Hi Laurent, Xavier,
Ignore what I wrote before, I read it with the HEVC patch series in mind, not the dw100
series.
So let me try again :-)
On 6/14/22 23:00, Laurent Pinchart wrote:
> Hi Xavier and Hans,
>
> Thank you for the patch.
>
> On Tue, May 03, 2022 at 11:39:19AM +0200, Xavier Roumegue wrote:
>> From: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
>>
>> Add a dynamic array test control to help test support for this
>> feature.
>>
>> Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
>> ---
>> drivers/media/test-drivers/vivid/vivid-ctrls.c | 15 +++++++++++++++
>> 1 file changed, 15 insertions(+)
>>
>> diff --git a/drivers/media/test-drivers/vivid/vivid-ctrls.c b/drivers/media/test-drivers/vivid/vivid-ctrls.c
>> index e7516dc1227b..7267892dc18a 100644
>> --- a/drivers/media/test-drivers/vivid/vivid-ctrls.c
>> +++ b/drivers/media/test-drivers/vivid/vivid-ctrls.c
>> @@ -34,6 +34,7 @@
>> #define VIVID_CID_U8_4D_ARRAY (VIVID_CID_CUSTOM_BASE + 10)
>> #define VIVID_CID_AREA (VIVID_CID_CUSTOM_BASE + 11)
>> #define VIVID_CID_RO_INTEGER (VIVID_CID_CUSTOM_BASE + 12)
>> +#define VIVID_CID_U32_DYN_ARRAY (VIVID_CID_CUSTOM_BASE + 13)
>>
>> #define VIVID_CID_VIVID_BASE (0x00f00000 | 0xf000)
>> #define VIVID_CID_VIVID_CLASS (0x00f00000 | 1)
>> @@ -189,6 +190,19 @@ static const struct v4l2_ctrl_config vivid_ctrl_u32_array = {
>> .dims = { 1 },
>> };
>>
>> +static const struct v4l2_ctrl_config vivid_ctrl_u32_dyn_array = {
>> + .ops = &vivid_user_gen_ctrl_ops,
>> + .id = VIVID_CID_U32_DYN_ARRAY,
>> + .name = "U32 Dynamic Array",
>> + .type = V4L2_CTRL_TYPE_U32,
>> + .flags = V4L2_CTRL_FLAG_DYNAMIC_ARRAY,
>> + .def = 50,
>> + .min = 10,
>> + .max = 90,
>> + .step = 1,
>> + .dims = { 100 },
>> +};
>
> To meaningfully test this, don't we need the vivid driver to change the
> dimension ? Or is it meant to only test changes made by the application
> ?
As I understand it the dw100 driver needs a 2 dimensional array control.
The size is fixed for each resolution, but if the resolution changes, then
this control changes size as well, and it makes sense that when that happens
it is also reset to default values.
So this isn't a dynamic array at all. It is a standard 2 dimensional array.
What is missing in the control framework is a function similar to
v4l2_ctrl_modify_range() that can resize an array.
v4l2_ctrl_modify_dimensions() would be a good name.
I can make something for that if you both agree with this proposal.
Regards,
Hans
>
>> +
>> static const struct v4l2_ctrl_config vivid_ctrl_u16_matrix = {
>> .ops = &vivid_user_gen_ctrl_ops,
>> .id = VIVID_CID_U16_MATRIX,
>> @@ -1612,6 +1626,7 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
>> dev->ro_int32 = v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_ro_int32, NULL);
>> v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_area, NULL);
>> v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_u32_array, NULL);
>> + v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_u32_dyn_array, NULL);
>> v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_u16_matrix, NULL);
>> v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_u8_4d_array, NULL);
>>
>
