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SubjectRe: [PATCH 2/5] drm/panfrost: add support specifying pgtbl quirks
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On 08/09/2020 16:18, Neil Armstrong wrote:
> Add a pgtbl_quirks entry in the compatible specific table to permit specyfying IOMMU
> quirks for platforms.
>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

Reviewed-by: Steven Price <steven.price@arm.com>

> ---
> drivers/gpu/drm/panfrost/panfrost_device.h | 3 +++
> drivers/gpu/drm/panfrost/panfrost_mmu.c | 1 +
> 2 files changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
> index 953f7536a773..2cf1a6a13af8 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_device.h
> +++ b/drivers/gpu/drm/panfrost/panfrost_device.h
> @@ -70,6 +70,9 @@ struct panfrost_compatible {
> int num_pm_domains;
> /* Only required if num_pm_domains > 1. */
> const char * const *pm_domain_names;
> +
> + /* IOMMU quirks flags */
> + unsigned long pgtbl_quirks;
> };
>
> struct panfrost_device {
> diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
> index e8f7b11352d2..55a846c70e46 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
> @@ -368,6 +368,7 @@ int panfrost_mmu_pgtable_alloc(struct panfrost_file_priv *priv)
> mmu->as = -1;
>
> mmu->pgtbl_cfg = (struct io_pgtable_cfg) {
> + .quirks = pfdev->comp ? pfdev->comp->pgtbl_quirks : 0,
> .pgsize_bitmap = SZ_4K | SZ_2M,
> .ias = FIELD_GET(0xff, pfdev->features.mmu_features),
> .oas = FIELD_GET(0xff00, pfdev->features.mmu_features),
>

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