[PATCH 3/3] drm/msm/a5xx: add devcoredump support to the fault handler

[Dmitry Baryshkov]

Use adreno_fault_handler() to implement a5xx_fault_handler(). This
enables devcoredump support on a5xx platforms, allowing one to capture
the crashed GPU state at the time of context fault.

Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
 drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c 
b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index b5270324f5f8..d38ebfb5965b 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -1099,16 +1099,19 @@ bool a5xx_idle(struct msm_gpu *gpu, struct 
msm_ringbuffer *ring)
 static int a5xx_fault_handler(void *arg, unsigned long iova, int flags, void 
*data)
 {
        struct msm_gpu *gpu = arg;
-       pr_warn_ratelimited("*** gpu fault: iova=%08lx, flags=%d 
(%u,%u,%u,%u)\n",
-                       iova, flags,
+       struct adreno_smmu_fault_info *info = data;
+       char block[12] = "unknown";
+       u32 scratch[] = {
                        gpu_read(gpu, REG_A5XX_CP_SCRATCH_REG(4)),
                        gpu_read(gpu, REG_A5XX_CP_SCRATCH_REG(5)),
                        gpu_read(gpu, REG_A5XX_CP_SCRATCH_REG(6)),
-                       gpu_read(gpu, REG_A5XX_CP_SCRATCH_REG(7)));
+                       gpu_read(gpu, REG_A5XX_CP_SCRATCH_REG(7)),
+       };
 
-       gpu->aspace->mmu->funcs->resume_translation(gpu->aspace->mmu);
+       if (info)
+               snprintf(block, sizeof(block), "%x", info->fsynr1);
 
-       return 0;
+       return adreno_fault_handler(gpu, iova, flags, info, block, scratch);
 }
 
 static void a5xx_cp_err_irq(struct msm_gpu *gpu)
-- 
2.30.2