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| author | Steve Longerbeam <slongerbeam@gmail.com> | 2018-08-01 12:12:17 -0700 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2018-08-02 11:47:39 +0200 |
| commit | 9f0ba3d92fe63fa72f88238d9dde47a38a7d8f40 (patch) | |
| tree | 2910eff025629de3a075ec1511af6505f08ace76 /drivers/gpu/ipu-v3 | |
| parent | bbe4a089e299efe696ef520e58513c12c0d497c9 (diff) | |
| download | linux-9f0ba3d92fe63fa72f88238d9dde47a38a7d8f40.tar.bz2 | |
gpu: ipu-v3: Fix U/V offset macros for planar 4:2:0
The U and V offset macros for planar 4:2:0 (U_OFFSET, V_OFFSET, and
UV_OFFSET), are not correct. The height component to the offset was
calculated as:
(pix->width * y / 4)
But this does not produce correct offsets for odd values of y (luma
line #). The luma line # must be decimated by two to produce the
correct U/V line #, so the correct formula is:
(pix->width * (y / 2) / 2)
Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/gpu/ipu-v3')
| -rw-r--r-- | drivers/gpu/ipu-v3/ipu-cpmem.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-cpmem.c b/drivers/gpu/ipu-v3/ipu-cpmem.c index 9f2d9ec42add..e68e4734f052 100644 --- a/drivers/gpu/ipu-v3/ipu-cpmem.c +++ b/drivers/gpu/ipu-v3/ipu-cpmem.c @@ -530,17 +530,17 @@ static const struct ipu_rgb def_bgra_16 = { #define Y_OFFSET(pix, x, y) ((x) + pix->width * (y)) #define U_OFFSET(pix, x, y) ((pix->width * pix->height) + \ - (pix->width * (y) / 4) + (x) / 2) + (pix->width * ((y) / 2) / 2) + (x) / 2) #define V_OFFSET(pix, x, y) ((pix->width * pix->height) + \ (pix->width * pix->height / 4) + \ - (pix->width * (y) / 4) + (x) / 2) + (pix->width * ((y) / 2) / 2) + (x) / 2) #define U2_OFFSET(pix, x, y) ((pix->width * pix->height) + \ (pix->width * (y) / 2) + (x) / 2) #define V2_OFFSET(pix, x, y) ((pix->width * pix->height) + \ (pix->width * pix->height / 2) + \ (pix->width * (y) / 2) + (x) / 2) #define UV_OFFSET(pix, x, y) ((pix->width * pix->height) + \ - (pix->width * (y) / 2) + (x)) + (pix->width * ((y) / 2)) + (x)) #define UV2_OFFSET(pix, x, y) ((pix->width * pix->height) + \ (pix->width * y) + (x)) |