| Message ID | 20180831144044.31713-6-kieran.bingham+renesas@ideasonboard.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Delegated to: | Geert Uytterhoeven |
| Headers | show |
| Series | VSP1 Updates | expand |
diff --git a/drivers/media/platform/vsp1/vsp1_uds.c b/drivers/media/platform/vsp1/vsp1_uds.c index c20c84b54936..7c11651db5d4 100644 --- a/drivers/media/platform/vsp1/vsp1_uds.c +++ b/drivers/media/platform/vsp1/vsp1_uds.c @@ -342,6 +342,14 @@ static unsigned int uds_max_width(struct vsp1_entity *entity, UDS_PAD_SOURCE); hscale = output->width / input->width; + /* + * The maximum width of the UDS is 304 pixels. These are input pixels + * in the event of up-scaling, and output pixels in the event of + * downscaling. + * + * To support the current parition algorithm, we clamp at units of 256. + */ + if (hscale <= 2) return 256; else if (hscale <= 4)
The UDS is currently restricted based on a partition size of 256 pixels. Document the actual restrictions, but don't increase the implementation. The extended partition algorithm may later choose to utilise a larger partition size to support overlapping partitions. Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> --- drivers/media/platform/vsp1/vsp1_uds.c | 8 ++++++++ 1 file changed, 8 insertions(+)