[PATCH] drm/exynos/gsc: fix the hardware limitations

[Inki Dae]

2016년 11월 24일 16:51에 Hoegeun Kwon 이(가) 쓴 글:
> The maximum size of input or output rotation is 2047 x 2047.
> Fixed an error on limitations.

You would need to consider other SoC - Exynos5250/5250/5410/5420/5433 because other have different rotation limitations like below,

Exynos5250
Maximum size : 2048x2048 for Tile Mode or Rotation

Exynos5410/5420
Maximum size : 2016x2016 for Tile mode or Rotation

In case of Exynos5433, it seems more complicated. Refer to Chapter 45.5.4 Size Constraints of TRM document.

Thanks.

> 
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon at samsung.com>
> ---
>  drivers/gpu/drm/exynos/exynos_drm_gsc.c | 11 +++++++++--
>  include/uapi/drm/exynos_drm.h           |  2 ++
>  2 files changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_gsc.c b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
> index bef5798..36e05ae 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_gsc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
> @@ -71,6 +71,7 @@
>  #define GSC_CROP_MIN	32
>  #define GSC_SCALE_MAX	4224
>  #define GSC_SCALE_MIN	32
> +#define GSC_ROT_MAX	2047
>  #define GSC_COEF_RATIO	7
>  #define GSC_COEF_PHASE	9
>  #define GSC_COEF_ATTR	16
> @@ -1371,6 +1372,8 @@ static int gsc_init_prop_list(struct exynos_drm_ippdrv *ippdrv)
>  	prop_list->scale_max.vsize = GSC_SCALE_MAX;
>  	prop_list->scale_min.hsize = GSC_SCALE_MIN;
>  	prop_list->scale_min.vsize = GSC_SCALE_MIN;
> +	prop_list->rot_max.hsize = GSC_ROT_MAX;
> +	prop_list->rot_max.vsize = GSC_ROT_MAX;
>  
>  	return 0;
>  }
> @@ -1444,7 +1447,9 @@ static int gsc_ippdrv_check_property(struct device *dev,
>  				if ((pos->h < pp->crop_min.hsize) ||
>  					(sz->vsize > pp->crop_max.hsize) ||
>  					(pos->w < pp->crop_min.vsize) ||
> -					(sz->hsize > pp->crop_max.vsize)) {
> +					(sz->hsize > pp->crop_max.vsize) ||
> +					(pos->h > pp->rot_max.hsize) ||
> +					(pos->w > pp->rot_max.vsize)) {
>  					DRM_ERROR("out of crop size.\n");
>  					goto err_property;
>  				}
> @@ -1465,7 +1470,9 @@ static int gsc_ippdrv_check_property(struct device *dev,
>  				if ((pos->h < pp->scale_min.hsize) ||
>  					(sz->vsize > pp->scale_max.hsize) ||
>  					(pos->w < pp->scale_min.vsize) ||
> -					(sz->hsize > pp->scale_max.vsize)) {
> +					(sz->hsize > pp->scale_max.vsize) ||
> +					(pos->h > pp->rot_max.hsize) ||
> +					(pos->w > pp->rot_max.vsize)) {
>  					DRM_ERROR("out of scale size.\n");
>  					goto err_property;
>  				}
> diff --git a/include/uapi/drm/exynos_drm.h b/include/uapi/drm/exynos_drm.h
> index cb3e9f9..d5d5518 100644
> --- a/include/uapi/drm/exynos_drm.h
> +++ b/include/uapi/drm/exynos_drm.h
> @@ -192,6 +192,7 @@ enum drm_exynos_planer {
>   * @crop_max: crop max resolution.
>   * @scale_min: scale min resolution.
>   * @scale_max: scale max resolution.
> + * @rot_max: rotation max resolution.
>   */
>  struct drm_exynos_ipp_prop_list {
>  	__u32	version;
> @@ -210,6 +211,7 @@ struct drm_exynos_ipp_prop_list {
>  	struct drm_exynos_sz	crop_max;
>  	struct drm_exynos_sz	scale_min;
>  	struct drm_exynos_sz	scale_max;
> +	struct drm_exynos_sz	rot_max;
>  };
>  
>  /**
>