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Subject[PATCH v4 2/4] gpu: ipu-v3: ipu-ic: Simplify selection of encoding matrix
Date
Simplify the selection of the Y'CbCr encoding matrices in init_csc().
A side-effect of this change is that init_csc() now allows YUV->YUV
using the identity matrix, intead of returning error.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
---
drivers/gpu/ipu-v3/ipu-ic.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/ipu-v3/ipu-ic.c b/drivers/gpu/ipu-v3/ipu-ic.c
index 3ef61f0b509b..e459615a49a1 100644
--- a/drivers/gpu/ipu-v3/ipu-ic.c
+++ b/drivers/gpu/ipu-v3/ipu-ic.c
@@ -244,16 +244,12 @@ static int init_csc(struct ipu_ic *ic,
base = (u32 __iomem *)
(priv->tpmem_base + ic->reg->tpmem_csc[csc_index]);

- if (inf == IPUV3_COLORSPACE_YUV && outf == IPUV3_COLORSPACE_RGB)
+ if (inf == outf)
+ params = &ic_csc_identity;
+ else if (inf == IPUV3_COLORSPACE_YUV)
params = &ic_csc_ycbcr2rgb_bt601;
- else if (inf == IPUV3_COLORSPACE_RGB && outf == IPUV3_COLORSPACE_YUV)
+ else
params = &ic_csc_rgb2ycbcr_bt601;
- else if (inf == IPUV3_COLORSPACE_RGB && outf == IPUV3_COLORSPACE_RGB)
- params = &ic_csc_identity;
- else {
- dev_err(priv->ipu->dev, "Unsupported color space conversion\n");
- return -EINVAL;
- }

/* Cast to unsigned */
c = (const u16 (*)[3])params->coeff;
--
2.17.1
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