Re: [PATCH v2 05/14] drm/msm/adreno: Disable has_cached_coherent for A610/A619_holi

[Dmitry Baryshkov]

On 14/02/2023 19:31, Konrad Dybcio wrote:
> These SKUs don't support the feature. Disable it to make the GPU stop
> crashing after almost each and every submission - the received data on
> the GPU end was simply incomplete in garbled, resulting in almost nothing
> being executed properly.
>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> ---
>   drivers/gpu/drm/msm/adreno/adreno_device.c | 8 +++++++-
>   1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
> index 36f062c7582f..82757f005a1a 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_device.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
> @@ -540,7 +540,13 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
>   		config.rev.minor, config.rev.patchid);
>   
>   	priv->is_a2xx = config.rev.core == 2;
> -	priv->has_cached_coherent = config.rev.core >= 6;
> +
> +	if (config.rev.core >= 6) {
> +		/* Exclude A610 and A619_holi */
> +		if (!(adreno_cmp_rev(ADRENO_REV(6, 1, 0, ANY_ID), config.rev) ||
> +		      adreno_cmp_rev(ADRENO_REV(6, 1, 9, 1), config.rev)))
> +			priv->has_cached_coherent = true;
> +	}

I'd suggest something like:

if (config.rev.core >= 6 &&
    !(info.quirks & ADRENO_QUIRK_NO_CACHE_COHERENT))
        priv->has_cache_coherent = true;

Let's keep all the information and quirks in a single place.

>   
>   	gpu = info->init(drm);
>   	if (IS_ERR(gpu)) {

--
With best wishes
Dmitry