send-email 2.46.0.792.g87dc391469-goog In-Reply-To: <20240926092931.3870342-1-treapking@chromium.org> References: <20240926092931.3870342-1-treapking@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" The bridge might miss the display change events when it's powered off. This happens when a user changes the external monitor when the system is suspended and the embedded controller doesn't not wake AP up. It's also observed that one DP-to-HDMI bridge doesn't work correctly when there is no EDID read after it is powered on. Drop the cache to force an EDID read after system resume to fix this. Fixes: 8bdfc5dae4e3 ("drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP") Signed-off-by: Pin-yen Lin Reviewed-by: Dmitry Baryshkov Reviewed-by: Douglas Anderson --- Changes in v2: - Only drop the EDID cache for anx7625 when it's not in eDP mode - Collect review tag drivers/gpu/drm/bridge/analogix/anx7625.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index 88e4aa5830f3..5c6bd7be25c0 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -2561,6 +2561,8 @@ static int __maybe_unused anx7625_runtime_pm_suspend(struct device *dev) mutex_lock(&ctx->lock); anx7625_stop_dp_work(ctx); + if (!ctx->pdata.panel_bridge) + anx7625_remove_edid(ctx); anx7625_power_standby(ctx); mutex_unlock(&ctx->lock);