linux-kernel - [PATCH 3.16 013/148] media: ov6650: Fix incorrect use of JPEG colorspace

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Date:   Sat, 08 Feb 2020 18:19:12 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Janusz Krzysztofik" <jmkrzyszt@...il.com>,
        "Sakari Ailus" <sakari.ailus@...ux.intel.com>,
        "Mauro Carvalho Chehab" <mchehab+samsung@...nel.org>
Subject: [PATCH 3.16 013/148] media: ov6650: Fix incorrect use of JPEG
 colorspace

3.16.82-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Janusz Krzysztofik <jmkrzyszt@...il.com>

commit 12500731895ef09afc5b66b86b76c0884fb9c7bf upstream.

Since its initial submission, the driver selects V4L2_COLORSPACE_JPEG
for supported formats other than V4L2_MBUS_FMT_SBGGR8_1X8.  According
to v4l2-compliance test program, V4L2_COLORSPACE_JPEG applies
exclusively to V4L2_PIX_FMT_JPEG.  Since the sensor does not support
JPEG format, fix it to always select V4L2_COLORSPACE_SRGB.

Fixes: 2f6e2404799a ("[media] SoC Camera: add driver for OV6650 sensor")
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@...il.com>
Signed-off-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
[bwh: Backported to 3.16: adjust filename, context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/media/i2c/soc_camera/ov6650.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

--- a/drivers/media/i2c/soc_camera/ov6650.c
+++ b/drivers/media/i2c/soc_camera/ov6650.c
@@ -203,7 +203,6 @@ struct ov6650 {
 	unsigned long		pclk_max;	/* from resolution and format */
 	struct v4l2_fract	tpf;		/* as requested with s_parm */
 	enum v4l2_mbus_pixelcode code;
-	enum v4l2_colorspace	colorspace;
 };
 
 
@@ -508,7 +507,7 @@ static int ov6650_g_fmt(struct v4l2_subd
 	mf->width	= priv->rect.width >> priv->half_scale;
 	mf->height	= priv->rect.height >> priv->half_scale;
 	mf->code	= priv->code;
-	mf->colorspace	= priv->colorspace;
+	mf->colorspace	= V4L2_COLORSPACE_SRGB;
 	mf->field	= V4L2_FIELD_NONE;
 
 	return 0;
@@ -619,11 +618,6 @@ static int ov6650_s_fmt(struct v4l2_subd
 		priv->pclk_max = 8000000;
 	}
 
-	if (code == V4L2_MBUS_FMT_SBGGR8_1X8)
-		priv->colorspace = V4L2_COLORSPACE_SRGB;
-	else if (code != 0)
-		priv->colorspace = V4L2_COLORSPACE_JPEG;
-
 	if (half_scale) {
 		dev_dbg(&client->dev, "max resolution: QCIF\n");
 		coma_set |= COMA_QCIF;
@@ -676,7 +670,6 @@ static int ov6650_s_fmt(struct v4l2_subd
 		ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask);
 
 	if (!ret) {
-		mf->colorspace	= priv->colorspace;
 		mf->width = priv->rect.width >> half_scale;
 		mf->height = priv->rect.height >> half_scale;
 	}
@@ -695,6 +688,7 @@ static int ov6650_try_fmt(struct v4l2_su
 				&mf->height, 2, H_CIF, 1, 0);
 
 	mf->field = V4L2_FIELD_NONE;
+	mf->colorspace = V4L2_COLORSPACE_SRGB;
 
 	switch (mf->code) {
 	case V4L2_MBUS_FMT_Y10_1X10:
@@ -704,12 +698,10 @@ static int ov6650_try_fmt(struct v4l2_su
 	case V4L2_MBUS_FMT_YUYV8_2X8:
 	case V4L2_MBUS_FMT_VYUY8_2X8:
 	case V4L2_MBUS_FMT_UYVY8_2X8:
-		mf->colorspace = V4L2_COLORSPACE_JPEG;
 		break;
 	default:
 		mf->code = V4L2_MBUS_FMT_SBGGR8_1X8;
 	case V4L2_MBUS_FMT_SBGGR8_1X8:
-		mf->colorspace = V4L2_COLORSPACE_SRGB;
 		break;
 	}
 
@@ -1016,7 +1008,6 @@ static int ov6650_probe(struct i2c_clien
 	priv->rect.height = H_CIF;
 	priv->half_scale  = false;
 	priv->code	  = V4L2_MBUS_FMT_YUYV8_2X8;
-	priv->colorspace  = V4L2_COLORSPACE_JPEG;
 
 	priv->clk = v4l2_clk_get(&client->dev, "mclk");
 	if (IS_ERR(priv->clk)) {