From: Konrad Dybcio <konradybcio@kernel.org>
To: Rob Clark <robin.clark@oss.qualcomm.com>,
Dmitry Baryshkov <lumag@kernel.org>,
Abhinav Kumar <abhinav.kumar@linux.dev>,
Jessica Zhang <jesszhan0024@gmail.com>,
Sean Paul <sean@poorly.run>,
Marijn Suijten <marijn.suijten@somainline.org>,
David Airlie <airlied@gmail.com>,
Simona Vetter <simona@ffwll.ch>,
Rajendra Nayak <quic_rjendra@quicinc.com>,
Matthias Kaehlcke <mka@chromium.org>,
Sravanthi Kollukuduru <skolluku@codeaurora.org>,
Rajesh Yadav <ryadav@codeaurora.org>,
Chandan Uddaraju <chandanu@codeaurora.org>,
Jeykumar Sankaran <jsanka@codeaurora.org>,
Vara Reddy <quic_varar@quicinc.com>,
Stephen Boyd <swboyd@chromium.org>,
Guenter Roeck <groeck@chromium.org>,
Kuogee Hsieh <quic_khsieh@quicinc.com>,
Archit Taneja <architt@codeaurora.org>
Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org,
Tanmay Shah <tanmay@codeaurora.org>,
Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Subject: [PATCH 3/3] drm/msm/dsi: Drop dev_pm_opp_set_rate(0)
Date: Tue, 28 Jul 2026 15:20:47 +0200 [thread overview]
Message-ID: <20260728-topic-dpu_power-v1-3-e7783b859a70@oss.qualcomm.com> (raw)
In-Reply-To: <20260728-topic-dpu_power-v1-0-e7783b859a70@oss.qualcomm.com>
From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
dev_pm_opp_set_rate(0) removes the vote specified in required-opps but
does not actually park the clock, making it run without the necessary
power backing. Drop the explicit call to it.
Every call site of ops->link_clk_disable() is followed by
pm_runtime_put(), so the power vote will be rescinded if deemed safe.
Fixes: 32d3e0feccfe ("drm/msm: dsi: Use OPP API to set clk/perf state")
Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
---
drivers/gpu/drm/msm/dsi/dsi_host.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 59125d342fcb..7e4e3718b536 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -550,8 +550,6 @@ int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host)
void dsi_link_clk_disable_6g(struct msm_dsi_host *msm_host)
{
- /* Drop the performance state vote */
- dev_pm_opp_set_rate(&msm_host->pdev->dev, 0);
clk_disable_unprepare(msm_host->esc_clk);
clk_disable_unprepare(msm_host->pixel_clk);
clk_disable_unprepare(msm_host->byte_intf_clk);
--
2.55.0
next prev parent reply other threads:[~2026-07-28 13:21 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-28 13:20 [PATCH 0/3] Remove brownout risks from DPU Konrad Dybcio
2026-07-28 13:20 ` [PATCH 1/3] drm/msm/dpu: Drop sneaky dev_pm_opp_set_rate(0) Konrad Dybcio
2026-07-28 13:57 ` Dmitry Baryshkov
2026-07-28 16:40 ` Konrad Dybcio
2026-07-28 13:20 ` [PATCH 2/3] drm/msm/dp: Drop dev_pm_opp_set_rate(0) Konrad Dybcio
2026-07-28 13:56 ` Dmitry Baryshkov
2026-07-28 13:20 ` Konrad Dybcio [this message]
2026-07-28 13:55 ` [PATCH 3/3] drm/msm/dsi: " Dmitry Baryshkov
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