lkml.org 
[lkml]   [2023]   [Jun]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Date
Subject[PATCH v3 3/6] drm/msm/a6xx: Skip empty protection ranges entries
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 --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]);
}
--
2.41.0

\
 
 \ /
  Last update: 2023-06-19 18:44    [W:0.079 / U:1.312 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site