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Subject[PATCH v2 12/43] drm/fourcc: Add format helpers for checking YUV sub-sampling
Date
This introduces new format helpers that use the previously-introduced
format info helpers for checking YUV sub-sampling.

Only the format fourcc is required by these helpers and the formats are
iterated from the list.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
drivers/gpu/drm/drm_fourcc.c | 105 +++++++++++++++++++++++++++++++++++
include/drm/drm_fourcc.h | 5 ++
2 files changed, 110 insertions(+)

diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
index b56e773f9f63..6d395c586ad5 100644
--- a/drivers/gpu/drm/drm_fourcc.c
+++ b/drivers/gpu/drm/drm_fourcc.c
@@ -492,6 +492,111 @@ bool drm_format_is_yuv_planar(uint32_t format)
}
EXPORT_SYMBOL(drm_format_is_yuv_planar);

+/**
+ * drm_format_is_yuv_sampling_410 - check that the format is a YUV format with
+ * 4:1:0 sub-sampling
+ * @format: pixel format
+ *
+ * Returns:
+ * A boolean indicating whether the format is a YUV format with 4:1:0
+ * sub-sampling.
+ */
+bool drm_format_is_yuv_sampling_410(uint32_t format)
+{
+ const struct drm_format_info *info;
+
+ info = drm_format_info(format);
+ if (!info)
+ return false;
+
+ return drm_format_info_is_yuv_sampling_410(info);
+}
+EXPORT_SYMBOL(drm_format_is_yuv_sampling_410);
+
+/**
+ * drm_format_is_yuv_sampling_411 - check that the format is a YUV format with
+ * 4:1:1 sub-sampling
+ * @format: pixel format
+ *
+ * Returns:
+ * A boolean indicating whether the format is a YUV format with 4:1:1
+ * sub-sampling.
+ */
+bool drm_format_is_yuv_sampling_411(uint32_t format)
+{
+ const struct drm_format_info *info;
+
+ info = drm_format_info(format);
+ if (!info)
+ return false;
+
+ return drm_format_info_is_yuv_sampling_411(info);
+}
+EXPORT_SYMBOL(drm_format_is_yuv_sampling_411);
+
+/**
+ * drm_format_is_yuv_sampling_420 - check that the format is a YUV format with
+ * 4:2:0 sub-sampling
+ * @format: pixel format
+ *
+ * Returns:
+ * A boolean indicating whether the format is a YUV format with 4:2:0
+ * sub-sampling.
+ */
+bool drm_format_is_yuv_sampling_420(uint32_t format)
+{
+ const struct drm_format_info *info;
+
+ info = drm_format_info(format);
+ if (!info)
+ return false;
+
+ return drm_format_info_is_yuv_sampling_420(info);
+}
+EXPORT_SYMBOL(drm_format_is_yuv_sampling_420);
+
+/**
+ * drm_format_is_yuv_sampling_422 - check that the format is a YUV format with
+ * 4:2:2 sub-sampling
+ * @format: pixel format
+ *
+ * Returns:
+ * A boolean indicating whether the format is a YUV format with 4:2:2
+ * sub-sampling.
+ */
+bool drm_format_is_yuv_sampling_422(uint32_t format)
+{
+ const struct drm_format_info *info;
+
+ info = drm_format_info(format);
+ if (!info)
+ return false;
+
+ return drm_format_info_is_yuv_sampling_422(info);
+}
+EXPORT_SYMBOL(drm_format_is_yuv_sampling_422);
+
+/**
+ * drm_format_is_yuv_sampling_444 - check that the format is a YUV format with
+ * 4:4:4 sub-sampling
+ * @format: pixel format
+ *
+ * Returns:
+ * A boolean indicating whether the format is a YUV format with 4:4:4
+ * sub-sampling.
+ */
+bool drm_format_is_yuv_sampling_444(uint32_t format)
+{
+ const struct drm_format_info *info;
+
+ info = drm_format_info(format);
+ if (!info)
+ return false;
+
+ return drm_format_info_is_yuv_sampling_444(info);
+}
+EXPORT_SYMBOL(drm_format_is_yuv_sampling_444);
+
/**
* drm_format_info_block_width - width in pixels of block.
* @info: pixel format info
diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h
index d170b7b323f7..cf082d8b6ad4 100644
--- a/include/drm/drm_fourcc.h
+++ b/include/drm/drm_fourcc.h
@@ -278,6 +278,11 @@ bool drm_format_is_yuv(uint32_t format);
bool drm_format_is_yuv_packed(uint32_t format);
bool drm_format_is_yuv_semiplanar(uint32_t format);
bool drm_format_is_yuv_planar(uint32_t format);
+bool drm_format_is_yuv_sampling_410(uint32_t format);
+bool drm_format_is_yuv_sampling_411(uint32_t format);
+bool drm_format_is_yuv_sampling_420(uint32_t format);
+bool drm_format_is_yuv_sampling_422(uint32_t format);
+bool drm_format_is_yuv_sampling_444(uint32_t format);
unsigned int drm_format_info_block_width(const struct drm_format_info *info,
int plane);
unsigned int drm_format_info_block_height(const struct drm_format_info *info,
--
2.19.1
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