diff options
Diffstat (limited to 'drivers/video/sunxi_display.c')
| -rw-r--r-- | drivers/video/sunxi_display.c | 54 |
1 files changed, 49 insertions, 5 deletions
diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c index f5f24fc..4e12150 100644 --- a/drivers/video/sunxi_display.c +++ b/drivers/video/sunxi_display.c @@ -18,6 +18,7 @@ #include <errno.h> #include <fdtdec.h> #include <fdt_support.h> +#include <i2c.h> #include <video_fb.h> #include "videomodes.h" #include "hitachi_tx18d42vm_lcd.h" @@ -46,6 +47,7 @@ struct sunxi_display { GraphicDevice graphic_device; enum sunxi_monitor monitor; unsigned int depth; + unsigned int fb_size; } sunxi_display; #ifdef CONFIG_VIDEO_HDMI @@ -591,7 +593,7 @@ static void sunxi_lcdc_enable(void) static void sunxi_lcdc_panel_enable(void) { - int pin; + int pin, reset_pin; /* * Start with backlight disabled to avoid the screen flashing to @@ -609,6 +611,12 @@ static void sunxi_lcdc_panel_enable(void) gpio_direction_output(pin, PWM_OFF); } + reset_pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_RESET); + if (reset_pin != -1) { + gpio_request(reset_pin, "lcd_reset"); + gpio_direction_output(reset_pin, 0); /* Assert reset */ + } + /* Give the backlight some time to turn off and power up the panel. */ mdelay(40); pin = sunxi_name_to_gpio(CONFIG_VIDEO_LCD_POWER); @@ -616,6 +624,9 @@ static void sunxi_lcdc_panel_enable(void) gpio_request(pin, "lcd_power"); gpio_direction_output(pin, 1); } + + if (reset_pin != -1) + gpio_direction_output(reset_pin, 1); /* De-assert reset */ } static void sunxi_lcdc_backlight_enable(void) @@ -1020,6 +1031,12 @@ static void sunxi_mode_set(const struct ctfb_res_modes *mode, mdelay(50); /* Wait for lcd controller power on */ hitachi_tx18d42vm_init(); } + if (IS_ENABLED(CONFIG_VIDEO_LCD_TL059WV5C0)) { + unsigned int orig_i2c_bus = i2c_get_bus_num(); + i2c_set_bus_num(CONFIG_VIDEO_LCD_I2C_BUS); + i2c_reg_write(0x5c, 0x04, 0x42); /* Turn on the LCD */ + i2c_set_bus_num(orig_i2c_bus); + } sunxi_composer_mode_set(mode, address); sunxi_lcdc_tcon0_mode_set(mode, false); sunxi_composer_enable(); @@ -1060,6 +1077,11 @@ static const char *sunxi_get_mon_desc(enum sunxi_monitor monitor) return NULL; /* never reached */ } +ulong board_get_usable_ram_top(ulong total_size) +{ + return gd->ram_top - CONFIG_SUNXI_MAX_FB_SIZE; +} + void *video_hw_init(void) { static GraphicDevice *graphic_device = &sunxi_display.graphic_device; @@ -1075,10 +1097,6 @@ void *video_hw_init(void) memset(&sunxi_display, 0, sizeof(struct sunxi_display)); - printf("Reserved %dkB of RAM for Framebuffer.\n", - CONFIG_SUNXI_FB_SIZE >> 10); - gd->fb_base = gd->ram_top; - video_get_ctfb_res_modes(RES_MODE_1024x768, 24, &mode, &sunxi_display.depth, &options); #ifdef CONFIG_VIDEO_HDMI @@ -1169,6 +1187,17 @@ void *video_hw_init(void) mode->yres, sunxi_get_mon_desc(sunxi_display.monitor)); } + sunxi_display.fb_size = + (mode->xres * mode->yres * 4 + 0xfff) & ~0xfff; + if (sunxi_display.fb_size > CONFIG_SUNXI_MAX_FB_SIZE) { + printf("Error need %dkB for fb, but only %dkB is reserved\n", + sunxi_display.fb_size >> 10, + CONFIG_SUNXI_MAX_FB_SIZE >> 10); + return NULL; + } + + gd->fb_base = gd->bd->bi_dram[0].start + + gd->bd->bi_dram[0].size - sunxi_display.fb_size; sunxi_engines_init(); sunxi_mode_set(mode, gd->fb_base - CONFIG_SYS_SDRAM_BASE); @@ -1194,6 +1223,7 @@ int sunxi_simplefb_setup(void *blob) { static GraphicDevice *graphic_device = &sunxi_display.graphic_device; int offset, ret; + u64 start, size; const char *pipeline = NULL; #ifdef CONFIG_MACH_SUN4I @@ -1237,6 +1267,20 @@ int sunxi_simplefb_setup(void *blob) return 0; /* Keep older kernels working */ } + /* + * Do not report the framebuffer as free RAM to the OS, note we cannot + * use fdt_add_mem_rsv() here, because then it is still seen as RAM, + * and e.g. Linux refuses to iomap RAM on ARM, see: + * linux/arch/arm/mm/ioremap.c around line 301. + */ + start = gd->bd->bi_dram[0].start; + size = gd->bd->bi_dram[0].size - sunxi_display.fb_size; + ret = fdt_fixup_memory_banks(blob, &start, &size, 1); + if (ret) { + eprintf("Cannot setup simplefb: Error reserving memory\n"); + return ret; + } + ret = fdt_setup_simplefb_node(blob, offset, gd->fb_base, graphic_device->winSizeX, graphic_device->winSizeY, graphic_device->winSizeX * graphic_device->gdfBytesPP, |