diff options
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/tegra.c | 264 |
1 files changed, 105 insertions, 159 deletions
diff --git a/drivers/video/tegra.c b/drivers/video/tegra.c index ae9edfd..ccd9c08 100644 --- a/drivers/video/tegra.c +++ b/drivers/video/tegra.c @@ -57,7 +57,6 @@ struct tegra_lcd_priv { unsigned long timer_next; /* Time we can move onto next stage */ int width; /* width in pixels */ int height; /* height in pixels */ - int bpp; /* number of bits per pixel */ /* * log2 of number of bpp, in general, unless it bpp is 24 in which @@ -69,7 +68,6 @@ struct tegra_lcd_priv { unsigned pixel_clock; /* Pixel clock in Hz */ uint horiz_timing[FDT_LCD_TIMING_COUNT]; /* Horizontal timing */ uint vert_timing[FDT_LCD_TIMING_COUNT]; /* Vertical timing */ - int panel_node; /* node offset of panel information */ int pwm_channel; /* PWM channel to use for backlight */ enum lcd_cache_t cache_type; @@ -318,109 +316,6 @@ static void debug_timing(const char *name, unsigned int timing[]) } /** - * Decode panel information from the fdt, according to a standard binding - * - * @param blob fdt blob - * @param node offset of fdt node to read from - * @param priv structure to store fdt config into - * @return 0 if ok, -ve on error - */ -static int tegra_decode_panel(const void *blob, int node, - struct tegra_lcd_priv *priv) -{ - int front, back, ref; - - priv->width = fdtdec_get_int(blob, node, "xres", -1); - priv->height = fdtdec_get_int(blob, node, "yres", -1); - priv->pixel_clock = fdtdec_get_int(blob, node, "clock", 0); - if (!priv->pixel_clock || priv->width == -1 || priv->height == -1) { - debug("%s: Pixel parameters missing\n", __func__); - return -FDT_ERR_NOTFOUND; - } - - back = fdtdec_get_int(blob, node, "left-margin", -1); - front = fdtdec_get_int(blob, node, "right-margin", -1); - ref = fdtdec_get_int(blob, node, "hsync-len", -1); - if ((back | front | ref) == -1) { - debug("%s: Horizontal parameters missing\n", __func__); - return -FDT_ERR_NOTFOUND; - } - - /* Use a ref-to-sync of 1 always, and take this from the front porch */ - priv->horiz_timing[FDT_LCD_TIMING_REF_TO_SYNC] = 1; - priv->horiz_timing[FDT_LCD_TIMING_SYNC_WIDTH] = ref; - priv->horiz_timing[FDT_LCD_TIMING_BACK_PORCH] = back; - priv->horiz_timing[FDT_LCD_TIMING_FRONT_PORCH] = front - - priv->horiz_timing[FDT_LCD_TIMING_REF_TO_SYNC]; - debug_timing("horiz", priv->horiz_timing); - - back = fdtdec_get_int(blob, node, "upper-margin", -1); - front = fdtdec_get_int(blob, node, "lower-margin", -1); - ref = fdtdec_get_int(blob, node, "vsync-len", -1); - if ((back | front | ref) == -1) { - debug("%s: Vertical parameters missing\n", __func__); - return -FDT_ERR_NOTFOUND; - } - - priv->vert_timing[FDT_LCD_TIMING_REF_TO_SYNC] = 1; - priv->vert_timing[FDT_LCD_TIMING_SYNC_WIDTH] = ref; - priv->vert_timing[FDT_LCD_TIMING_BACK_PORCH] = back; - priv->vert_timing[FDT_LCD_TIMING_FRONT_PORCH] = front - - priv->vert_timing[FDT_LCD_TIMING_REF_TO_SYNC]; - debug_timing("vert", priv->vert_timing); - - return 0; -} - -/** - * Decode the display controller information from the fdt. - * - * @param blob fdt blob - * @param priv structure to store fdt priv into - * @return 0 if ok, -ve on error - */ -static int tegra_display_decode_config(const void *blob, int node, - struct tegra_lcd_priv *priv) -{ - int rgb; - int bpp, bit; - - priv->disp = (struct disp_ctlr *)fdtdec_get_addr(blob, node, "reg"); - if (!priv->disp) { - debug("%s: No display controller address\n", __func__); - return -1; - } - - rgb = fdt_subnode_offset(blob, node, "rgb"); - - priv->panel_node = fdtdec_lookup_phandle(blob, rgb, "nvidia,panel"); - if (priv->panel_node < 0) { - debug("%s: Cannot find panel information\n", __func__); - return -1; - } - - if (tegra_decode_panel(blob, priv->panel_node, priv)) { - debug("%s: Failed to decode panel information\n", __func__); - return -1; - } - - bpp = fdtdec_get_int(blob, priv->panel_node, "nvidia,bits-per-pixel", - -1); - bit = ffs(bpp) - 1; - if (bpp == (1 << bit)) - priv->log2_bpp = bit; - else - priv->log2_bpp = bpp; - if (bpp == -1) { - debug("%s: Pixel bpp parameters missing\n", __func__); - return -FDT_ERR_NOTFOUND; - } - priv->bpp = bpp; - - return 0; -} - -/** * Register a new display based on device tree configuration. * * The frame buffer can be positioned by U-Boot or overriden by the fdt. @@ -467,51 +362,6 @@ static int tegra_display_probe(const void *blob, struct tegra_lcd_priv *priv, } /** - * Decode the panel information from the fdt. - * - * @param blob fdt blob - * @param priv structure to store fdt config into - * @return 0 if ok, -ve on error - */ -static int fdt_decode_lcd(const void *blob, struct tegra_lcd_priv *priv) -{ - int display_node; - - display_node = priv->panel_node; - if (display_node < 0) { - debug("%s: No panel configuration available\n", __func__); - return -1; - } - - priv->pwm_channel = pwm_request(blob, display_node, "nvidia,pwm"); - if (priv->pwm_channel < 0) { - debug("%s: Unable to request PWM channel\n", __func__); - return -1; - } - - priv->cache_type = fdtdec_get_int(blob, display_node, - "nvidia,cache-type", - FDT_LCD_CACHE_WRITE_BACK_FLUSH); - - /* These GPIOs are all optional */ - gpio_request_by_name_nodev(blob, display_node, - "nvidia,backlight-enable-gpios", 0, - &priv->backlight_en, GPIOD_IS_OUT); - gpio_request_by_name_nodev(blob, display_node, - "nvidia,lvds-shutdown-gpios", 0, - &priv->lvds_shutdown, GPIOD_IS_OUT); - gpio_request_by_name_nodev(blob, display_node, - "nvidia,backlight-vdd-gpios", 0, - &priv->backlight_vdd, GPIOD_IS_OUT); - gpio_request_by_name_nodev(blob, display_node, - "nvidia,panel-vdd-gpios", 0, - &priv->panel_vdd, GPIOD_IS_OUT); - - return fdtdec_get_int_array(blob, display_node, "nvidia,panel-timings", - priv->panel_timings, FDT_LCD_TIMINGS); -} - -/** * Handle the next stage of device init */ static int handle_stage(const void *blob, struct tegra_lcd_priv *priv) @@ -624,15 +474,6 @@ static int tegra_lcd_probe(struct udevice *dev) const void *blob = gd->fdt_blob; int type = DCACHE_OFF; - if (tegra_display_decode_config(blob, dev->of_offset, priv)) - return -1; - - /* get panel details */ - if (fdt_decode_lcd(blob, priv)) { - printf("No valid LCD information in device tree\n"); - return -1; - } - /* Initialize the Tegra display controller */ if (tegra_display_probe(blob, priv, (void *)plat->base)) { printf("%s: Failed to probe display driver\n", __func__); @@ -660,6 +501,110 @@ static int tegra_lcd_probe(struct udevice *dev) return 0; } +static int tegra_lcd_ofdata_to_platdata(struct udevice *dev) +{ + struct tegra_lcd_priv *priv = dev_get_priv(dev); + const void *blob = gd->fdt_blob; + int node = dev->of_offset; + int front, back, ref; + int panel_node; + int rgb; + int bpp, bit; + + priv->disp = (struct disp_ctlr *)dev_get_addr(dev); + if (!priv->disp) { + debug("%s: No display controller address\n", __func__); + return -EINVAL; + } + + rgb = fdt_subnode_offset(blob, node, "rgb"); + + panel_node = fdtdec_lookup_phandle(blob, rgb, "nvidia,panel"); + if (panel_node < 0) { + debug("%s: Cannot find panel information\n", __func__); + return -EINVAL; + } + + priv->width = fdtdec_get_int(blob, panel_node, "xres", -1); + priv->height = fdtdec_get_int(blob, panel_node, "yres", -1); + priv->pixel_clock = fdtdec_get_int(blob, panel_node, "clock", 0); + if (!priv->pixel_clock || priv->width == -1 || priv->height == -1) { + debug("%s: Pixel parameters missing\n", __func__); + return -EINVAL; + } + + back = fdtdec_get_int(blob, panel_node, "left-margin", -1); + front = fdtdec_get_int(blob, panel_node, "right-margin", -1); + ref = fdtdec_get_int(blob, panel_node, "hsync-len", -1); + if ((back | front | ref) == -1) { + debug("%s: Horizontal parameters missing\n", __func__); + return -EINVAL; + } + + /* Use a ref-to-sync of 1 always, and take this from the front porch */ + priv->horiz_timing[FDT_LCD_TIMING_REF_TO_SYNC] = 1; + priv->horiz_timing[FDT_LCD_TIMING_SYNC_WIDTH] = ref; + priv->horiz_timing[FDT_LCD_TIMING_BACK_PORCH] = back; + priv->horiz_timing[FDT_LCD_TIMING_FRONT_PORCH] = front - + priv->horiz_timing[FDT_LCD_TIMING_REF_TO_SYNC]; + debug_timing("horiz", priv->horiz_timing); + + back = fdtdec_get_int(blob, panel_node, "upper-margin", -1); + front = fdtdec_get_int(blob, panel_node, "lower-margin", -1); + ref = fdtdec_get_int(blob, panel_node, "vsync-len", -1); + if ((back | front | ref) == -1) { + debug("%s: Vertical parameters missing\n", __func__); + return -EINVAL; + } + + priv->vert_timing[FDT_LCD_TIMING_REF_TO_SYNC] = 1; + priv->vert_timing[FDT_LCD_TIMING_SYNC_WIDTH] = ref; + priv->vert_timing[FDT_LCD_TIMING_BACK_PORCH] = back; + priv->vert_timing[FDT_LCD_TIMING_FRONT_PORCH] = front - + priv->vert_timing[FDT_LCD_TIMING_REF_TO_SYNC]; + debug_timing("vert", priv->vert_timing); + + bpp = fdtdec_get_int(blob, panel_node, "nvidia,bits-per-pixel", -1); + bit = ffs(bpp) - 1; + if (bpp == (1 << bit)) + priv->log2_bpp = bit; + else + priv->log2_bpp = bpp; + if (bpp == -1) { + debug("%s: Pixel bpp parameters missing\n", __func__); + return -EINVAL; + } + + priv->pwm_channel = pwm_request(blob, panel_node, "nvidia,pwm"); + if (priv->pwm_channel < 0) { + debug("%s: Unable to request PWM channel\n", __func__); + return -EINVAL; + } + + priv->cache_type = fdtdec_get_int(blob, panel_node, "nvidia,cache-type", + FDT_LCD_CACHE_WRITE_BACK_FLUSH); + + /* These GPIOs are all optional */ + gpio_request_by_name_nodev(blob, panel_node, + "nvidia,backlight-enable-gpios", 0, + &priv->backlight_en, GPIOD_IS_OUT); + gpio_request_by_name_nodev(blob, panel_node, + "nvidia,lvds-shutdown-gpios", 0, + &priv->lvds_shutdown, GPIOD_IS_OUT); + gpio_request_by_name_nodev(blob, panel_node, + "nvidia,backlight-vdd-gpios", 0, + &priv->backlight_vdd, GPIOD_IS_OUT); + gpio_request_by_name_nodev(blob, panel_node, + "nvidia,panel-vdd-gpios", 0, + &priv->panel_vdd, GPIOD_IS_OUT); + + if (fdtdec_get_int_array(blob, panel_node, "nvidia,panel-timings", + priv->panel_timings, FDT_LCD_TIMINGS)) + return -EINVAL; + + return 0; +} + static int tegra_lcd_bind(struct udevice *dev) { struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); @@ -685,5 +630,6 @@ U_BOOT_DRIVER(tegra_lcd) = { .ops = &tegra_lcd_ops, .bind = tegra_lcd_bind, .probe = tegra_lcd_probe, + .ofdata_to_platdata = tegra_lcd_ofdata_to_platdata, .priv_auto_alloc_size = sizeof(struct tegra_lcd_priv), }; |