On 4/5/20 8:16 PM, Laurent Pinchart wrote:
Hi Dafna,
Thank you for the patch.
On Thu, Apr 02, 2020 at 09:04:18PM +0200, Dafna Hirschfeld wrote:
Plane formats with the u and v planes swapped can be
supported by changing the address of the cb and cr in
the buffer.
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
Acked-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>
---
drivers/staging/media/rkisp1/rkisp1-capture.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/staging/media/rkisp1/rkisp1-capture.c b/drivers/staging/media/rkisp1/rkisp1-capture.c
index fa2849209433..2d274e8f565b 100644
--- a/drivers/staging/media/rkisp1/rkisp1-capture.c
+++ b/drivers/staging/media/rkisp1/rkisp1-capture.c
@@ -41,6 +41,10 @@
(((write_format) == RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA) || \
((write_format) == RKISP1_MI_CTRL_SP_WRITE_SPLA))
+#define RKISP1_IS_PLANAR(write_format) \
+ (((write_format) == RKISP1_MI_CTRL_SP_WRITE_PLA) || \
+ ((write_format) == RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8))
+
enum rkisp1_plane {
RKISP1_PLANE_Y = 0,
RKISP1_PLANE_CB = 1,
@@ -788,6 +792,19 @@ static void rkisp1_vb2_buf_queue(struct vb2_buffer *vb)
rkisp1_pixfmt_comp_size(pixm, RKISP1_PLANE_CB);
}
+ /*
+ * uv swap can be supported for plane formats by switching
+ * the address of cb and cr
+ */
+ if (RKISP1_IS_PLANAR(cap->pix.cfg->write_format) &&
As commented on patch 3/5, could this be checked from the data in
v4l2_format_info ?
yes
+ cap->pix.cfg->uv_swap) {
+ ispbuf->buff_addr[RKISP1_PLANE_CR] =
+ ispbuf->buff_addr[RKISP1_PLANE_CB];
+ ispbuf->buff_addr[RKISP1_PLANE_CB] =
+ ispbuf->buff_addr[RKISP1_PLANE_CR] +
+ rkisp1_pixfmt_comp_size(pixm, RKISP1_PLANE_CR);
How about
swap(ispbuf->buff_addr[RKISP1_PLANE_CR],
ispbuf->buff_addr[RKISP1_PLANE_CB]);
?
This also works, theoretically if there was a format where the Cb, Cr planes
are not equal size then a swap will not work.
Thanks,
Dafna
+ }
+
spin_lock_irqsave(&cap->buf.lock, flags);
/*
