Add support for making the visual area of the framebuffer smaller and drawing a black border around it. This is intended for use with overscanning monitors (esp. with composite video out), to avoid part of the picture being invisible.
Signed-off-by: Hans de Goede hdegoede@redhat.com --- doc/README.video | 5 +++++ drivers/video/sunxi_display.c | 48 +++++++++++++++++++++++++++++++++--------- include/configs/sunxi-common.h | 1 + 3 files changed, 44 insertions(+), 10 deletions(-)
diff --git a/doc/README.video b/doc/README.video index 4f7a4b5..62ac17b 100644 --- a/doc/README.video +++ b/doc/README.video @@ -68,6 +68,11 @@ The sunxi u-boot driver supports the following video-mode options: overrides the xres, yres and refresh from the video-mode env. variable. Defaults to edid=1.
+- overscan_x/overscan_y=<int> - Set x/y overscan value + This configures a black border on the left and right resp. top and bottom + to deal with overscanning displays. Defaults to overscan_x=32 and + overscan_y=20 for composite monitors, 0 for other monitors. + For example to always use the hdmi connector, even if no cable is inserted, using edid info when available and otherwise initalizing it at 1024x768@60Hz, use: "setenv video-mode sunxi:1024x768-24@60,monitor=dvi,hpd=0,edid=1". diff --git a/drivers/video/sunxi_display.c b/drivers/video/sunxi_display.c index 1868185..1449e0d 100644 --- a/drivers/video/sunxi_display.c +++ b/drivers/video/sunxi_display.c @@ -19,6 +19,7 @@ #include <fdtdec.h> #include <fdt_support.h> #include <i2c.h> +#include <malloc.h> #include <video_fb.h> #include "videomodes.h" #include "hitachi_tx18d42vm_lcd.h" @@ -51,6 +52,7 @@ struct sunxi_display { GraphicDevice graphic_device; enum sunxi_monitor monitor; unsigned int depth; + unsigned int fb_addr; unsigned int fb_size; } sunxi_display;
@@ -1297,9 +1299,10 @@ void *video_hw_init(void) #ifdef CONFIG_VIDEO_HDMI int ret, hpd, hpd_delay, edid; #endif + int i, overscan_offset, overscan_x, overscan_y; + unsigned int fb_dma_addr; char mon[16]; char *lcd_mode = CONFIG_VIDEO_LCD_MODE; - int i;
memset(&sunxi_display, 0, sizeof(struct sunxi_display));
@@ -1310,6 +1313,8 @@ void *video_hw_init(void) hpd_delay = video_get_option_int(options, "hpd_delay", 500); edid = video_get_option_int(options, "edid", 1); #endif + overscan_x = video_get_option_int(options, "overscan_x", -1); + overscan_y = video_get_option_int(options, "overscan_y", -1); sunxi_display.monitor = sunxi_get_default_mon(true); video_get_option_string(options, "monitor", mon, sizeof(mon), sunxi_get_mon_desc(sunxi_display.monitor)); @@ -1386,8 +1391,20 @@ void *video_hw_init(void) break; }
+ /* Yes these defaults are quite high, overscan on composite sucks... */ + if (overscan_x == -1) + overscan_x = sunxi_is_composite() ? 32 : 0; + if (overscan_y == -1) + overscan_y = sunxi_is_composite() ? 20 : 0; + sunxi_display.fb_size = (mode->xres * mode->yres * 4 + 0xfff) & ~0xfff; + overscan_offset = (overscan_y * mode->xres + overscan_x) * 4; + /* We want to keep the fb_base for simplefb page aligned, where as + * the sunxi dma engines will happily accept an unaligned address. */ + if (overscan_offset) + sunxi_display.fb_size += 0x1000; + 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, @@ -1395,25 +1412,37 @@ void *video_hw_init(void) return NULL; }
- printf("Setting up a %dx%d%s %s console\n", mode->xres, mode->yres, + printf("Setting up a %dx%d%s %s console (overscan %dx%d)\n", + mode->xres, mode->yres, (mode->vmode == FB_VMODE_INTERLACED) ? "i" : "", - sunxi_get_mon_desc(sunxi_display.monitor)); + sunxi_get_mon_desc(sunxi_display.monitor), + overscan_x, overscan_y);
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); + + fb_dma_addr = gd->fb_base - CONFIG_SYS_SDRAM_BASE; + sunxi_display.fb_addr = gd->fb_base; + if (overscan_offset) { + fb_dma_addr += 0x1000 - (overscan_offset & 0xfff); + sunxi_display.fb_addr += (overscan_offset + 0xfff) & ~0xfff; + memset((void *)gd->fb_base, 0, sunxi_display.fb_size); + flush_cache(gd->fb_base, sunxi_display.fb_size); + } + sunxi_mode_set(mode, fb_dma_addr);
/* * These are the only members of this structure that are used. All the * others are driver specific. There is nothing to decribe pitch or * stride, but we are lucky with our hw. */ - graphic_device->frameAdrs = gd->fb_base; + graphic_device->frameAdrs = sunxi_display.fb_addr; graphic_device->gdfIndex = GDF_32BIT_X888RGB; graphic_device->gdfBytesPP = 4; - graphic_device->winSizeX = mode->xres; - graphic_device->winSizeY = mode->yres; + graphic_device->winSizeX = mode->xres - 2 * overscan_x; + graphic_device->winSizeY = mode->yres - 2 * overscan_y; + graphic_device->plnSizeX = mode->xres * graphic_device->gdfBytesPP;
return graphic_device; } @@ -1490,10 +1519,9 @@ int sunxi_simplefb_setup(void *blob) return ret; }
- ret = fdt_setup_simplefb_node(blob, offset, gd->fb_base, + ret = fdt_setup_simplefb_node(blob, offset, sunxi_display.fb_addr, graphic_device->winSizeX, graphic_device->winSizeY, - graphic_device->winSizeX * graphic_device->gdfBytesPP, - "x8r8g8b8"); + graphic_device->plnSizeX, "x8r8g8b8"); if (ret) eprintf("Cannot setup simplefb: Error setting properties\n");
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h index a2cbcf5..83b6556 100644 --- a/include/configs/sunxi-common.h +++ b/include/configs/sunxi-common.h @@ -302,6 +302,7 @@ extern int soft_i2c_gpio_scl; #define CONFIG_VIDEO_LOGO #define CONFIG_VIDEO_STD_TIMINGS #define CONFIG_I2C_EDID +#define VIDEO_LINE_LEN (pGD->plnSizeX)
/* allow both serial and cfb console. */ #define CONFIG_CONSOLE_MUX