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Subject[PATCH 5.8 145/177] drm/msm: Disable the RPTR shadow
Date
From: Jordan Crouse <jcrouse@codeaurora.org>

commit f6828e0c4045f03f9cf2df6c2a768102641183f4 upstream.

Disable the RPTR shadow across all targets. It will be selectively
re-enabled later for targets that need it.

Cc: stable@vger.kernel.org
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/msm/adreno/a2xx_gpu.c | 5 +++++
drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 10 ++++++++++
drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 10 ++++++++++
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 11 +++++++++--
drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 7 +++++++
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 27 ++-------------------------
6 files changed, 43 insertions(+), 27 deletions(-)

--- a/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
@@ -164,6 +164,11 @@ static int a2xx_hw_init(struct msm_gpu *
if (ret)
return ret;

+ gpu_write(gpu, REG_AXXX_CP_RB_CNTL,
+ MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
+ gpu_write(gpu, REG_AXXX_CP_RB_BASE, lower_32_bits(gpu->rb[0]->iova));
+
/* NOTE: PM4/micro-engine firmware registers look to be the same
* for a2xx and a3xx.. we could possibly push that part down to
* adreno_gpu base class. Or push both PM4 and PFP but
--- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
@@ -211,6 +211,16 @@ static int a3xx_hw_init(struct msm_gpu *
if (ret)
return ret;

+ /*
+ * Use the default ringbuffer size and block size but disable the RPTR
+ * shadow
+ */
+ gpu_write(gpu, REG_AXXX_CP_RB_CNTL,
+ MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
+ /* Set the ringbuffer address */
+ gpu_write(gpu, REG_AXXX_CP_RB_BASE, lower_32_bits(gpu->rb[0]->iova));
+
/* setup access protection: */
gpu_write(gpu, REG_A3XX_CP_PROTECT_CTRL, 0x00000007);

--- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
@@ -267,6 +267,16 @@ static int a4xx_hw_init(struct msm_gpu *
if (ret)
return ret;

+ /*
+ * Use the default ringbuffer size and block size but disable the RPTR
+ * shadow
+ */
+ gpu_write(gpu, REG_A4XX_CP_RB_CNTL,
+ MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
+ /* Set the ringbuffer address */
+ gpu_write(gpu, REG_A4XX_CP_RB_BASE, lower_32_bits(gpu->rb[0]->iova));
+
/* Load PM4: */
ptr = (uint32_t *)(adreno_gpu->fw[ADRENO_FW_PM4]->data);
len = adreno_gpu->fw[ADRENO_FW_PM4]->size / 4;
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -702,8 +702,6 @@ static int a5xx_hw_init(struct msm_gpu *
if (ret)
return ret;

- a5xx_preempt_hw_init(gpu);
-
if (!adreno_is_a510(adreno_gpu))
a5xx_gpmu_ucode_init(gpu);

@@ -711,6 +709,15 @@ static int a5xx_hw_init(struct msm_gpu *
if (ret)
return ret;

+ /* Set the ringbuffer address */
+ gpu_write64(gpu, REG_A5XX_CP_RB_BASE, REG_A5XX_CP_RB_BASE_HI,
+ gpu->rb[0]->iova);
+
+ gpu_write(gpu, REG_A5XX_CP_RB_CNTL,
+ MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
+ a5xx_preempt_hw_init(gpu);
+
/* Disable the interrupts through the initial bringup stage */
gpu_write(gpu, REG_A5XX_RBBM_INT_0_MASK, A5XX_INT_MASK);

--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -557,6 +557,13 @@ static int a6xx_hw_init(struct msm_gpu *
if (ret)
goto out;

+ /* Set the ringbuffer address */
+ gpu_write64(gpu, REG_A6XX_CP_RB_BASE, REG_A6XX_CP_RB_BASE_HI,
+ gpu->rb[0]->iova);
+
+ gpu_write(gpu, REG_A6XX_CP_RB_CNTL,
+ MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
/* Always come up on rb 0 */
a6xx_gpu->cur_ring = gpu->rb[0];

--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -400,26 +400,6 @@ int adreno_hw_init(struct msm_gpu *gpu)
ring->memptrs->rptr = 0;
}

- /*
- * Setup REG_CP_RB_CNTL. The same value is used across targets (with
- * the excpetion of A430 that disables the RPTR shadow) - the cacluation
- * for the ringbuffer size and block size is moved to msm_gpu.h for the
- * pre-processor to deal with and the A430 variant is ORed in here
- */
- adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_CNTL,
- MSM_GPU_RB_CNTL_DEFAULT |
- (adreno_is_a430(adreno_gpu) ? AXXX_CP_RB_CNTL_NO_UPDATE : 0));
-
- /* Setup ringbuffer address - use ringbuffer[0] for GPU init */
- adreno_gpu_write64(adreno_gpu, REG_ADRENO_CP_RB_BASE,
- REG_ADRENO_CP_RB_BASE_HI, gpu->rb[0]->iova);
-
- if (!adreno_is_a430(adreno_gpu)) {
- adreno_gpu_write64(adreno_gpu, REG_ADRENO_CP_RB_RPTR_ADDR,
- REG_ADRENO_CP_RB_RPTR_ADDR_HI,
- rbmemptr(gpu->rb[0], rptr));
- }
-
return 0;
}

@@ -427,11 +407,8 @@ int adreno_hw_init(struct msm_gpu *gpu)
static uint32_t get_rptr(struct adreno_gpu *adreno_gpu,
struct msm_ringbuffer *ring)
{
- if (adreno_is_a430(adreno_gpu))
- return ring->memptrs->rptr = adreno_gpu_read(
- adreno_gpu, REG_ADRENO_CP_RB_RPTR);
- else
- return ring->memptrs->rptr;
+ return ring->memptrs->rptr = adreno_gpu_read(
+ adreno_gpu, REG_ADRENO_CP_RB_RPTR);
}

struct msm_ringbuffer *adreno_active_ring(struct msm_gpu *gpu)

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