diff mbox series

[v3,3/6] drm/msm/a6xx: Skip empty protection ranges entries

Message ID 20230517-topic-a7xx_prep-v3-3-a3ce3725385b@linaro.org
State Accepted
Commit 29af7605453797b9b58c3369314bd5710f5ea2ba
Headers show
Series [v3,1/6] drm/msm/a6xx: Add some missing header definitions | expand

Commit Message

Konrad Dybcio June 19, 2023, 4:44 p.m. UTC 
Some specific SKUs leave certain protection range registers empty.
Allow for that behavior.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index cd0c9bccdc19..488c69cf08d3 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -935,8 +935,11 @@  static void a6xx_set_cp_protect(struct msm_gpu *gpu)
 		  A6XX_CP_PROTECT_CNTL_ACCESS_FAULT_ON_VIOL_EN |
 		  A6XX_CP_PROTECT_CNTL_LAST_SPAN_INF_RANGE);
 
-	for (i = 0; i < count - 1; i++)
-		gpu_write(gpu, REG_A6XX_CP_PROTECT(i), regs[i]);
+	for (i = 0; i < count - 1; i++) {
+		/* Intentionally skip writing to some registers */
+		if (regs[i])
+			gpu_write(gpu, REG_A6XX_CP_PROTECT(i), regs[i]);
+	}
 	/* last CP_PROTECT to have "infinite" length on the last entry */
 	gpu_write(gpu, REG_A6XX_CP_PROTECT(count_max - 1), regs[i]);
 }