linux-kernel - [PATCH v4 2/4] gpu: ipu-v3: ipu-ic: Simplify selection of encoding matrix

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Message-Id: <20190209014748.10427-3-slongerbeam@gmail.com>
Date:   Fri,  8 Feb 2019 17:47:46 -0800
From:   Steve Longerbeam <slongerbeam@...il.com>
To:     linux-media@...r.kernel.org
Cc:     Tim Harvey <tharvey@...eworks.com>,
        Steve Longerbeam <slongerbeam@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS FOR FREESCALE
        IMX), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v4 2/4] gpu: ipu-v3: ipu-ic: Simplify selection of encoding matrix

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@...il.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