linux-kernel - [PATCH v3 1/9] media: subdev: Add privacy led helpers

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Message-Id: <20240410-enable-streams-impro-v3-1-e5e7a5da7420@ideasonboard.com>
Date: Wed, 10 Apr 2024 15:35:48 +0300
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Hans Verkuil <hverkuil@...all.nl>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Umang Jain <umang.jain@...asonboard.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH v3 1/9] media: subdev: Add privacy led helpers

Add helper functions to enable and disable the privacy led. This moves
the #if from the call site to the privacy led functions, and makes
adding privacy led support to v4l2_subdev_enable/disable_streams()
cleaner.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 drivers/media/v4l2-core/v4l2-subdev.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 012b757eac9f..13957543d153 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -148,6 +148,23 @@ static int subdev_close(struct file *file)
 }
 #endif /* CONFIG_VIDEO_V4L2_SUBDEV_API */
 
+static void v4l2_subdev_enable_privacy_led(struct v4l2_subdev *sd)
+{
+#if IS_REACHABLE(CONFIG_LEDS_CLASS)
+	if (!IS_ERR_OR_NULL(sd->privacy_led))
+		led_set_brightness(sd->privacy_led,
+				   sd->privacy_led->max_brightness);
+#endif
+}
+
+static void v4l2_subdev_disable_privacy_led(struct v4l2_subdev *sd)
+{
+#if IS_REACHABLE(CONFIG_LEDS_CLASS)
+	if (!IS_ERR_OR_NULL(sd->privacy_led))
+		led_set_brightness(sd->privacy_led, 0);
+#endif
+}
+
 static inline int check_which(u32 which)
 {
 	if (which != V4L2_SUBDEV_FORMAT_TRY &&
@@ -422,15 +439,10 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable)
 	if (!ret) {
 		sd->enabled_streams = enable ? BIT(0) : 0;
 
-#if IS_REACHABLE(CONFIG_LEDS_CLASS)
-		if (!IS_ERR_OR_NULL(sd->privacy_led)) {
-			if (enable)
-				led_set_brightness(sd->privacy_led,
-						   sd->privacy_led->max_brightness);
-			else
-				led_set_brightness(sd->privacy_led, 0);
-		}
-#endif
+		if (enable)
+			v4l2_subdev_enable_privacy_led(sd);
+		else
+			v4l2_subdev_disable_privacy_led(sd);
 	}
 
 	return ret;

-- 
2.34.1