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SubjectRe: [PATCH 3/3] drm/exynos/gsc: Add rotation hardware limits of gscaler
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On 09/01/2017 04:31 PM, Marek Szyprowski wrote:
> Hi Hoegeun,
>
> On 2017-09-01 03:47, Hoegeun Kwon 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;
>> + }
>> }
>> /* clock control */
>> 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;
>> };
>> /**
>
> IMO maximum supported picture size should be hardcoded into driver, there
> is no need to add device tree properties for that. Please also check v4l2
> driver for Exynos GSC.
>
> Currently it uses only one compatible - "exynos5-gsc", but imho You
> should
> simply replace it with "exynos5250-gsc" and "exynos5420-gsc", and add
> those
> variants with proper maximum supported size (2047 and 2016 respectively).
>
> Best regards

Hi Krzysztof and Marek,

Thanks Krzysztof and Marek reviews.

As Marek says, rot_max size will be hardcoded into driver,
then it will not break the ABI. And also,
I will check the v4l2 driver for Exynos GSC.

Best regards,
Hoegeun

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