V4L/DVB (13659): soc-camera: convert to the new mediabus API

Convert soc-camera core and all soc-camera drivers to the new mediabus
API. This also takes soc-camera client drivers one step closer to also be
usable with generic v4l2-subdev host drivers.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 85 insertions, 56 deletions

diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c
index cc9066000c2d..b62c0bd3f8ea 100644
--- a/drivers/media/video/mt9m001.c
+++ b/drivers/media/video/mt9m001.c
@@ -48,41 +48,46 @@
 #define MT9M001_COLUMN_SKIP             20
 #define MT9M001_ROW_SKIP                12
 
-static const struct soc_camera_data_format mt9m001_colour_formats[] = {
+/* MT9M001 has only one fixed colorspace per pixelcode */
+struct mt9m001_datafmt {
+        enum v4l2_mbus_pixelcode        code;
+        enum v4l2_colorspace            colorspace;
+};
+
+/* Find a data format by a pixel code in an array */
+static const struct mt9m001_datafmt *mt9m001_find_datafmt(
+        enum v4l2_mbus_pixelcode code, const struct mt9m001_datafmt *fmt,
+        int n)
+{
+        int i;
+        for (i = 0; i < n; i++)
+                if (fmt[i].code == code)
+                        return fmt + i;
+
+        return NULL;
+}
+
+static const struct mt9m001_datafmt mt9m001_colour_fmts[] = {
         /*
          * Order important: first natively supported,
          * second supported with a GPIO extender
          */
-        {
-                .name           = "Bayer (sRGB) 10 bit",
-                .depth          = 10,
-                .fourcc         = V4L2_PIX_FMT_SBGGR16,
-                .colorspace     = V4L2_COLORSPACE_SRGB,
-        }, {
-                .name           = "Bayer (sRGB) 8 bit",
-                .depth          = 8,
-                .fourcc         = V4L2_PIX_FMT_SBGGR8,
-                .colorspace     = V4L2_COLORSPACE_SRGB,
-        }
+        {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
+        {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
 };
 
-static const struct soc_camera_data_format mt9m001_monochrome_formats[] = {
+static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = {
         /* Order important - see above */
-        {
-                .name           = "Monochrome 10 bit",
-                .depth          = 10,
-                .fourcc         = V4L2_PIX_FMT_Y16,
-        }, {
-                .name           = "Monochrome 8 bit",
-                .depth          = 8,
-                .fourcc         = V4L2_PIX_FMT_GREY,
-        },
+        {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
+        {V4L2_MBUS_FMT_GREY8_1X8, V4L2_COLORSPACE_JPEG},
 };
 
 struct mt9m001 {
         struct v4l2_subdev subdev;
         struct v4l2_rect rect;  /* Sensor window */
-        __u32 fourcc;
+        const struct mt9m001_datafmt *fmt;
+        const struct mt9m001_datafmt *fmts;
+        int num_fmts;
         int model;      /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */
         unsigned int gain;
         unsigned int exposure;
@@ -209,8 +214,7 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
         const u16 hblank = 9, vblank = 25;
         unsigned int total_h;
 
-        if (mt9m001->fourcc == V4L2_PIX_FMT_SBGGR8 ||
-            mt9m001->fourcc == V4L2_PIX_FMT_SBGGR16)
+        if (mt9m001->fmts == mt9m001_colour_fmts)
                 /*
                  * Bayer format - even number of rows for simplicity,
                  * but let the user play with the top row.
@@ -290,32 +294,32 @@ static int mt9m001_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
         return 0;
 }
 
-static int mt9m001_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
+static int mt9m001_g_fmt(struct v4l2_subdev *sd,
+                         struct v4l2_mbus_framefmt *mf)
 {
         struct i2c_client *client = sd->priv;
         struct mt9m001 *mt9m001 = to_mt9m001(client);
-        struct v4l2_pix_format *pix = &f->fmt.pix;
 
-        pix->width              = mt9m001->rect.width;
-        pix->height             = mt9m001->rect.height;
-        pix->pixelformat        = mt9m001->fourcc;
-        pix->field              = V4L2_FIELD_NONE;
-        pix->colorspace         = V4L2_COLORSPACE_SRGB;
+        mf->width       = mt9m001->rect.width;
+        mf->height      = mt9m001->rect.height;
+        mf->code        = mt9m001->fmt->code;
+        mf->colorspace  = mt9m001->fmt->colorspace;
+        mf->field       = V4L2_FIELD_NONE;
 
         return 0;
 }
 
-static int mt9m001_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
+static int mt9m001_s_fmt(struct v4l2_subdev *sd,
+                         struct v4l2_mbus_framefmt *mf)
 {
         struct i2c_client *client = sd->priv;
         struct mt9m001 *mt9m001 = to_mt9m001(client);
-        struct v4l2_pix_format *pix = &f->fmt.pix;
         struct v4l2_crop a = {
                 .c = {
                         .left   = mt9m001->rect.left,
                         .top    = mt9m001->rect.top,
-                        .width  = pix->width,
-                        .height = pix->height,
+                        .width  = mf->width,
+                        .height = mf->height,
                 },
         };
         int ret;
@@ -323,28 +327,39 @@ static int mt9m001_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
         /* No support for scaling so far, just crop. TODO: use skipping */
         ret = mt9m001_s_crop(sd, &a);
         if (!ret) {
-                pix->width = mt9m001->rect.width;
-                pix->height = mt9m001->rect.height;
-                mt9m001->fourcc = pix->pixelformat;
+                mf->width       = mt9m001->rect.width;
+                mf->height      = mt9m001->rect.height;
+                mt9m001->fmt    = mt9m001_find_datafmt(mf->code,
+                                        mt9m001->fmts, mt9m001->num_fmts);
+                mf->colorspace  = mt9m001->fmt->colorspace;
         }
 
         return ret;
 }
 
-static int mt9m001_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
+static int mt9m001_try_fmt(struct v4l2_subdev *sd,
+                           struct v4l2_mbus_framefmt *mf)
 {
         struct i2c_client *client = sd->priv;
         struct mt9m001 *mt9m001 = to_mt9m001(client);
-        struct v4l2_pix_format *pix = &f->fmt.pix;
+        const struct mt9m001_datafmt *fmt;
 
-        v4l_bound_align_image(&pix->width, MT9M001_MIN_WIDTH,
+        v4l_bound_align_image(&mf->width, MT9M001_MIN_WIDTH,
                 MT9M001_MAX_WIDTH, 1,
-                &pix->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top,
+                &mf->height, MT9M001_MIN_HEIGHT + mt9m001->y_skip_top,
                 MT9M001_MAX_HEIGHT + mt9m001->y_skip_top, 0, 0);
 
-        if (pix->pixelformat == V4L2_PIX_FMT_SBGGR8 ||
-            pix->pixelformat == V4L2_PIX_FMT_SBGGR16)
-                pix->height = ALIGN(pix->height - 1, 2);
+        if (mt9m001->fmts == mt9m001_colour_fmts)
+                mf->height = ALIGN(mf->height - 1, 2);
+
+        fmt = mt9m001_find_datafmt(mf->code, mt9m001->fmts,
+                                   mt9m001->num_fmts);
+        if (!fmt) {
+                fmt = mt9m001->fmt;
+                mf->code = fmt->code;
+        }
+
+        mf->colorspace  = fmt->colorspace;
 
         return 0;
 }
@@ -608,11 +623,11 @@ static int mt9m001_video_probe(struct soc_camera_device *icd,
         case 0x8411:
         case 0x8421:
                 mt9m001->model = V4L2_IDENT_MT9M001C12ST;
-                icd->formats = mt9m001_colour_formats;
+                mt9m001->fmts = mt9m001_colour_fmts;
                 break;
         case 0x8431:
                 mt9m001->model = V4L2_IDENT_MT9M001C12STM;
-                icd->formats = mt9m001_monochrome_formats;
+                mt9m001->fmts = mt9m001_monochrome_fmts;
                 break;
         default:
                 dev_err(&client->dev,
@@ -620,7 +635,7 @@ static int mt9m001_video_probe(struct soc_camera_device *icd,
                 return -ENODEV;
         }
 
-        icd->num_formats = 0;
+        mt9m001->num_fmts = 0;
 
         /*
          * This is a 10bit sensor, so by default we only allow 10bit.
@@ -633,14 +648,14 @@ static int mt9m001_video_probe(struct soc_camera_device *icd,
                 flags = SOCAM_DATAWIDTH_10;
 
         if (flags & SOCAM_DATAWIDTH_10)
-                icd->num_formats++;
+                mt9m001->num_fmts++;
         else
-                icd->formats++;
+                mt9m001->fmts++;
 
         if (flags & SOCAM_DATAWIDTH_8)
-                icd->num_formats++;
+                mt9m001->num_fmts++;
 
-        mt9m001->fourcc = icd->formats->fourcc;
+        mt9m001->fmt = &mt9m001->fmts[0];
 
         dev_info(&client->dev, "Detected a MT9M001 chip ID %x (%s)\n", data,
                  data == 0x8431 ? "C12STM" : "C12ST");
@@ -686,14 +701,28 @@ static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = {
 #endif
 };
 
+static int mt9m001_enum_fmt(struct v4l2_subdev *sd, int index,
+                            enum v4l2_mbus_pixelcode *code)
+{
+        struct i2c_client *client = sd->priv;
+        struct mt9m001 *mt9m001 = to_mt9m001(client);
+
+        if ((unsigned int)index >= mt9m001->num_fmts)
+                return -EINVAL;
+
+        *code = mt9m001->fmts[index].code;
+        return 0;
+}
+
 static struct v4l2_subdev_video_ops mt9m001_subdev_video_ops = {
         .s_stream       = mt9m001_s_stream,
-        .s_fmt          = mt9m001_s_fmt,
-        .g_fmt          = mt9m001_g_fmt,
-        .try_fmt        = mt9m001_try_fmt,
+        .s_mbus_fmt     = mt9m001_s_fmt,
+        .g_mbus_fmt     = mt9m001_g_fmt,
+        .try_mbus_fmt   = mt9m001_try_fmt,
         .s_crop         = mt9m001_s_crop,
         .g_crop         = mt9m001_g_crop,
         .cropcap        = mt9m001_cropcap,
+        .enum_mbus_fmt  = mt9m001_enum_fmt,
 };
 
 static struct v4l2_subdev_sensor_ops mt9m001_subdev_sensor_ops = {