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drm/msm/a6xx: Skip empty protection ranges entries

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Some specific SKUs leave certain protection range registers empty.
Allow for that behavior.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/543334/
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Konrad Dybcio
2023-06-20 13:10:38 +02:00
committed by Rob Clark
parent 02a726fc6b
commit 29af760545
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/msm/adreno/a6xx_gpu.c
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@@ -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]);
}