[PATCH 04/12] drm/msm/a8xx: Allow nonctx reglist to include GMU regs
From: Rob Clark
Date: Tue Oct 20 2026 - 16:51:39 EST
>From hw PoV, it's all part of the GPU. But from dt perspective it is
it's own device with a separate io space. So we need to detect this and
direct writes to the correct place.
Signed-off-by: Rob Clark <robin.clark@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/msm/adreno/a8xx_gpu.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c
index 72c84f73157a..3e22ef788f2d 100644
--- a/drivers/gpu/drm/msm/adreno/a8xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a8xx_gpu.c
@@ -376,6 +376,7 @@ static void a8xx_set_ubwc_config(struct msm_gpu *gpu)
static void a8xx_nonctxt_config(struct msm_gpu *gpu, u32 *gmem_protect)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
+ struct a6xx_gmu *gmu = &to_a6xx_gpu(adreno_gpu)->gmu;
const struct a6xx_info *info = adreno_gpu->info->a6xx;
const struct adreno_reglist_pipe *regs = info->nonctxt_reglist;
unsigned int pipe_id, i;
@@ -395,7 +396,11 @@ static void a8xx_nonctxt_config(struct msm_gpu *gpu, u32 *gmem_protect)
if (regs[i].offset == REG_A8XX_RB_GC_GMEM_PROTECT)
*gmem_protect = regs[i].value;
- gpu_write(gpu, regs[i].offset, regs[i].value);
+ if ((regs[i].offset << 2) >= gmu->mmio_offset) {
+ gmu_write(gmu, regs[i].offset, regs[i].value);
+ } else {
+ gpu_write(gpu, regs[i].offset, regs[i].value);
+ }
}
a8xx_aperture_release(gpu, flags);
--
2.56.0