Expose the necessary configuration parameters in Kconfig.
Add SSD2828 initialization between enabling the parallel LCD
interface and turning on the backlight.
Signed-off-by: Siarhei Siamashka <siarhei.siamas...@gmail.com>
---
board/sunxi/Kconfig | 60 +++++++++++++++++++++++++++++++++++++++++
drivers/video/sunxi_display.c | 3 +++
drivers/video/sunxi_lcd_panel.c | 38 ++++++++++++++++++++++++++
drivers/video/sunxi_lcd_panel.h | 3 +++
4 files changed, 104 insertions(+)
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
index adee5ed..92dbce7 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -345,6 +345,60 @@ config VIDEO_LCD_BL_PWM
Set the backlight pwm pin for the LCD panel. This takes a string in the
format understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H.
+config VIDEO_LCD_SPI_CS
+ string "SPI CS pin for LCD related config job"
+ depends on VIDEO_LCD_SSD2828
+ default ""
+ ---help---
+ This is one of the SPI communication pins, involved in setting up a
+ working LCD configuration. The exact role of SPI may differ for
+ different hardware setups. The option takes a string in the format
+ understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H.
+
+config VIDEO_LCD_SPI_SCLK
+ string "SPI SCLK pin for LCD related config job"
+ depends on VIDEO_LCD_SSD2828
+ default ""
+ ---help---
+ This is one of the SPI communication pins, involved in setting up a
+ working LCD configuration. The exact role of SPI may differ for
+ different hardware setups. The option takes a string in the format
+ understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H.
+
+config VIDEO_LCD_SPI_MOSI
+ string "SPI MOSI pin for LCD related config job"
+ depends on VIDEO_LCD_SSD2828
+ default ""
+ ---help---
+ This is one of the SPI communication pins, involved in setting up a
+ working LCD configuration. The exact role of SPI may differ for
+ different hardware setups. The option takes a string in the format
+ understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H.
+
+config VIDEO_LCD_SPI_MISO
+ string "SPI MISO pin for LCD related config job (optional)"
+ depends on VIDEO_LCD_SSD2828
+ default ""
+ ---help---
+ This is one of the SPI communication pins, involved in setting up a
+ working LCD configuration. The exact role of SPI may differ for
+ different hardware setups. If wired up, this pin may provide additional
+ useful functionality. Such as bi-directional communication with the
+ hardware and LCD panel id retrieval (if the panel can report it). The
+ option takes a string in the format understood by sunxi_name_to_gpio,
+ e.g. PH1 for pin 1 of port H.
+
+config VIDEO_LCD_SSD2828_RESET
+ string "RESET pin of SSD2828"
+ depends on VIDEO_LCD_SSD2828
+ default ""
+ ---help---
+ The reset pin of SSD2828 chip. This takes a string in the format
+ understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H.
+
+config VIDEO_LCD_SSD2828
+ bool
+ select VIDEO_LCD_IF_PARALLEL
# Note only one of these may be selected at a time! But hidden choices are
# not supported by Kconfig
@@ -373,6 +427,12 @@ config VIDEO_LCD_PANEL_HITACHI_TX18D42VM
bool "Hitachi tx18d42vm LCD panel"
select VIDEO_LCD_IF_LVDS
+config VIDEO_LCD_PANEL_MIPI_4_LANE_513_MBPS_VIA_SSD2828
+ bool "MIPI 4-lane, 513Mbps LCD panel via SSD2828 bridge chip"
+ select VIDEO_LCD_SSD2828
+ ---help---
+ 7.85" 768x1024 LCD panels, such as LG LP079X01 or AUO B079XAN01.0
+
endchoice
diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c
index c3fc732..f11b241 100644
--- a/drivers/video/sunxi_display.c
+++ b/drivers/video/sunxi_display.c
@@ -850,6 +850,9 @@ static void sunxi_mode_set(const struct ctfb_res_modes
*mode,
sunxi_lcdc_tcon0_mode_set(mode);
sunxi_composer_enable();
sunxi_lcdc_enable();
+#ifdef CONFIG_VIDEO_LCD_SSD2828
+ sunxi_ssd2828_init(mode);
+#endif
sunxi_lcdc_backlight_enable();
break;
case sunxi_monitor_vga:
diff --git a/drivers/video/sunxi_lcd_panel.c b/drivers/video/sunxi_lcd_panel.c
index 9ebaff2..cdde639 100644
--- a/drivers/video/sunxi_lcd_panel.c
+++ b/drivers/video/sunxi_lcd_panel.c
@@ -11,6 +11,8 @@
#include <asm/arch/gpio.h>
#include <asm/gpio.h>
#include <asm/io.h>
+#include "sunxi_lcd_panel.h"
+#include "ssd2828.h"
#ifdef CONFIG_VIDEO_LCD_PANEL_HITACHI_TX18D42VM
@@ -66,3 +68,39 @@ void sunxi_lcd_panel_hitachi_tx18d42vm_init(void)
}
#endif
+
+#ifdef CONFIG_VIDEO_LCD_SSD2828
+
+int sunxi_ssd2828_init(const struct ctfb_res_modes *mode)
+{
+ struct ssd2828_config cfg = {
+ .csx_pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_SPI_CS),
+ .sck_pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_SPI_SCLK),
+ .sdi_pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_SPI_MOSI),
+ .sdo_pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_SPI_MISO),
+ .reset_pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_SSD2828_RESET),
+ .ssd2828_tx_clk_khz = 27000,
+ .ssd2828_color_depth = 24,
+#ifdef CONFIG_VIDEO_LCD_PANEL_MIPI_4_LANE_513_MBPS_VIA_SSD2828
+ .mipi_dsi_number_of_data_lanes = 4,
+ .mipi_dsi_bitrate_per_data_lane_mbps = 513,
+ .mipi_dsi_delay_after_exit_sleep_mode_ms = 100,
+ .mipi_dsi_delay_after_set_display_on_ms = 200
+#else
+#error MIPI LCD panel needs configuration parameters
+#endif
+ };
+
+ if (cfg.csx_pin == -1 || cfg.sck_pin == -1 || cfg.sdi_pin == -1) {
+ printf("SSD2828: SPI pins are not properly configured\n");
+ return 1;
+ }
+ if (cfg.reset_pin == -1) {
+ printf("SSD2828: Reset pin is not properly configured\n");
+ return 1;
+ }
+
+ return ssd2828_init(&cfg, mode);
+}
+
+#endif
diff --git a/drivers/video/sunxi_lcd_panel.h b/drivers/video/sunxi_lcd_panel.h
index 1fb9f1e..8b1bc14 100644
--- a/drivers/video/sunxi_lcd_panel.h
+++ b/drivers/video/sunxi_lcd_panel.h
@@ -6,4 +6,7 @@
* SPDX-License-Identifier: GPL-2.0+
*/
+struct ctfb_res_modes;
+
void sunxi_lcd_panel_hitachi_tx18d42vm_init(void);
+int sunxi_ssd2828_init(const struct ctfb_res_modes *mode);
--
2.0.5
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