diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c index 45a38b247727..765c1c087c76 100644 --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c @@ -15,6 +15,7 @@ #include "msm_iommu.h" #include "msm_trace.h" #include "a5xx_gpu.h" +#include #define SECURE_VA_START 0xc0000000 #define SECURE_VA_SIZE SZ_256M @@ -1169,6 +1170,17 @@ static int a5xx_pm_resume(struct msm_gpu *gpu) { int ret; + /* + * Between suspend/resumes the GPU clocks need to be turned off + * but not a complete power down, typically between frames. Set the + * memory retention flags on the GPU core clock to retain memory + * across clock toggles. + */ + if (gpu->core_clk) { + clk_set_flags(gpu->core_clk, CLKFLAG_RETAIN_PERIPH); + clk_set_flags(gpu->core_clk, CLKFLAG_RETAIN_MEM); + } + /* Turn on the core power */ ret = msm_gpu_pm_resume(gpu); if (ret) @@ -1208,6 +1220,12 @@ static int a5xx_pm_suspend(struct msm_gpu *gpu) { struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu); + /* Turn off the memory retention flag when not necessary */ + if (gpu->core_clk) { + clk_set_flags(gpu->core_clk, CLKFLAG_NORETAIN_PERIPH); + clk_set_flags(gpu->core_clk, CLKFLAG_NORETAIN_MEM); + } + /* Only do this next bit if we are about to go down */ if (gpu->active_cnt == 1) { /* Clear the VBIF pipe before shutting down */ diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index 5f9d8ef365da..7c109fdab545 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -863,7 +863,14 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev, gpu->dev = drm; gpu->funcs = funcs; gpu->name = name; - gpu->inactive = true; + /* + * Set the inactive flag to false, so that when the retire worker + * kicks in from the init path, it knows that it has to turn off the + * clocks. This should be fine to do since this is the init sequence + * and we have an init_lock in msm_open() to protect against bad things + * from happening. + */ + gpu->inactive = false; INIT_LIST_HEAD(&gpu->active_list); INIT_WORK(&gpu->retire_work, retire_worker);