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SubjectRe: [PATCH 3/3] drm/exynos/gsc: Add rotation hardware limits of gscaler
On Fri, Sep 1, 2017 at 3:47 AM, Hoegeun Kwon <hoegeun.kwon@samsung.com> wrote:
> The gscaler has hardware rotation limits that need to be imported from
> dts. Parse them and add them to the property list.
>
> The rotation hardware limits are related to the cropped source size.
> When swap occurs, use rot_max size instead of crop_max size.
>
> Also the scaling limits are related to post size, use pos size to
> check the limits.
>
> Signed-off-by: Hoegeun Kwon <hoegeun.kwon@samsung.com>
> ---
> drivers/gpu/drm/exynos/exynos_drm_gsc.c | 63 +++++++++++++++++++++------------
> include/uapi/drm/exynos_drm.h | 2 ++
> 2 files changed, 42 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_gsc.c b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
> index 0506b2b..dd9b057 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_gsc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
> @@ -1401,6 +1401,23 @@ static int gsc_ippdrv_check_property(struct device *dev,
> bool swap;
> int i;
>
> + config = &property->config[EXYNOS_DRM_OPS_DST];
> +
> + /* check for degree */
> + switch (config->degree) {
> + case EXYNOS_DRM_DEGREE_90:
> + case EXYNOS_DRM_DEGREE_270:
> + swap = true;
> + break;
> + case EXYNOS_DRM_DEGREE_0:
> + case EXYNOS_DRM_DEGREE_180:
> + swap = false;
> + break;
> + default:
> + DRM_ERROR("invalid degree.\n");
> + goto err_property;
> + }
> +
> for_each_ipp_ops(i) {
> if ((i == EXYNOS_DRM_OPS_SRC) &&
> (property->cmd == IPP_CMD_WB))
> @@ -1416,21 +1433,6 @@ static int gsc_ippdrv_check_property(struct device *dev,
> goto err_property;
> }
>
> - /* check for degree */
> - switch (config->degree) {
> - case EXYNOS_DRM_DEGREE_90:
> - case EXYNOS_DRM_DEGREE_270:
> - swap = true;
> - break;
> - case EXYNOS_DRM_DEGREE_0:
> - case EXYNOS_DRM_DEGREE_180:
> - swap = false;
> - break;
> - default:
> - DRM_ERROR("invalid degree.\n");
> - goto err_property;
> - }
> -
> /* check for buffer bound */
> if ((pos->x + pos->w > sz->hsize) ||
> (pos->y + pos->h > sz->vsize)) {
> @@ -1438,21 +1440,27 @@ static int gsc_ippdrv_check_property(struct device *dev,
> goto err_property;
> }
>
> + /*
> + * The rotation hardware limits are related to the cropped
> + * source size. So use rot_max size to check the limits when
> + * swap happens. And also the scaling limits are related to pos
> + * size, use pos size to check the limits.
> + */
> /* check for crop */
> if ((i == EXYNOS_DRM_OPS_SRC) && (pp->crop)) {
> if (swap) {
> if ((pos->h < pp->crop_min.hsize) ||
> - (sz->vsize > pp->crop_max.hsize) ||
> + (pos->h > pp->rot_max.hsize) ||
> (pos->w < pp->crop_min.vsize) ||
> - (sz->hsize > pp->crop_max.vsize)) {
> + (pos->w > pp->rot_max.vsize)) {
> DRM_ERROR("out of crop size.\n");
> goto err_property;
> }
> } else {
> if ((pos->w < pp->crop_min.hsize) ||
> - (sz->hsize > pp->crop_max.hsize) ||
> + (pos->w > pp->crop_max.hsize) ||
> (pos->h < pp->crop_min.vsize) ||
> - (sz->vsize > pp->crop_max.vsize)) {
> + (pos->h > pp->crop_max.vsize)) {
> DRM_ERROR("out of crop size.\n");
> goto err_property;
> }
> @@ -1463,17 +1471,17 @@ static int gsc_ippdrv_check_property(struct device *dev,
> if ((i == EXYNOS_DRM_OPS_DST) && (pp->scale)) {
> if (swap) {
> if ((pos->h < pp->scale_min.hsize) ||
> - (sz->vsize > pp->scale_max.hsize) ||
> + (pos->h > pp->scale_max.hsize) ||
> (pos->w < pp->scale_min.vsize) ||
> - (sz->hsize > pp->scale_max.vsize)) {
> + (pos->w > pp->scale_max.vsize)) {
> DRM_ERROR("out of scale size.\n");
> goto err_property;
> }
> } else {
> if ((pos->w < pp->scale_min.hsize) ||
> - (sz->hsize > pp->scale_max.hsize) ||
> + (pos->w > pp->scale_max.hsize) ||
> (pos->h < pp->scale_min.vsize) ||
> - (sz->vsize > pp->scale_max.vsize)) {
> + (pos->h > pp->scale_max.vsize)) {
> DRM_ERROR("out of scale size.\n");
> goto err_property;
> }
> @@ -1676,6 +1684,15 @@ static int gsc_probe(struct platform_device *pdev)
> dev_warn(dev, "failed to get system register.\n");
> ctx->sysreg = NULL;
> }
> +
> + ret = of_property_read_u32(dev->of_node, "rot-max-hsize",
> + &ctx->ippdrv.prop_list.rot_max.hsize);
> + ret |= of_property_read_u32(dev->of_node, "rot-max-vsize",
> + &ctx->ippdrv.prop_list.rot_max.vsize);
> + if (ret) {
> + dev_err(dev, "rot-max property should be provided by device tree.\n");
> + return -EINVAL;
> + }

You're adding a required property thus breaking the ABI without
explicit reason. Also the bindings have to be updated.

Best regards,
Krzysztof

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