[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <1466402029-23252-1-git-send-email-simhavcs@gmail.com>
Date: Mon, 20 Jun 2016 11:23:48 +0530
From: Vinay Simha BN <simhavcs@...il.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Vinay Simha BN <simhavcs@...il.com>,
John Stultz <john.stultz@...aro.org>,
Sumit Semwal <sumit.semwal@...aro.org>,
Archit Taneja <archit.taneja@...il.com>,
Rob Clark <robdclark@...il.com>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Thierry Reding <thierry.reding@...il.com>,
David Airlie <airlied@...ux.ie>,
dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS),
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v2 1/2] drm/dsi: Implement dcs set/get display brightness
Provide a small convenience wrapper that set/get the
display brightness value
Cc: John Stultz <john.stultz@...aro.org>
Cc: Sumit Semwal <sumit.semwal@...aro.org>
Cc: Archit Taneja <archit.taneja@...il.com>
Cc: Rob Clark <robdclark@...il.com>
Cc: Jani Nikula <jani.nikula@...ux.intel.com>
Cc: Thierry Reding <thierry.reding@...il.com>
Signed-off-by: Vinay Simha BN <simhavcs@...il.com>
---
v1:
*tested in nexus7 2nd gen.
v2:
* implemented jani review comments
-functions name mapped accordingly
-bl value increased from 0xff to 0xffff
-backlight interface will be handled in panel driver,
so it is moved from the mipi_dsi helper function
---
drivers/gpu/drm/drm_mipi_dsi.c | 49 ++++++++++++++++++++++++++++++++++++++++++
include/drm/drm_mipi_dsi.h | 4 ++++
2 files changed, 53 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index 49311fc..2c03784 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -1041,6 +1041,55 @@ int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format)
}
EXPORT_SYMBOL(mipi_dsi_dcs_set_pixel_format);
+/**
+ * mipi_dsi_dcs_get_display_brightness() - gets the current brightness value
+ * of the display
+ * @dsi: DSI peripheral device
+ * @brightness: brightness value
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,
+ u16 *brightness)
+{
+ ssize_t err;
+
+ err = mipi_dsi_dcs_read(dsi, MIPI_DCS_GET_DISPLAY_BRIGHTNESS,
+ brightness, sizeof(*brightness));
+ if (err < 0) {
+ if (err == 0)
+ err = -ENODATA;
+
+ return err;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_get_display_brightness);
+
+/**
+ * mipi_dsi_dcs_set_display_brightness() - sets the brightness value of
+ * the display
+ * @dsi: DSI peripheral device
+ * @brightness: brightness value
+ *
+ * Return: 0 on success or a negative error code on failure.
+ */
+int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,
+ u16 brightness)
+{
+ ssize_t err;
+ u8 bl_value[2] = { brightness & 0xff, brightness >> 8 };
+
+ err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
+ bl_value, sizeof(bl_value));
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_set_display_brightness);
+
static int mipi_dsi_drv_probe(struct device *dev)
{
struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver);
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 72f5b15..4d77bb0 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -270,6 +270,10 @@ int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
enum mipi_dsi_dcs_tear_mode mode);
int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format);
+int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,
+ u16 *brightness);
+int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,
+ u16 brightness);
/**
* struct mipi_dsi_driver - DSI driver
--
2.1.2
Powered by blists - more mailing lists