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.siamashka@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);