From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 478241F8F13; Fri, 6 Dec 2024 14:57:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733497067; cv=none; b=mJGCs3LXhsSj7cxOqKXEWO2NTHkb1aDQAMYW+vdNbDYYM0famkoa4/bbzaRFrbDvcxXdDe6GMCR4bTmS7JDjn6UI9F0i3Wa/HqqueZQpqf3JXeMm6UI/iwOIp1Kst7ho6JgbiqI0uHGfNgZyIR2GbHUarF9VYmJSRhsJYjOHCJ0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733497067; c=relaxed/simple; bh=ivBta/DdumJiRl5D0o2BtOVddM4HirCVfhW/SNvTRbg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UN32xoxw6wHDKYXqLW4DNWrM15PlSlRWsYZzsn/eCinrJu6DYU/dj7i7ZiJuDr54dgZUBVUgtTZVJTGhFTzUZGPgp2iW9b0O+hBV7dc9JrZjzlW6lQJ70Q/qKwZSN6y3sfyXjxGGAkkOaSJN6osU/AprmhRVVAQTntKZ9CUoJTw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=H9LB9rK7; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="H9LB9rK7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A263BC4CED1; Fri, 6 Dec 2024 14:57:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1733497067; bh=ivBta/DdumJiRl5D0o2BtOVddM4HirCVfhW/SNvTRbg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H9LB9rK7OmDEe7r/jmdN9S2i4F+yWicKNZ1DElzaXRizyZ59I+CgPNQe0b5ZDhfwk /XYFxoIy6tVIDaKC8nWcKW+pGffQ6cQNm1ryZ+2noPmKI8Dt4f1xlh6xajJrU/ZMzH NFHhhnXUMmLaGYfkBHHpKVC3nwKq239Bhe8VIIv0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pin-yen Lin , Dmitry Baryshkov , Douglas Anderson , Sasha Levin Subject: [PATCH 6.6 185/676] drm/bridge: it6505: Drop EDID cache on bridge power off Date: Fri, 6 Dec 2024 15:30:04 +0100 Message-ID: <20241206143700.573933368@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241206143653.344873888@linuxfoundation.org> References: <20241206143653.344873888@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pin-yen Lin [ Upstream commit 574c558ddb68591c9a4b7a95e45e935ab22c0fc6 ] 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: 11feaef69d0c ("drm/bridge: it6505: Add caching for EDID") Signed-off-by: Pin-yen Lin Reviewed-by: Dmitry Baryshkov Reviewed-by: Douglas Anderson Signed-off-by: Douglas Anderson Link: https://patchwork.freedesktop.org/patch/msgid/20240926092931.3870342-3-treapking@chromium.org Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/ite-it6505.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c index 4ad527fe04f27..93eb8fba23d42 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -3104,6 +3104,8 @@ static __maybe_unused int it6505_bridge_suspend(struct device *dev) { struct it6505 *it6505 = dev_get_drvdata(dev); + it6505_remove_edid(it6505); + return it6505_poweroff(it6505); } -- 2.43.0