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drm/msm: Add param for the highest bank bit

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This parameter is programmed by the kernel and influences the tiling
layout of images. Exposing it to userspace will allow it to tile/untile
images correctly without guessing what value the kernel programmed, and
allow us to change it in the future without breaking userspace.

Signed-off-by: Connor Abbott <cwabbott0@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/571181/
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Connor Abbott 2023-12-07 21:30:48 +00:00 committed by Rob Clark
parent 8814455a0e
commit 44a88fa456
2 changed files with 4 additions and 0 deletions
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3
drivers/gpu/drm/msm/adreno/adreno_gpu.c
View file

@ -373,6 +373,9 @@ int adreno_get_param(struct msm_gpu *gpu, struct msm_file_private *ctx,
return -EINVAL;
*value = ctx->aspace->va_size;
return 0;
case MSM_PARAM_HIGHEST_BANK_BIT:
*value = adreno_gpu->ubwc_config.highest_bank_bit;
return 0;
default:
DBG("%s: invalid param: %u", gpu->name, param);
return -EINVAL;

1
include/uapi/drm/msm_drm.h
View file

@ -86,6 +86,7 @@ struct drm_msm_timespec {
#define MSM_PARAM_CMDLINE 0x0d /* WO: override for task cmdline */
#define MSM_PARAM_VA_START 0x0e /* RO: start of valid GPU iova range */
#define MSM_PARAM_VA_SIZE 0x0f /* RO: size of valid GPU iova range (bytes) */
#define MSM_PARAM_HIGHEST_BANK_BIT 0x10 /* RO */
/* For backwards compat. The original support for preemption was based on
* a single ring per priority level so # of priority levels equals the #