On 8.01.2025 9:40 PM, Akhil P Oommen wrote:
> Add a module param to disable ACD which will help to quickly rule it
> out for any GPU issues.
>
> Signed-off-by: Akhil P Oommen <quic_akhi...@quicinc.com>
> ---
> drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 7 +++++++
> drivers/gpu/drm/msm/adreno/adreno_device.c | 4 ++++
> 2 files changed, 11 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> index 1f213a0fc61b..ce08eed572c8 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> @@ -1475,6 +1475,13 @@ static int a6xx_gmu_acd_probe(struct a6xx_gmu *gmu)
> struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
> struct msm_gpu *gpu = &adreno_gpu->base;
> int ret, i, cmd_idx = 0;
> + extern bool disable_acd;
> +
> + /* Skip ACD probe if requested via module param */
> + if (disable_acd) {
> + DRM_DEV_ERROR(gmu->dev, "Skipping GPU ACD probe\n");
> + return 0;
> + }
>
> cmd->version = 1;
> cmd->stride = 1;
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c
> b/drivers/gpu/drm/msm/adreno/adreno_device.c
> index 236b25c094cd..f4552b8c6767 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_device.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
> @@ -24,6 +24,10 @@ int enable_preemption = -1;
> MODULE_PARM_DESC(enable_preemption, "Enable preemption (A7xx only) (1=on ,
> 0=disable, -1=auto (default))");
> module_param(enable_preemption, int, 0600);
>
> +bool disable_acd;
> +MODULE_PARM_DESC(disable_acd, "Forcefully disable GPU ACD");
> +module_param_unsafe(disable_acd, bool, 0600);
IIUC 0600 makes it sysfs-writeable, which we don't want, as it takes
effect during probe (meaning booting with =0 and writing 1 later on
has no effect)
Konrad
