From: Kieran Bingham Date: Fri, 14 Sep 2018 14:26:51 +0000 (-0400) Subject: media: vsp1: Document max_width restriction on SRU X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=ce51fd3b4a56bb6c027d9ffa41e2668a70655040;p=openwrt%2Fstaging%2Fblogic.git media: vsp1: Document max_width restriction on SRU The SRU is currently restricted to 256 pixels as part of the current partition algorithm. Document that the actual capability of this component is 288 pixels, but don't increase the implementation. The extended partition algorithm may later choose to utilise a larger input to support overlapping partitions which will improve the quality of the output images. Signed-off-by: Kieran Bingham Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/vsp1/vsp1_sru.c b/drivers/media/platform/vsp1/vsp1_sru.c index 9919bebf4c54..b1617cb1f2b9 100644 --- a/drivers/media/platform/vsp1/vsp1_sru.c +++ b/drivers/media/platform/vsp1/vsp1_sru.c @@ -312,6 +312,11 @@ static unsigned int sru_max_width(struct vsp1_entity *entity, output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config, SRU_PAD_SOURCE); + /* + * The maximum input width of the SRU is 288 input pixels, but 32 + * pixels are reserved to support overlapping partition windows when + * scaling. + */ if (input->width != output->width) return 512; else