On Tue 31 July 2012 14:12:32 Shaik Ameer Basha wrote:
> From: Sungchun Kang <sungchun.kang@xxxxxxxxxxx>
>
> This patch adds the memory to memory (m2m) interface functionality
> for the G-Scaler driver.
>
> Signed-off-by: Hynwoong Kim <khw0178.kim@xxxxxxxxxxx>
> Signed-off-by: Sungchun Kang <sungchun.kang@xxxxxxxxxxx>
> Signed-off-by: Shaik Ameer Basha <shaik.ameer@xxxxxxxxxxx>
> Reviewed-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> ---
> drivers/media/video/exynos-gsc/gsc-m2m.c | 772 ++++++++++++++++++++++++++++++
> 1 files changed, 772 insertions(+), 0 deletions(-)
> create mode 100644 drivers/media/video/exynos-gsc/gsc-m2m.c
>
> diff --git a/drivers/media/video/exynos-gsc/gsc-m2m.c b/drivers/media/video/exynos-gsc/gsc-m2m.c
> new file mode 100644
> index 0000000..d7ecdb8
> --- /dev/null
> +++ b/drivers/media/video/exynos-gsc/gsc-m2m.c
> +static int gsc_m2m_querycap(struct file *file, void *fh,
> + struct v4l2_capability *cap)
> +{
> + struct gsc_ctx *ctx = fh_to_ctx(fh);
> + struct gsc_dev *gsc = ctx->gsc_dev;
> +
> + strlcpy(cap->driver, gsc->pdev->name, sizeof(cap->driver));
> + strlcpy(cap->card, gsc->pdev->name, sizeof(cap->card));
> + strlcpy(cap->bus_info, "platform", sizeof(cap->bus_info));
> + cap->device_caps = V4L2_CAP_STREAMING |
> + V4L2_CAP_VIDEO_CAPTURE_MPLANE |
> + V4L2_CAP_VIDEO_OUTPUT_MPLANE;
Yesterday the new V4L2_CAP_M2M_PLANE was added. You should add this
capability here. It is up to you to decide whether to remove the
CAPTURE_MPLANE and OUTPUT_MPLANE caps at the same time, or leave them for
a bit until any applications have had the chance to use the new M2M capability.
Combining the capture and output caps caused problems since apps would misdetect
this as a normal capture device instead of an M2M device. It's only for a
transition time that all three caps are allowed.
Regards,
Hans
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