drm/msm/dpu: Filter modes based on adjusted mode clock

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[ Upstream commit 62b7d68352 ]

Filter out modes that have a clock rate greater than the max core clock
rate when adjusted for the perf clock factor

This is especially important for chipsets such as QCS615 that have lower
limits for the MDP max core clock.

Since the core CRTC clock is at least the mode clock (adjusted for the
perf clock factor) [1], the modes supported by the driver should be less
than the max core clock rate.

[1] https://elixir.bootlin.com/linux/v6.12.4/source/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c#L83

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Jessica Zhang <jessica.zhang@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/652041/
Link: https://lore.kernel.org/r/20250506-filter-modes-v2-1-c20a0b7aa241@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Jessica Zhang 2025-05-06 18:38:39 -07:00 • committed by Greg Kroah-Hartman

parent 35b9336260

commit 8157d5f06b

3 changed files with 39 additions and 11 deletions

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35

drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c

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3

drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h

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12

drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c

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