diff options
| author | Akhil P Oommen <quic_akhilpo@quicinc.com> | 2022-08-19 01:52:13 +0530 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2022-08-28 09:29:27 -0700 |
| commit | 1f6cca404918d2d3bc476afb31b371a406009c06 (patch) | |
| tree | b783ec53c681b5e2e62552c3dced09058364dd2a /drivers/gpu/drm/msm/msm_gpu.c | |
| parent | f350bfb92b5a89f8056b0e218e05522665e8ac9a (diff) | |
drm/msm/a6xx: Ensure CX collapse during gpu recovery
Because there could be transient votes from other drivers/tz/hyp which
may keep the cx gdsc enabled, we should poll until cx gdsc collapses.
We can use the reset framework to poll for cx gdsc collapse from gpucc
clk driver.
This feature requires support from the platform's gpucc driver.
Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Patchwork: https://patchwork.freedesktop.org/patch/498397/
Link: https://lore.kernel.org/r/20220819015030.v5.5.I176567525af2b9439a7e485d0ca130528666a55c@changeid
Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gpu.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_gpu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index 9ec9a99ffe77..0098ee8438aa 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -16,6 +16,7 @@ #include <generated/utsrelease.h> #include <linux/string_helpers.h> #include <linux/devcoredump.h> +#include <linux/reset.h> #include <linux/sched/task.h> /* @@ -903,6 +904,9 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, if (IS_ERR(gpu->gpu_cx)) gpu->gpu_cx = NULL; + gpu->cx_collapse = devm_reset_control_get_optional_exclusive(&pdev->dev, + "cx_collapse"); + gpu->pdev = pdev; platform_set_drvdata(pdev, &gpu->adreno_smmu); |