From: Ian Ray <ian....@ge.com>
Enable display backlight only if a message needs to be displayed.
The kernel re-initializes the backlight, which results in some
unwanted artifacts.
Signed-off-by: Ian Ray <ian....@ge.com>
Signed-off-by: Sebastian Reichel <sebastian.reic...@collabora.co.uk>
---
board/ge/bx50v3/bx50v3.c | 43 ++++++++++++++++++++++++++-----------------
include/configs/ge_bx50v3.h | 1 +
2 files changed, 27 insertions(+), 17 deletions(-)
diff --git a/board/ge/bx50v3/bx50v3.c b/board/ge/bx50v3/bx50v3.c
index c7a29185bf49..35efe159d598 100644
--- a/board/ge/bx50v3/bx50v3.c
+++ b/board/ge/bx50v3/bx50v3.c
@@ -786,23 +786,6 @@ int board_late_init(void)
add_board_boot_modes(board_boot_modes);
#endif
-#ifdef CONFIG_VIDEO_IPUV3
- /* We need at least 200ms between power on and backlight on
- * as per specifications from CHI MEI */
- mdelay(250);
-
- /* enable backlight PWM 1 */
- pwm_init(0, 0, 0);
-
- /* duty cycle 5000000ns, period: 5000000ns */
- pwm_config(0, 5000000, 5000000);
-
- /* Backlight Power */
- gpio_direction_output(LVDS_BACKLIGHT_GP, 1);
-
- pwm_enable(0);
-#endif
-
/* board specific pmic init */
pmic_init();
@@ -843,3 +826,29 @@ int checkboard(void)
printf("BOARD: %s\n", CONFIG_BOARD_NAME);
return 0;
}
+
+static int do_backlight_enable(void)
+{
+#ifdef CONFIG_VIDEO_IPUV3
+ /* We need at least 200ms between power on and backlight on
+ * as per specifications from CHI MEI */
+ mdelay(250);
+
+ /* enable backlight PWM 1 */
+ pwm_init(0, 0, 0);
+
+ /* duty cycle 5000000ns, period: 5000000ns */
+ pwm_config(0, 5000000, 5000000);
+
+ /* Backlight Power */
+ gpio_direction_output(LVDS_BACKLIGHT_GP, 1);
+
+ pwm_enable(0);
+#endif
+}
+
+U_BOOT_CMD(
+ bx50_backlight_enable, 1, 1, do_backlight_enable,
+ "enable Bx50 backlight",
+ "no parameters"
+);
diff --git a/include/configs/ge_bx50v3.h b/include/configs/ge_bx50v3.h
index cbfe30d536d0..925507fe81f1 100644
--- a/include/configs/ge_bx50v3.h
+++ b/include/configs/ge_bx50v3.h
@@ -128,6 +128,7 @@
"swappartitions=" \
"setexpr partnum 3 - ${partnum}\0" \
"failbootcmd=" \
+ "bx50_backlight_enable; " \
"msg=\"Monitor failed to start. Try again, or contact GE
Service for support.\"; " \
"echo $msg; " \
"setenv stdout vga; " \
--
2.16.1
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