From 6ed95285382d6f90a3c3a11d5806a5eb7db715c3 Mon Sep 17 00:00:00 2001 From: Vladimir Lypak Date: Sun, 12 Dec 2021 16:03:17 +0000 Subject: [PATCH] drm/msm/a5xx: Fix missing CP_PROTECT for SMMU on A540 A CP_PROTECT entry for SMMU registers is missing for A540. According to downstream sources its length is same as on A530 - 0x20000 bytes. On all other revisions SMMU region length is 0x10000 bytes. Despite this, we setup region of length 0x20000 on all revisions. This doesn't cause any issues on those GPUs. As for preventing accesses to the region from protected mode it was tested to work the same. This patch drops the "if" condition in setup of CP_PROTECT entry because it already includes all supported revisions except A540. Signed-off-by: Vladimir Lypak Link: https://lore.kernel.org/r/20211212160333.980343-2-vladimir.lypak@gmail.com Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c index e3f25be4e170..3d28fcf841a6 100644 --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c @@ -858,10 +858,8 @@ static int a5xx_hw_init(struct msm_gpu *gpu) /* UCHE */ gpu_write(gpu, REG_A5XX_CP_PROTECT(16), ADRENO_PROTECT_RW(0xE80, 16)); - if (adreno_is_a506(adreno_gou) || adreno_is_a508(adreno_gpu) || - adreno_is_a509(adreno_gpu) || adreno_is_a510(adreno_gpu) || - adreno_is_a512(adreno_gpu) || adreno_is_a530(adreno_gpu)) - gpu_write(gpu, REG_A5XX_CP_PROTECT(17), + /* SMMU */ + gpu_write(gpu, REG_A5XX_CP_PROTECT(17), ADRENO_PROTECT_RW(0x10000, 0x8000)); gpu_write(gpu, REG_A5XX_RBBM_SECVID_TSB_CNTL, 0);