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From: Krzysztof Kozlowski <krzk@kernel.org>
To: Shawn Guo <shengchao.guo@oss.qualcomm.com>
Cc: Bjorn Andersson <andersson@kernel.org>,
	 Abel Vesa <abelvesa@kernel.org>, Stephen Boyd <sboyd@kernel.org>,
	 Brian Masney <bmasney+clk@redhat.com>,
	Jerome Brunet <jbrunet+clk@baylibre.com>,
	 Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	 Conor Dooley <conor+dt@kernel.org>,
	Konrad Dybcio <konradybcio@kernel.org>,
	 Taniya Das <taniya.das@oss.qualcomm.com>,
	Jagadeesh Kona <quic_jkona@quicinc.com>,
	 Bryan O'Donoghue <bryan.odonoghue@linaro.org>,
	linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
	 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: clock: qcom,sm8450-videocc: Fix clock inputs for Glymur
Date: Tue, 29 Sep 2026 09:57:40 +0200	[thread overview]
Message-ID: <20260929-visionary-hospitable-beaver-e2c1a5@quoll> (raw)
In-Reply-To: <20260924161152.1162301-2-shengchao.guo@oss.qualcomm.com>

On Fri, Sep 25, 2026 at 12:11:50AM +0800, Shawn Guo wrote:
> The schema describes exactly two clock inputs for every compatible it
> covers, a board XO and a video AHB clock from GCC. That is only true
> for part of the drivers bound to these compatibles. videocc-glymur.c,
> which handles qcom,glymur-videocc and qcom,nord-videocc, and
> videocc-sm8750.c both declare their DT inputs as DT_BI_TCXO,
> DT_BI_TCXO_AO and DT_SLEEP_CLK, and parent video_cc_sleep_clk_src on
> DT_SLEEP_CLK.

I don't understand what you are saying here. You are mixing drivers and
compatibles.

> 
> Because the schema stops at two items, no device tree can supply the
> third input, so video_cc_sleep_clk_src can never resolve its parent
> and registers as an orphan clock. It also documents the second input
> as an AHB clock, which no device tree using these two drivers passes,
> and which those drivers would interpret as the always-on XO.
> 
> Describe three inputs for the Glymur, Nord and SM8750 compatibles,
> keeping the existing two-input description for the rest. The sibling
> qcom,glymur-evacc.yaml, whose driver has the same shape, already
> documents a sleep clock this way.
> 
> Fixes: ed9ca8296147 ("dt-bindings: clock: qcom: Add video clock controller on Glymur SoC")
> Fixes: b190eaea5780 ("dt-bindings: clock: qcom: Add SM8750 video clock controller")

Are you sure that you are not reverting review like it happened this
week in IPQ? You know, the trick with reverting maintainer's review I
mentioned on DT IRC?

Best regards,
Krzysztof


  reply	other threads:[~2026-09-29  7:57 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-24 16:11 [PATCH 0/3] qcom: videocc: Fix sleep clock on Glymur/SM8750 Shawn Guo
2026-09-24 16:11 ` [PATCH 1/3] dt-bindings: clock: qcom,sm8450-videocc: Fix clock inputs for Glymur Shawn Guo
2026-09-29  7:57   ` Krzysztof Kozlowski [this message]
2026-09-29 14:08     ` Shawn Guo
2026-09-24 16:11 ` [PATCH 2/3] arm64: dts: qcom: glymur: Add videocc sleep clock Shawn Guo
2026-09-25  9:48   ` Abel Vesa
2026-09-25 15:35     ` Shawn Guo
2026-09-25 15:49   ` Jagadeesh Kona
2026-09-26  0:18     ` Shawn Guo
2026-09-24 16:11 ` [PATCH 3/3] arm64: dts: qcom: sm8750: Fix videocc clock inputs Shawn Guo
2026-09-25  9:47   ` Abel Vesa
2026-09-25 15:29     ` Shawn Guo
2026-09-29  8:06       ` Krzysztof Kozlowski

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