From nobody Fri Nov 29 04:47:50 2024 Received: from mail-pl1-f176.google.com (mail-pl1-f176.google.com [209.85.214.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 684701AB6E4 for ; Thu, 26 Sep 2024 09:29:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727342982; cv=none; b=IvtWgaAutuqAROu2WVI9ZSPB3tiZ8ozb+R5gXMTvIDckiK1UMEk+dtfKGhIwpiK0ubYWPNGwl3xBgGlD7VW/mPUNtoCfeMn6I32MuInYSRbRHh9LcsLfKaAGw9NFazVU/70Rai9giz4cQZISKgrjwJbOa7MlNK798PAEwiFf4JI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727342982; c=relaxed/simple; bh=tceRt2G+y4WaDcfTHX1urDzTFuHzkPAJeqFAeugwTiw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dgrk+6cwfYOUhDhvsKQcJHkxkYDFK3LKgmDHecPs7lRTRxbDW3Zghtz+rPWyg2jfS9Nf69Le3JrWYpSUXgBjq22bCIOgV3dqOBg2SWQhJKdcJgWFljKPyJarB/v/HRuG/M5w7iOee7CdHrWku453jvNbpCk85eh4s8FPuxt4P2I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=NOTlu3H1; arc=none smtp.client-ip=209.85.214.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="NOTlu3H1" Received: by mail-pl1-f176.google.com with SMTP id d9443c01a7336-2055136b612so8973865ad.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=vger.kernel.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=NOTlu3H1/ABJUOHh68V3Ts+/xP+L0PBvUa3yFO7HP1uVwmrL3po8ZASpvsN6I3SCeN UC6Aozkts/1LNpzay/P7phE2IMdXrz6esgMTN+sgl5+gBMoPVWVV0R4tsmwITVvef8Ur VN6hmsPtqF6rlrAo8wtue0peWAG+CKEVVts8E= 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=IVM/JG9Zo69qSPzKbv1N/RBg7k3vEUsegCb3xWhIxwSzlYEeyb3BOl/88rn9uc2wzc jnLoJiwp8EtcnDY4e+KIJK3kDyFQ6cN0TTwn7blwYf9lwT2stVI6nkm6pc0i/n9m5K1P 5FyOBq6kWu6TrvO1FQ7HvbeQXgrrXS27HWb1LFe2NBZDlTNfhS+LAPbXwpJZo5MeBGWW 29sRJumb9P6uCZ5Ui6SCZLQeKbhXGDDqJU8TU0qehBW/HRtWxKEBtSHPExM7hs+bmleU tnbYwIGrWa52pRY3aGnxiBz8W3oVAAnIB89oDAyso65MHiMIF5uNvRXvBaEnkmO5CFJQ LzHQ== X-Gm-Message-State: AOJu0YzjDtUJpNJf9Wudz5ci2f8A35x1bmL5+621EzVdy/WKUQP02qi/ d2HEyN41jZGWO1RtVORSrdRSyipnqSyErOuJ/r8EnqAtxzH7hUXo/pKVM7DqYw== 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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/br= idge/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); =20 anx7625_stop_dp_work(ctx); + if (!ctx->pdata.panel_bridge) + anx7625_remove_edid(ctx); anx7625_power_standby(ctx); =20 mutex_unlock(&ctx->lock); --=20 2.46.0.792.g87dc391469-goog