[PATCH v2 1/4] drm/prime: Limit scatter list size with dedicated DMA device

AngeloGioacchino Del Regno angelogioacchino.delregno at collabora.com
Wed Mar 11 07:40:32 PDT 2026


Il 11/03/26 10:49, Chen-Yu Tsai ha scritto:
> If a dedicated DMA device is specified for the DRM device, then the
> scatter list size limit should pertain to the DMA device.
> 
> Use the dedicated DMA device, if given, to limit the scatter list size.
> This only applies to drivers that have called drm_dev_set_dma_dev() and
> are using drm_prime_pages_to_sg() either directly or through the SHMEM
> helpers. At the time of this writing, the former case only includes the
> Rockchip DRM driver, while the latter case includes the gud, udl, and
> the tiny appletbdrm and gm12u320 drivers.
> 
> Reviewed-by: Thomas Zimmermann <tzimmermann at suse.de>
> Signed-off-by: Chen-Yu Tsai <wenst at chromium.org>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>




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