On Wed, Jan 27, 2021 at 03:39:44PM -0800, Eric Anholt wrote:
> We were using the same force-poweron bit in the two codepaths, so they
> could race to have one of them lose GPU power early.
>
> Signed-off-by: Eric Anholt <e...@anholt.net>
> Cc: sta...@vger.kernel.org # v5.9
You can add:
Fixes: 4b565ca5a2cb ("drm/msm: Add A6XX device support")
Because that was my ugly.
Reviewed-by: Jordan Crouse <jcro...@codeaurora.org>
> ---
> drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 25 ++++++++++++++++++++++---
> drivers/gpu/drm/msm/adreno/a6xx_gmu.h | 8 ++++++++
> drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 4 ++--
> 3 files changed, 32 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> index 78836b4fb98e..378dc7f190c3 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> @@ -264,6 +264,16 @@ int _a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum
> a6xx_gmu_oob_state state, char
> }
> name = "GPU_SET";
> break;
> + case GMU_OOB_PERFCOUNTER_SET:
> + if (gmu->legacy) {
> + request = GMU_OOB_PERFCOUNTER_REQUEST;
> + ack = GMU_OOB_PERFCOUNTER_ACK;
> + } else {
> + request = GMU_OOB_PERFCOUNTER_REQUEST_NEW;
> + ack = GMU_OOB_PERFCOUNTER_ACK_NEW;
> + }
> + name = "PERFCOUNTER";
> + break;
> case GMU_OOB_BOOT_SLUMBER:
> request = GMU_OOB_BOOT_SLUMBER_REQUEST;
> ack = GMU_OOB_BOOT_SLUMBER_ACK;
> @@ -302,9 +312,14 @@ int _a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum
> a6xx_gmu_oob_state state, char
> void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
> {
> if (!gmu->legacy) {
> - WARN_ON(state != GMU_OOB_GPU_SET);
> - gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
> - 1 << GMU_OOB_GPU_SET_CLEAR_NEW);
> + if (state == GMU_OOB_GPU_SET) {
> + gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
> + 1 << GMU_OOB_GPU_SET_CLEAR_NEW);
> + } else {
> + WARN_ON(state != GMU_OOB_PERFCOUNTER_SET);
> + gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
> + 1 << GMU_OOB_PERFCOUNTER_CLEAR_NEW);
> + }
> return;
> }
>
> @@ -313,6 +328,10 @@ void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum
> a6xx_gmu_oob_state state)
> gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
> 1 << GMU_OOB_GPU_SET_CLEAR);
> break;
> + case GMU_OOB_PERFCOUNTER_SET:
> + gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
> + 1 << GMU_OOB_PERFCOUNTER_CLEAR);
> + break;
> case GMU_OOB_BOOT_SLUMBER:
> gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
> 1 << GMU_OOB_BOOT_SLUMBER_CLEAR);
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> index c6d2bced8e5d..9fa278de2106 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
> @@ -156,6 +156,7 @@ enum a6xx_gmu_oob_state {
> GMU_OOB_BOOT_SLUMBER = 0,
> GMU_OOB_GPU_SET,
> GMU_OOB_DCVS_SET,
> + GMU_OOB_PERFCOUNTER_SET,
> };
>
> /* These are the interrupt / ack bits for each OOB request that are set
> @@ -190,6 +191,13 @@ enum a6xx_gmu_oob_state {
> #define GMU_OOB_GPU_SET_ACK_NEW 31
> #define GMU_OOB_GPU_SET_CLEAR_NEW 31
>
> +#define GMU_OOB_PERFCOUNTER_REQUEST 17
> +#define GMU_OOB_PERFCOUNTER_ACK 25
> +#define GMU_OOB_PERFCOUNTER_CLEAR 25
> +
> +#define GMU_OOB_PERFCOUNTER_REQUEST_NEW 28
> +#define GMU_OOB_PERFCOUNTER_ACK_NEW 30
> +#define GMU_OOB_PERFCOUNTER_CLEAR_NEW 30
>
> void a6xx_hfi_init(struct a6xx_gmu *gmu);
> int a6xx_hfi_start(struct a6xx_gmu *gmu, int boot_state);
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index c8a9010c1a1d..7424a70b9d35 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -1177,12 +1177,12 @@ static int a6xx_get_timestamp(struct msm_gpu *gpu,
> uint64_t *value)
> struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu);
>
> /* Force the GPU power on so we can read this register */
> - a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET);
> + a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_PERFCOUNTER_SET);
>
> *value = gpu_read64(gpu, REG_A6XX_RBBM_PERFCTR_CP_0_LO,
> REG_A6XX_RBBM_PERFCTR_CP_0_HI);
>
> - a6xx_gmu_clear_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET);
> + a6xx_gmu_clear_oob(&a6xx_gpu->gmu, GMU_OOB_PERFCOUNTER_SET);
> return 0;
> }
>
> --
> 2.30.0
>
--
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
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