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drm/msm/devfreq: Restrict idle clamping to a618 for now

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Until we better understand the stability issues caused by frequent
frequency changes, lets limit them to a618.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Tested-by: Caleb Connolly <caleb.connolly@linaro.org>
Link: https://lore.kernel.org/r/20211018153627.2787882-1-robdclark@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark 2021-10-18 08:36:25 -07:00
parent c8f01ffc83
commit 5ca6779d2f
3 changed files with 13 additions and 1 deletions
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7
drivers/gpu/drm/msm/adreno/a6xx_gpu.c
View File

@ -1838,6 +1838,13 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
adreno_cmp_rev(ADRENO_REV(6, 3, 5, ANY_ID), info->rev)))
adreno_gpu->base.hw_apriv = true;
/*
* For now only clamp to idle freq for devices where this is known not
* to cause power supply issues:
*/
if (info && (info->revn == 618))
gpu->clamp_to_idle = true;
a6xx_llc_slices_init(pdev, a6xx_gpu);
ret = a6xx_set_supported_hw(&pdev->dev, config->rev);

4
drivers/gpu/drm/msm/msm_gpu.h
View File

@ -203,6 +203,10 @@ struct msm_gpu {
uint32_t suspend_count;
struct msm_gpu_state *crashstate;
/* Enable clamping to idle freq when inactive: */
bool clamp_to_idle;
/* True if the hardware supports expanded apriv (a650 and newer) */
bool hw_apriv;

3
drivers/gpu/drm/msm/msm_gpu_devfreq.c
View File

@ -200,7 +200,8 @@ void msm_devfreq_idle(struct msm_gpu *gpu)
idle_freq = get_freq(gpu);
msm_devfreq_target(&gpu->pdev->dev, &target_freq, 0);
if (gpu->clamp_to_idle)
msm_devfreq_target(&gpu->pdev->dev, &target_freq, 0);
df->idle_time = ktime_get();
df->idle_freq = idle_freq;