[RFC,v2,2/2] drm/panel: sofef00: Use 16-bit panel brightness

Commit Message

Richard Acayan Jan. 14, 2023, 1 a.m. UTC

These panels communicate brightness in big endian. This is not a quirk
of the panels themselves, but rather, a part of the MIPI standard. Use
the new mipi_dsi_dcs_set_display_brightness_wide() function that
properly handles 16-bit brightness instead of doing special processing
of the brightness values.

Signed-off-by: Richard Acayan <[e-mail]>
---
 drivers/gpu/drm/panel/panel-samsung-sofef00.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

Patch

diff --git a/drivers/gpu/drm/panel/panel-samsung-sofef00.c b/drivers/gpu/drm/panel/panel-samsung-sofef00.c
index 1a0d24595faa..014fe350bc59 100644
--- a/drivers/gpu/drm/panel/panel-samsung-sofef00.c
+++ b/drivers/gpu/drm/panel/panel-samsung-sofef00.c
@@ -10,7 +10,6 @@ 
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
-#include <linux/swab.h>
 #include <linux/backlight.h>
 
 #include <video/mipi_display.h>
@@ -221,13 +220,9 @@  static int sofef00_panel_bl_update_status(struct backlight_device *bl)
 {
 	struct mipi_dsi_device *dsi = bl_get_data(bl);
 	int err;
-	u16 brightness;
+	u16 brightness = (u16)backlight_get_brightness(bl);
 
-	brightness = (u16)backlight_get_brightness(bl);
-	// This panel needs the high and low bytes swapped for the brightness value
-	brightness = __swab16(brightness);
-
-	err = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
+	err = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
 	if (err < 0)
 		return err;