Fix bug in nt35560_set_brightness() which causes the function to
erroneously report an error. mipi_dsi_dcs_write() returns either a
negative value when an error occurred or a positive number of bytes
written when no error occurred. The buggy code reports an error under
either condition.
Fixes: 8152c2bfd780 ("drm/panel: Add driver for Sony ACX424AKP panel")
Reviewed-by: Douglas Anderson <diand...@chromium.org>
Reviewed-by: Neil Armstrong <neil.armstr...@linaro.org>
Signed-off-by: Brigham Campbell <m...@brighamcampbell.com>
---
drivers/gpu/drm/panel/panel-novatek-nt35560.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35560.c
b/drivers/gpu/drm/panel/panel-novatek-nt35560.c
index 98f0782c8411..17898a29efe8 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt35560.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt35560.c
@@ -161,7 +161,7 @@ static int nt35560_set_brightness(struct backlight_device
*bl)
par = 0x00;
ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,
&par, 1);
- if (ret) {
+ if (ret < 0) {
dev_err(nt->dev, "failed to disable display backlight
(%d)\n", ret);
return ret;
}
--
2.50.1
