Re: [PATCH] drm/msm/a6xx+: Increase GMU FW init timeout

[Akhil P Oommen]

On 9/12/2026 8:39 PM, Rob Clark wrote:
> We were using 10ms, kgsl uses 100ms.  In practice it is usually takes
> less than 10ms, but very occasionally goes a bit above 10ms, leading to
> a "GMU firmware inialization timed out", from which point things go
> south.
> 
> There are probably some things that could be done to speed up init, like
> increasing GMU freq.  But to be safe, increase the timeout to match
> kgsl.
> 
> Signed-off-by: Rob Clark <robin.clark@xxxxxxxxxxxxxxxx>

Reviewed-by: Akhil P Oommen <akhilpo@xxxxxxxxxxxxxxxx>

-Akhil

> ---
>  drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> index 2170bf7bb045..9290010c8cdd 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
> @@ -320,7 +320,7 @@ static int a6xx_gmu_start(struct a6xx_gmu *gmu)
>  	gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 0);
>  
>  	ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, val,
> -		(val & mask) == reset_val, 100, 10000);
> +		(val & mask) == reset_val, 100, 100000);
>  
>  	if (ret)
>  		DRM_DEV_ERROR(gmu->dev, "GMU firmware initialization timed out\n");