diff options
Diffstat (limited to 'drivers/media/platform/vsp1/vsp1_uds.c')
| -rw-r--r-- | drivers/media/platform/vsp1/vsp1_uds.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/media/platform/vsp1/vsp1_uds.c b/drivers/media/platform/vsp1/vsp1_uds.c index c20c84b54936..27012af973b2 100644 --- a/drivers/media/platform/vsp1/vsp1_uds.c +++ b/drivers/media/platform/vsp1/vsp1_uds.c @@ -314,13 +314,13 @@ static void uds_configure_partition(struct vsp1_entity *entity, output = vsp1_entity_get_pad_format(&uds->entity, uds->entity.config, UDS_PAD_SOURCE); - /* Input size clipping */ + /* Input size clipping. */ vsp1_uds_write(uds, dlb, VI6_UDS_HSZCLIP, VI6_UDS_HSZCLIP_HCEN | (0 << VI6_UDS_HSZCLIP_HCL_OFST_SHIFT) | (partition->uds_sink.width << VI6_UDS_HSZCLIP_HCL_SIZE_SHIFT)); - /* Output size clipping */ + /* Output size clipping. */ vsp1_uds_write(uds, dlb, VI6_UDS_CLIP_SIZE, (partition->uds_source.width << VI6_UDS_CLIP_SIZE_HSIZE_SHIFT) | @@ -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 overlapping partition windows we clamp at units of 256 and + * the remaining pixels are reserved. + */ if (hscale <= 2) return 256; else if (hscale <= 4) @@ -366,7 +374,7 @@ static void uds_partition(struct vsp1_entity *entity, const struct v4l2_mbus_framefmt *output; const struct v4l2_mbus_framefmt *input; - /* Initialise the partition state */ + /* Initialise the partition state. */ partition->uds_sink = *window; partition->uds_source = *window; |