linux-kernel - Re: [PATCH 5/5] drm/panfrost: add Amlogic GPU integration quirks

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Date:   Tue, 8 Sep 2020 15:11:19 -0400
From:   Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     robh@...nel.org, tomeu.vizoso@...labora.com, steven.price@....com,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH 5/5] drm/panfrost: add Amlogic GPU integration quirks

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>
> This adds the required GPU quirks, including the quirk in the PWR registers at the GPU
> reset time and the IOMMU quirk for shareability issues observed on G52 in Amlogic G12B SoCs.
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  drivers/gpu/drm/panfrost/panfrost_drv.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index 36463c89e966..efde5e2acc35 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -656,7 +656,25 @@ static const struct panfrost_compatible default_data = {
>  	.pm_domain_names = NULL,
>  };
>  
> +static const struct panfrost_compatible amlogic_gxm_data = {
> +	.num_supplies = ARRAY_SIZE(default_supplies),
> +	.supply_names = default_supplies,
> +	.vendor_reset_quirk = panfrost_gpu_amlogic_reset_quirk,
> +};
> +
> +static const struct panfrost_compatible amlogic_g12a_data = {
> +	.num_supplies = ARRAY_SIZE(default_supplies),
> +	.supply_names = default_supplies,
> +	.vendor_reset_quirk = panfrost_gpu_amlogic_reset_quirk,
> +	.pgtbl_quirks = IO_PGTABLE_QUIRK_ARM_BROKEN_SH,
> +};
> +
>  static const struct of_device_id dt_match[] = {
> +	/* Set first to probe before the generic compatibles */
> +	{ .compatible = "amlogic,meson-gxm-mali",
> +	  .data = &amlogic_gxm_data, },
> +	{ .compatible = "amlogic,meson-g12a-mali",
> +	  .data = &amlogic_g12a_data, },
>  	{ .compatible = "arm,mali-t604", .data = &default_data, },
>  	{ .compatible = "arm,mali-t624", .data = &default_data, },
>  	{ .compatible = "arm,mali-t628", .data = &default_data, },
> -- 
> 2.22.0
> 

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