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Subject[PATCH v4 1/4] media: v4l2-ctrl: Move compound control validation
Date
Rework std_validate moving the compound controls to
its own validation function.

While here, fix the pointer math to account the index parameter.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
Changes from v3:
* None.

Changes from v2:
* New patch
---
drivers/media/v4l2-core/v4l2-ctrls.c | 126 +++++++++++++++------------
1 file changed, 69 insertions(+), 57 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 371537dd8cd3..739418aa9108 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1629,10 +1629,77 @@ static void std_log(const struct v4l2_ctrl *ctrl)
})

/* Validate a new control */
+static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
+ union v4l2_ctrl_ptr ptr)
+{
+ struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
+ void *p = ptr.p + idx * ctrl->elem_size;
+
+ switch ((u32)ctrl->type) {
+ case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
+ p_mpeg2_slice_params = p;
+
+ switch (p_mpeg2_slice_params->sequence.chroma_format) {
+ case 1: /* 4:2:0 */
+ case 2: /* 4:2:2 */
+ case 3: /* 4:4:4 */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (p_mpeg2_slice_params->picture.intra_dc_precision) {
+ case 0: /* 8 bits */
+ case 1: /* 9 bits */
+ case 2: /* 10 bits */
+ case 3: /* 11 bits */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (p_mpeg2_slice_params->picture.picture_structure) {
+ case 1: /* interlaced top field */
+ case 2: /* interlaced bottom field */
+ case 3: /* progressive */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (p_mpeg2_slice_params->picture.picture_coding_type) {
+ case V4L2_MPEG2_PICTURE_CODING_TYPE_I:
+ case V4L2_MPEG2_PICTURE_CODING_TYPE_P:
+ case V4L2_MPEG2_PICTURE_CODING_TYPE_B:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
+ break;
+
+ case V4L2_CTRL_TYPE_FWHT_PARAMS:
+ break;
+
+ case V4L2_CTRL_TYPE_H264_SPS:
+ case V4L2_CTRL_TYPE_H264_PPS:
+ case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
+ case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
+ case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
union v4l2_ctrl_ptr ptr)
{
- struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
size_t len;
u64 offset;
s64 val;
@@ -1695,63 +1762,8 @@ static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
return -ERANGE;
return 0;

- case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
- p_mpeg2_slice_params = ptr.p;
-
- switch (p_mpeg2_slice_params->sequence.chroma_format) {
- case 1: /* 4:2:0 */
- case 2: /* 4:2:2 */
- case 3: /* 4:4:4 */
- break;
- default:
- return -EINVAL;
- }
-
- switch (p_mpeg2_slice_params->picture.intra_dc_precision) {
- case 0: /* 8 bits */
- case 1: /* 9 bits */
- case 2: /* 10 bits */
- case 3: /* 11 bits */
- break;
- default:
- return -EINVAL;
- }
-
- switch (p_mpeg2_slice_params->picture.picture_structure) {
- case 1: /* interlaced top field */
- case 2: /* interlaced bottom field */
- case 3: /* progressive */
- break;
- default:
- return -EINVAL;
- }
-
- switch (p_mpeg2_slice_params->picture.picture_coding_type) {
- case V4L2_MPEG2_PICTURE_CODING_TYPE_I:
- case V4L2_MPEG2_PICTURE_CODING_TYPE_P:
- case V4L2_MPEG2_PICTURE_CODING_TYPE_B:
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-
- case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
- return 0;
-
- case V4L2_CTRL_TYPE_FWHT_PARAMS:
- return 0;
-
- case V4L2_CTRL_TYPE_H264_SPS:
- case V4L2_CTRL_TYPE_H264_PPS:
- case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
- case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
- case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
- return 0;
-
default:
- return -EINVAL;
+ return std_validate_compound(ctrl, idx, ptr);
}
}

--
2.20.1
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