On Tue, 22 Sep 2015, Josh Wu wrote:
> This patch enable Atmel ISI preview path to convert the YUV to RGB format.
>
> Signed-off-by: Josh Wu <[email protected]>
> ---
>
> drivers/media/platform/soc_camera/atmel-isi.c | 38
> ++++++++++++++++++++-------
> 1 file changed, 29 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/media/platform/soc_camera/atmel-isi.c
> b/drivers/media/platform/soc_camera/atmel-isi.c
> index e87d354..e33a16a 100644
> --- a/drivers/media/platform/soc_camera/atmel-isi.c
> +++ b/drivers/media/platform/soc_camera/atmel-isi.c
> @@ -201,13 +201,20 @@ static bool is_supported(struct soc_camera_device *icd,
> case V4L2_PIX_FMT_UYVY:
> case V4L2_PIX_FMT_YVYU:
> case V4L2_PIX_FMT_VYUY:
> + /* RGB */
> + case V4L2_PIX_FMT_RGB565:
> return true;
> - /* RGB, TODO */
> default:
> return false;
> }
> }
>
> +static bool is_output_rgb(const struct soc_mbus_pixelfmt *host_fmt)
> +{
> + return host_fmt->fourcc == V4L2_PIX_FMT_RGB565 ||
> + host_fmt->fourcc == V4L2_PIX_FMT_RGB32;
> +}
> +
Why not just pass fourcc to this function? Or maybe just embed it in
start_streaming - it won't clutter it a lot.
> static irqreturn_t atmel_isi_handle_streaming(struct atmel_isi *isi)
> {
> if (isi->active) {
> @@ -467,6 +474,8 @@ static int start_streaming(struct vb2_queue *vq, unsigned
> int count)
> struct atmel_isi *isi = ici->priv;
> int ret;
>
> + isi->enable_preview_path = is_output_rgb(icd->current_fmt->host_fmt);
> +
> pm_runtime_get_sync(ici->v4l2_dev.dev);
>
> /* Reset ISI */
> @@ -688,6 +697,14 @@ static const struct soc_mbus_pixelfmt
> isi_camera_formats[] = {
> .order = SOC_MBUS_ORDER_LE,
> .layout = SOC_MBUS_LAYOUT_PACKED,
> },
> + {
> + .fourcc = V4L2_PIX_FMT_RGB565,
> + .name = "RGB565",
> + .bits_per_sample = 8,
> + .packing = SOC_MBUS_PACKING_2X8_PADHI,
> + .order = SOC_MBUS_ORDER_LE,
> + .layout = SOC_MBUS_LAYOUT_PACKED,
> + },
> };
>
> /* This will be corrected as we get more formats */
> @@ -744,7 +761,7 @@ static int isi_camera_get_formats(struct
> soc_camera_device *icd,
> struct soc_camera_format_xlate *xlate)
> {
> struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
> - int formats = 0, ret;
> + int formats = 0, ret, i, n;
> /* sensor format */
> struct v4l2_subdev_mbus_code_enum code = {
> .which = V4L2_SUBDEV_FORMAT_ACTIVE,
> @@ -778,13 +795,16 @@ static int isi_camera_get_formats(struct
> soc_camera_device *icd,
> case MEDIA_BUS_FMT_VYUY8_2X8:
> case MEDIA_BUS_FMT_YUYV8_2X8:
> case MEDIA_BUS_FMT_YVYU8_2X8:
> - formats++;
> - if (xlate) {
> - xlate->host_fmt = &isi_camera_formats[0];
> - xlate->code = code.code;
> - xlate++;
> - dev_dbg(icd->parent, "Providing format %s using code
> %d\n",
> - isi_camera_formats[0].name, code.code);
> + n = ARRAY_SIZE(isi_camera_formats);
> + formats += n;
> + for (i = 0; i < n; i++) {
> + if (xlate) {
I'd put if outside of the loop, or just do
+ for (i = 0; xlate && i < n; i++) {
> + xlate->host_fmt = &isi_camera_formats[i];
> + xlate->code = code.code;
> + dev_dbg(icd->parent, "Providing format %s using
> code %d\n",
> + isi_camera_formats[0].name, code.code);
> + xlate++;
> + }
> }
> break;
> default:
> --
> 1.9.1
>
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