linux-kernel - [PATCH 1/2] clk: qcom: mmcc-sdm660: fix stuck video

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Message-Id: <20250315-clock-fix-v1-1-2efdc4920dda@mainlining.org>
Date: Sat, 15 Mar 2025 16:26:17 +0100
From: Barnabás Czémán <barnabas.czeman@...nlining.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Martin Botka <martin.botka@...ainline.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>, 
 Adam Skladowski <a_skl39@...tonmail.com>, 
 Sireesh Kodali <sireeshkodali@...tonmail.com>, 
 Vladimir Lypak <junak.pub@...il.com>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Barnabás Czémán <barnabas.czeman@...nlining.org>
Subject: [PATCH 1/2] clk: qcom: mmcc-sdm660: fix stuck video_subcore0 clock

This clock can't be enable with VENUS_CORE0 GDSC turned off. But that
GDSC is under HW control so it can be turned off at any moment.
Instead of checking the dependent clock we can just vote for it to
enable later when GDSC gets turned on.

Fixes: 5db3ae8b33de6 ("clk: qcom: Add SDM660 Multimedia Clock Controller (MMCC) driver")
Signed-off-by: Barnabás Czémán <barnabas.czeman@...nlining.org>
---
 drivers/clk/qcom/mmcc-sdm660.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/qcom/mmcc-sdm660.c b/drivers/clk/qcom/mmcc-sdm660.c
index e5bdcc75a36ed24a8c72d1fd6ee57083a7f5c499..e69fc65b13da2b519af413137353693473ee258a 100644
--- a/drivers/clk/qcom/mmcc-sdm660.c
+++ b/drivers/clk/qcom/mmcc-sdm660.c
@@ -2540,7 +2540,7 @@ static struct clk_branch video_core_clk = {
 
 static struct clk_branch video_subcore0_clk = {
 	.halt_reg = 0x1048,
-	.halt_check = BRANCH_HALT,
+	.halt_check = BRANCH_HALT_SKIP,
 	.clkr = {
 		.enable_reg = 0x1048,
 		.enable_mask = BIT(0),

-- 
2.48.1