2023-01-05 13:59:23

by Ricardo Ribalda

Subject: [PATCH v2 4/7] media: uvcvideo: Refactor uvc_ctrl_mappings_uvcXX

Convert the array of structs into an array of pointers, that way the
mappings can be reused.

Signed-off-by: Ricardo Ribalda <[email protected]>
---
drivers/media/usb/uvc/uvc_ctrl.c | 81 +++++++++++++++++++---------------------
1 file changed, 39 insertions(+), 42 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index 2ebe5cc18ad9..9af64f7a23d3 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -723,34 +723,40 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
},
};

-static const struct uvc_control_mapping uvc_ctrl_mappings_uvc11[] = {
- {
- .id = V4L2_CID_POWER_LINE_FREQUENCY,
- .entity = UVC_GUID_UVC_PROCESSING,
- .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
- .size = 2,
- .offset = 0,
- .v4l2_type = V4L2_CTRL_TYPE_MENU,
- .data_type = UVC_CTRL_DATA_TYPE_ENUM,
- .menu_info = power_line_frequency_controls,
- .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
- V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
- },
+static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11 = {
+ .id = V4L2_CID_POWER_LINE_FREQUENCY,
+ .entity = UVC_GUID_UVC_PROCESSING,
+ .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
+ .size = 2,
+ .offset = 0,
+ .v4l2_type = V4L2_CTRL_TYPE_MENU,
+ .data_type = UVC_CTRL_DATA_TYPE_ENUM,
+ .menu_info = power_line_frequency_controls,
+ .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
+ V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
};

-static const struct uvc_control_mapping uvc_ctrl_mappings_uvc15[] = {
- {
- .id = V4L2_CID_POWER_LINE_FREQUENCY,
- .entity = UVC_GUID_UVC_PROCESSING,
- .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
- .size = 2,
- .offset = 0,
- .v4l2_type = V4L2_CTRL_TYPE_MENU,
- .data_type = UVC_CTRL_DATA_TYPE_ENUM,
- .menu_info = power_line_frequency_controls,
- .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
- V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
- },
+static const struct uvc_control_mapping *uvc_ctrl_mappings_uvc11[] = {
+ &uvc_ctrl_power_line_mapping_uvc11,
+ NULL, /* Sentinel */
+};
+
+static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc15 = {
+ .id = V4L2_CID_POWER_LINE_FREQUENCY,
+ .entity = UVC_GUID_UVC_PROCESSING,
+ .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
+ .size = 2,
+ .offset = 0,
+ .v4l2_type = V4L2_CTRL_TYPE_MENU,
+ .data_type = UVC_CTRL_DATA_TYPE_ENUM,
+ .menu_info = power_line_frequency_controls,
+ .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
+ V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
+};
+
+static const struct uvc_control_mapping *uvc_ctrl_mappings_uvc15[] = {
+ &uvc_ctrl_power_line_mapping_uvc15,
+ NULL, /* Sentinel */
};

/* ------------------------------------------------------------------------
@@ -2506,8 +2512,7 @@ static void uvc_ctrl_prune_entity(struct uvc_device *dev,
static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
struct uvc_control *ctrl)
{
- const struct uvc_control_mapping *mappings;
- unsigned int num_mappings;
+ const struct uvc_control_mapping **mappings;
unsigned int i;

/*
@@ -2574,21 +2579,13 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
}

/* Finally process version-specific mappings. */
- if (chain->dev->uvc_version < 0x0150) {
- mappings = uvc_ctrl_mappings_uvc11;
- num_mappings = ARRAY_SIZE(uvc_ctrl_mappings_uvc11);
- } else {
- mappings = uvc_ctrl_mappings_uvc15;
- num_mappings = ARRAY_SIZE(uvc_ctrl_mappings_uvc15);
- }
-
- for (i = 0; i < num_mappings; ++i) {
- const struct uvc_control_mapping *mapping = &mappings[i];
+ mappings = (chain->dev->uvc_version < 0x0150) ? uvc_ctrl_mappings_uvc11
+ : uvc_ctrl_mappings_uvc15;

- if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
- ctrl->info.selector == mapping->selector)
- __uvc_ctrl_add_mapping(chain, ctrl, mapping);
- }
+ for (i = 0; mappings[i]; ++i)
+ if (uvc_entity_match_guid(ctrl->entity, mappings[i]->entity) &&
+ ctrl->info.selector == mappings[i]->selector)
+ __uvc_ctrl_add_mapping(chain, ctrl, mappings[i]);
}

/*

--
2.39.0.314.g84b9a713c41-goog-b4-0.11.0-dev-696ae

2023-01-06 21:11:52

by Laurent Pinchart

Subject: Re: [PATCH v2 4/7] media: uvcvideo: Refactor uvc_ctrl_mappings_uvcXX

Hi Ricardo,

Thank you for the patch.

On Thu, Jan 05, 2023 at 02:52:55PM +0100, Ricardo Ribalda wrote:
> Convert the array of structs into an array of pointers, that way the
> mappings can be reused.
>
> Signed-off-by: Ricardo Ribalda <[email protected]>
> ---
> drivers/media/usb/uvc/uvc_ctrl.c | 81 +++++++++++++++++++---------------------
> 1 file changed, 39 insertions(+), 42 deletions(-)
>
> diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
> index 2ebe5cc18ad9..9af64f7a23d3 100644
> --- a/drivers/media/usb/uvc/uvc_ctrl.c
> +++ b/drivers/media/usb/uvc/uvc_ctrl.c
> @@ -723,34 +723,40 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
> },
> };
>
> -static const struct uvc_control_mapping uvc_ctrl_mappings_uvc11[] = {
> - {
> - .id = V4L2_CID_POWER_LINE_FREQUENCY,
> - .entity = UVC_GUID_UVC_PROCESSING,
> - .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
> - .size = 2,
> - .offset = 0,
> - .v4l2_type = V4L2_CTRL_TYPE_MENU,
> - .data_type = UVC_CTRL_DATA_TYPE_ENUM,
> - .menu_info = power_line_frequency_controls,
> - .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
> - V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
> - },
> +static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc11 = {
> + .id = V4L2_CID_POWER_LINE_FREQUENCY,
> + .entity = UVC_GUID_UVC_PROCESSING,
> + .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
> + .size = 2,
> + .offset = 0,
> + .v4l2_type = V4L2_CTRL_TYPE_MENU,
> + .data_type = UVC_CTRL_DATA_TYPE_ENUM,
> + .menu_info = power_line_frequency_controls,
> + .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
> + V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
> };
>
> -static const struct uvc_control_mapping uvc_ctrl_mappings_uvc15[] = {
> - {
> - .id = V4L2_CID_POWER_LINE_FREQUENCY,
> - .entity = UVC_GUID_UVC_PROCESSING,
> - .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
> - .size = 2,
> - .offset = 0,
> - .v4l2_type = V4L2_CTRL_TYPE_MENU,
> - .data_type = UVC_CTRL_DATA_TYPE_ENUM,
> - .menu_info = power_line_frequency_controls,
> - .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
> - V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
> - },
> +static const struct uvc_control_mapping *uvc_ctrl_mappings_uvc11[] = {
> + &uvc_ctrl_power_line_mapping_uvc11,
> + NULL, /* Sentinel */
> +};
> +
> +static const struct uvc_control_mapping uvc_ctrl_power_line_mapping_uvc15 = {
> + .id = V4L2_CID_POWER_LINE_FREQUENCY,
> + .entity = UVC_GUID_UVC_PROCESSING,
> + .selector = UVC_PU_POWER_LINE_FREQUENCY_CONTROL,
> + .size = 2,
> + .offset = 0,
> + .v4l2_type = V4L2_CTRL_TYPE_MENU,
> + .data_type = UVC_CTRL_DATA_TYPE_ENUM,
> + .menu_info = power_line_frequency_controls,
> + .menu_mask = GENMASK(V4L2_CID_POWER_LINE_FREQUENCY_AUTO,
> + V4L2_CID_POWER_LINE_FREQUENCY_DISABLED),
> +};
> +
> +static const struct uvc_control_mapping *uvc_ctrl_mappings_uvc15[] = {
> + &uvc_ctrl_power_line_mapping_uvc15,
> + NULL, /* Sentinel */
> };
>
> /* ------------------------------------------------------------------------
> @@ -2506,8 +2512,7 @@ static void uvc_ctrl_prune_entity(struct uvc_device *dev,
> static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
> struct uvc_control *ctrl)
> {
> - const struct uvc_control_mapping *mappings;
> - unsigned int num_mappings;
> + const struct uvc_control_mapping **mappings;
> unsigned int i;
>
> /*
> @@ -2574,21 +2579,13 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
> }
>
> /* Finally process version-specific mappings. */
> - if (chain->dev->uvc_version < 0x0150) {
> - mappings = uvc_ctrl_mappings_uvc11;
> - num_mappings = ARRAY_SIZE(uvc_ctrl_mappings_uvc11);
> - } else {
> - mappings = uvc_ctrl_mappings_uvc15;
> - num_mappings = ARRAY_SIZE(uvc_ctrl_mappings_uvc15);
> - }
> -
> - for (i = 0; i < num_mappings; ++i) {
> - const struct uvc_control_mapping *mapping = &mappings[i];
> + mappings = (chain->dev->uvc_version < 0x0150) ? uvc_ctrl_mappings_uvc11

No need for parentheses.

> + : uvc_ctrl_mappings_uvc15;
>
> - if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
> - ctrl->info.selector == mapping->selector)
> - __uvc_ctrl_add_mapping(chain, ctrl, mapping);
> - }
> + for (i = 0; mappings[i]; ++i)

Missing curly braces.

Let's add a local mapping variable:

for (i = 0; mappings[i]; ++i) {
const struct uvc_control_mapping *mapping = &mappings[i];

if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
ctrl->info.selector == mapping->selector)
__uvc_ctrl_add_mapping(chain, ctrl, mapping);
}

I'll address this when applying.

Reviewed-by: Laurent Pinchart <[email protected]>

> + if (uvc_entity_match_guid(ctrl->entity, mappings[i]->entity) &&
> + ctrl->info.selector == mappings[i]->selector)
> + __uvc_ctrl_add_mapping(chain, ctrl, mappings[i]);
> }
>
> /*
>

--
Regards,

Laurent Pinchart