media: uvcvideo: Add missing value for power_line_frequency

UVC 1.5 class defines 4 values for this control on:
4.2.2.3.6 Power Line Frequency Control

Add the missing value when the UVC version is 1.5.
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/usb/uvc/uvc_ctrl.c

@@ -366,6 +366,7 @@ static const struct uvc_menu_info power_line_frequency_controls[] = {
 	{ 0, "Disabled" },
 	{ 1, "50 Hz" },
 	{ 2, "60 Hz" },
+	{ 3, "Auto" },
 };
 
 static const struct uvc_menu_info exposure_auto_controls[] = {
@@ -504,17 +505,6 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
 		.v4l2_type	= V4L2_CTRL_TYPE_INTEGER,
 		.data_type	= UVC_CTRL_DATA_TYPE_UNSIGNED,
 	},
-	{
-		.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_count	= ARRAY_SIZE(power_line_frequency_controls),
-	},
 	{
 		.id		= V4L2_CID_HUE_AUTO,
 		.entity		= UVC_GUID_UVC_PROCESSING,
@@ -730,6 +720,34 @@ 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_count	= ARRAY_SIZE(power_line_frequency_controls) - 1,
+	},
+};
+
+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_count	= ARRAY_SIZE(power_line_frequency_controls),
+	},
+};
+
 /* ------------------------------------------------------------------------
  * Utility functions
  */
@@ -2426,6 +2444,22 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
 	if (!ctrl->initialized)
 		return;
 
+	/* Process common mappings first. */
+	for (; mapping < mend; ++mapping) {
+		if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
+		    ctrl->info.selector == mapping->selector)
+			__uvc_ctrl_add_mapping(chain, ctrl, mapping);
+	}
+
+	/* And then version-specific mappings. */
+	if (chain->dev->uvc_version < 0x0150) {
+		mapping = uvc_ctrl_mappings_uvc11;
+		mend = mapping + ARRAY_SIZE(uvc_ctrl_mappings_uvc11);
+	} else {
+		mapping = uvc_ctrl_mappings_uvc15;
+		mend = mapping + ARRAY_SIZE(uvc_ctrl_mappings_uvc15);
+	}
+
 	for (; mapping < mend; ++mapping) {
 		if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
 		    ctrl->info.selector == mapping->selector)