linux-kernel - [PATCH v2 1/4] media: uvcvideo: Add missing value for power_line

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Message-Id: <20220519181306.42136-2-ribalda@chromium.org>
Date:   Thu, 19 May 2022 20:13:03 +0200
From:   Ricardo Ribalda <ribalda@...omium.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Tomasz Figa <tfiga@...omium.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Yunke Cao <yunkec@...gle.com>
Cc:     Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2 1/4] 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@...omium.org>
---

v2: Thanks Laurent

uvc 1.1 only has 3 values, do not break those devices.

 drivers/media/usb/uvc/uvc_ctrl.c | 67 ++++++++++++++++++++++++++------
 1 file changed, 55 insertions(+), 12 deletions(-)

diff --git a/drivers/media/usb/uvc/uvc_ctrl.c b/drivers/media/usb/uvc/uvc_ctrl.c
index b4f6edf968bc..a942021dfbe1 100644
--- a/drivers/media/usb/uvc/uvc_ctrl.c
+++ b/drivers/media/usb/uvc/uvc_ctrl.c
@@ -362,12 +362,19 @@ static const u32 uvc_control_classes[] = {
 	V4L2_CID_USER_CLASS,
 };
 
-static const struct uvc_menu_info power_line_frequency_controls[] = {
+static const struct uvc_menu_info power_line_frequency_controls_uvc11[] = {
 	{ 0, "Disabled" },
 	{ 1, "50 Hz" },
 	{ 2, "60 Hz" },
 };
 
+static const struct uvc_menu_info power_line_frequency_controls_uvc15[] = {
+	{ 0, "Disabled" },
+	{ 1, "50 Hz" },
+	{ 2, "60 Hz" },
+	{ 3, "Auto" },
+};
+
 static const struct uvc_menu_info exposure_auto_controls[] = {
 	{ 2, "Auto Mode" },
 	{ 1, "Manual Mode" },
@@ -504,17 +511,6 @@ 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 +726,32 @@ static const struct uvc_control_mapping uvc_ctrl_mappings[] = {
 	},
 };
 
+static const
+struct uvc_control_mapping 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_uvc11,
+	.menu_count	= ARRAY_SIZE(power_line_frequency_controls_uvc11),
+};
+
+static const
+struct uvc_control_mapping 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_uvc15,
+	.menu_count	= ARRAY_SIZE(power_line_frequency_controls_uvc15),
+};
+
 /* ------------------------------------------------------------------------
  * Utility functions
  */
@@ -2366,6 +2388,22 @@ static void uvc_ctrl_prune_entity(struct uvc_device *dev,
 	}
 }
 
+/*
+ * The powerline control has different valid values depending on the
+ * uvc version.
+ */
+static void uvc_ctrl_init_powerline(struct uvc_video_chain *chain,
+				    struct uvc_control *ctrl)
+{
+	if (chain->dev->uvc_version < 0x0150) {
+		__uvc_ctrl_add_mapping(chain, ctrl,
+				       &power_line_mapping_uvc11);
+		return;
+	}
+
+	__uvc_ctrl_add_mapping(chain, ctrl, &power_line_mapping_uvc15);
+}
+
 /*
  * Add control information and hardcoded stock control mappings to the given
  * device.
@@ -2375,6 +2413,7 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
 {
 	const struct uvc_control_info *info = uvc_ctrls;
 	const struct uvc_control_info *iend = info + ARRAY_SIZE(uvc_ctrls);
+	static const u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING;
 	const struct uvc_control_mapping *mapping = uvc_ctrl_mappings;
 	const struct uvc_control_mapping *mend =
 		mapping + ARRAY_SIZE(uvc_ctrl_mappings);
@@ -2405,6 +2444,10 @@ static void uvc_ctrl_init_ctrl(struct uvc_video_chain *chain,
 	if (!ctrl->initialized)
 		return;
 
+	if (uvc_entity_match_guid(ctrl->entity, uvc_processing_guid) &&
+	    ctrl->info.selector == UVC_PU_POWER_LINE_FREQUENCY_CONTROL)
+		return uvc_ctrl_init_powerline(chain, ctrl);
+
 	for (; mapping < mend; ++mapping) {
 		if (uvc_entity_match_guid(ctrl->entity, mapping->entity) &&
 		    ctrl->info.selector == mapping->selector)
-- 
2.36.1.124.g0e6072fb45-goog