From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 A8A831C3BFC; Wed, 20 May 2026 17:40:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779298829; cv=none; b=Uow0mZuQR6ZT5KfNSxA4nloutG99o5YbD8S3FVz0H+BMhfQG/vFvJaylH+YInzxnepugOCJ55QDzCvL6NRF11QCaE52GCx/CvM0IFaC/BSUOyQLbBtNyTUoxcX2f3gEPQQ6w7u8XMLIvnjeysGUz5SD4KA21fi/oNyXZdYK/D+4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779298829; c=relaxed/simple; bh=fUWAokZ6icpE2Ts59BewdhzTJGYI3ZLYqEUX9cULMNw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=og/dNrrjAPL605EhLkIzoY6eeQQdUKPEs64EdcGY9HbXHDBDdHl90Dv4wcw2LpFVnoYHhYWQVdT7wQFvn06f39c0eMD2ZZWMOOoXMEdBvC6R1z+siivA3eJ8bmw7zyBKx3EnGBpJ37Eywxvk2lX0n5+kk3cVxMOOrW+pxRrbarU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Tj3hYDKG; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Tj3hYDKG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19C211F000E9; Wed, 20 May 2026 17:40:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1779298827; bh=ClIRSmpi8EhmqXlL8eHiY+74H/hj/3iWmbY12XSlp70=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Tj3hYDKG1HNG09FUBk5TNWuaDtR/fUtC9nxjubAXAHenXRZ+GaovE+0czk/uV6Tix jWbuoxLTsZQJsjtMPP/m2VxJ9LZgdMd0ECDspnkPQM5a7IkD6MHwDz7dO5WV9KyQY3 7DarM0BnKMeKtUe4HPeQ2/3Nq34pzXkqMwAPVMFs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Konrad Dybcio , Dmitry Baryshkov , Bjorn Andersson , Sasha Levin Subject: [PATCH 6.18 558/957] clk: qcom: dispcc[01]-sa8775p: Fix DSI byte clock rate setting Date: Wed, 20 May 2026 18:17:21 +0200 Message-ID: <20260520162146.633475350@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260520162134.554764788@linuxfoundation.org> References: <20260520162134.554764788@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Konrad Dybcio [ Upstream commit 2851b6c6a42e22c243aa4cd606a49e2b9acfb6d6 ] The clock tree for byte_clk_src is as follows: ┌──────byte0_clk_src─────┐ │ │ byte0_clk byte0_div_clk_src │ byte0_intf_clk If both of its direct children have CLK_SET_RATE_PARENT with different requests, byte0_clk_src (and its parent) will be reconfigured. In this case, byte0_intf should strictly follow the rate of byte0_clk (with some adjustments based on PHY mode). Remove CLK_SET_RATE_PARENT from byte0_div_clk_src to avoid this issue. Fixes: e700bfd2f976 ("clk: qcom: Add support for Display clock Controllers on SA8775P") Signed-off-by: Konrad Dybcio Reviewed-by: Dmitry Baryshkov Link: https://lore.kernel.org/r/20260304-topic-dsi_byte_fixup-v1-5-b79b29f83176@oss.qualcomm.com Signed-off-by: Bjorn Andersson Signed-off-by: Sasha Levin --- drivers/clk/qcom/dispcc0-sa8775p.c | 2 -- drivers/clk/qcom/dispcc1-sa8775p.c | 2 -- 2 files changed, 4 deletions(-) diff --git a/drivers/clk/qcom/dispcc0-sa8775p.c b/drivers/clk/qcom/dispcc0-sa8775p.c index aeda9cf4bfee8..b248fa9705873 100644 --- a/drivers/clk/qcom/dispcc0-sa8775p.c +++ b/drivers/clk/qcom/dispcc0-sa8775p.c @@ -591,7 +591,6 @@ static struct clk_regmap_div mdss_0_disp_cc_mdss_byte0_div_clk_src = { &mdss_0_disp_cc_mdss_byte0_clk_src.clkr.hw, }, .num_parents = 1, - .flags = CLK_SET_RATE_PARENT, .ops = &clk_regmap_div_ops, }, }; @@ -606,7 +605,6 @@ static struct clk_regmap_div mdss_0_disp_cc_mdss_byte1_div_clk_src = { &mdss_0_disp_cc_mdss_byte1_clk_src.clkr.hw, }, .num_parents = 1, - .flags = CLK_SET_RATE_PARENT, .ops = &clk_regmap_div_ops, }, }; diff --git a/drivers/clk/qcom/dispcc1-sa8775p.c b/drivers/clk/qcom/dispcc1-sa8775p.c index cd55d1c119024..9882edbb79f9e 100644 --- a/drivers/clk/qcom/dispcc1-sa8775p.c +++ b/drivers/clk/qcom/dispcc1-sa8775p.c @@ -591,7 +591,6 @@ static struct clk_regmap_div mdss_1_disp_cc_mdss_byte0_div_clk_src = { &mdss_1_disp_cc_mdss_byte0_clk_src.clkr.hw, }, .num_parents = 1, - .flags = CLK_SET_RATE_PARENT, .ops = &clk_regmap_div_ops, }, }; @@ -606,7 +605,6 @@ static struct clk_regmap_div mdss_1_disp_cc_mdss_byte1_div_clk_src = { &mdss_1_disp_cc_mdss_byte1_clk_src.clkr.hw, }, .num_parents = 1, - .flags = CLK_SET_RATE_PARENT, .ops = &clk_regmap_div_ops, }, }; -- 2.53.0