From nobody Fri Nov 29 03:41:30 2024 Received: from mail-pl1-f182.google.com (mail-pl1-f182.google.com [209.85.214.182]) (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 489EC1AC441 for ; Thu, 26 Sep 2024 09:29:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.182 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727342985; cv=none; b=kq7eWsEog/zhNs7wztlAMmU6Nm7OAmzhTkWaaJl6RAzNimHLxdwnctmi7h4eSHLA2iYsLyqbTksIFz+BPmzHQwH33hmhLJS5VEhmmU4NTsWUgOFXWzgDvEkS3iqD4mH/BVNpiJ4VfJe7ZD9tPkON1jVnVFXyy5qzj/vy3TC7Zto= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727342985; c=relaxed/simple; bh=tkrxBATaBcqKod9pjIDQEXjlc5uLNRjLyEp3j7CQA14=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hkpl7cAbG2pJ7c5e7wNO2mAHmG9xFkCQYsTK5vBz2P8UybrLb9h+u8M8XFKmwGFOsckdqtd/j/0Z96f8OL0QPFgKxv/rUb8dSo4B5qS9/OQOIeNE70mBq8QKz5P1zqbciJFcY1mpkihoij3jqORFrgKuKjW1FDUoKizCeyFa2Vg= 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=NGtdJwD4; arc=none smtp.client-ip=209.85.214.182 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="NGtdJwD4" Received: by mail-pl1-f182.google.com with SMTP id d9443c01a7336-2068bee21d8so7903275ad.2 for ; Thu, 26 Sep 2024 02:29:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1727342983; x=1727947783; 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=LhqiIDQ5Jqu/fSndHOna+E70YcD1T5+jR0brWu5czp4=; b=NGtdJwD4mHXYbWYmQEyo7ok78zUOtpO+axlaDLXkajJJYzfprG1dReKutopXKn2Sk/ pHvpl6Da9+jnfERM9lcFHAtAzk/v09IX6i8LW9uNUi1vga//0PT9w+c5RRWko6BrOsih W5j2qlFlUOsjVu0BQWFm/VzzvjQjupLf/R2wQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727342983; x=1727947783; 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=LhqiIDQ5Jqu/fSndHOna+E70YcD1T5+jR0brWu5czp4=; b=DkrROk+fH1yOdUwswp35TFxbsHYRoQy7UotUT+KuWcG+5XwDLOfE0GfXvHpWYRTmJF ZSj5ar68p271mECGWHMmd5XRTcGWrH9pPvZ6y2dDLDL5eIzEiroQwABO9f+dLbNg0A+t CVpaKALE/BT13UC0ipFyYFxc2PXkU4rIZb8Tsly+PKSvtCroj0BvIdC35PCfcHB9H5Lm GccNwy8E8WJlwSZp0sKfyXU3awIlnZFjtN/I6NX2K6hm2x1CVEFhdGV8+MMUOVGTT8AN vvgoRCR5D+YZmLEupHC4J2IRl+8ekPhfn9+rWDFh83NpjjObCpEZnFNWKUXN9H/rvxko jMHA== X-Gm-Message-State: AOJu0YwTVd6DlmIM1qzIfOECO44cpK12CeYus488QBx1n8GDuWmbMBFY OyxPNIlz0tEiS1LMqvJGrCDXgBr1Hs1YGwJwLMAiGMQwwIdhhcjiMJ8yyxEJjw== X-Google-Smtp-Source: AGHT+IEdG39v0Vfwfch9vcjFuBKfPvx9YOlmD0blQWme8C0zQJMHMM2ZuXN87DCP03QyVmgMacA7Sw== X-Received: by 2002:a17:903:110f:b0:207:1737:2c66 with SMTP id d9443c01a7336-20afc4c127fmr79900895ad.35.1727342983478; Thu, 26 Sep 2024 02:29:43 -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.64.2024.09.26.02.29.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Sep 2024 02:29:43 -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 2/2] drm/bridge: it6505: Drop EDID cache on bridge power off Date: Thu, 26 Sep 2024 17:29:09 +0800 Message-ID: <20240926092931.3870342-3-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: 11feaef69d0c ("drm/bridge: it6505: Add caching for EDID") Signed-off-by: Pin-yen Lin Reviewed-by: Dmitry Baryshkov Reviewed-by: Douglas Anderson --- Changes in v2: - Collect review tags 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/i= te-it6505.c index 1e1c06fdf206..bb449efac2f4 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -3101,6 +3101,8 @@ static __maybe_unused int it6505_bridge_suspend(struc= t device *dev) { struct it6505 *it6505 =3D dev_get_drvdata(dev); =20 + it6505_remove_edid(it6505); + return it6505_poweroff(it6505); } =20 --=20 2.46.0.792.g87dc391469-goog