diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/tegra.c | 72 |
1 files changed, 53 insertions, 19 deletions
diff --git a/drivers/video/tegra.c b/drivers/video/tegra.c index fc70beb..8fc9c06 100644 --- a/drivers/video/tegra.c +++ b/drivers/video/tegra.c @@ -34,10 +34,44 @@ enum stage_t { static enum stage_t stage; /* Current stage we are at */ static unsigned long timer_next; /* Time we can move onto next stage */ +/* Information about the display controller */ +struct tegra_lcd_priv { + int valid; /* config is valid */ + 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 + * case this field holds 24 also! This is a U-Boot thing. + */ + int log2_bpp; + struct disp_ctlr *disp; /* Display controller to use */ + fdt_addr_t frame_buffer; /* Address of frame buffer */ + 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; + + struct gpio_desc backlight_en; /* GPIO for backlight enable */ + struct gpio_desc lvds_shutdown; /* GPIO for lvds shutdown */ + struct gpio_desc backlight_vdd; /* GPIO for backlight vdd */ + struct gpio_desc panel_vdd; /* GPIO for panel vdd */ + /* + * Panel required timings + * Timing 1: delay between panel_vdd-rise and data-rise + * Timing 2: delay between data-rise and backlight_vdd-rise + * Timing 3: delay between backlight_vdd and pwm-rise + * Timing 4: delay between pwm-rise and backlight_en-rise + */ + uint panel_timings[FDT_LCD_TIMINGS]; +}; + /* Our LCD config, set up in handle_stage() */ -static struct fdt_panel_config config; -struct fdt_disp_config *disp_config; /* Display controller config */ -static struct fdt_disp_config dconfig; +static struct tegra_lcd_priv config; +struct tegra_lcd_priv *disp_config; /* Display controller config */ enum { /* Maximum LCD size we support */ @@ -107,14 +141,14 @@ static void update_window(struct dc_ctlr *dc, struct disp_ctl_win *win) writel(val, &dc->cmd.state_ctrl); } -static void write_pair(struct fdt_disp_config *config, int item, u32 *reg) +static void write_pair(struct tegra_lcd_priv *config, int item, u32 *reg) { writel(config->horiz_timing[item] | (config->vert_timing[item] << 16), reg); } static int update_display_mode(struct dc_disp_reg *disp, - struct fdt_disp_config *config) + struct tegra_lcd_priv *config) { unsigned long val; unsigned long rate; @@ -230,7 +264,7 @@ static void rgb_enable(struct dc_com_reg *com) } static int setup_window(struct disp_ctl_win *win, - struct fdt_disp_config *config) + struct tegra_lcd_priv *config) { win->x = 0; win->y = 0; @@ -268,9 +302,9 @@ static int setup_window(struct disp_ctl_win *win, * @return pointer to display configuration, or NULL if there is no valid * config */ -struct fdt_disp_config *tegra_display_get_config(void) +struct tegra_lcd_priv *tegra_display_get_config(void) { - return dconfig.valid ? &dconfig : NULL; + return config.valid ? &config : NULL; } static void debug_timing(const char *name, unsigned int timing[]) @@ -294,7 +328,7 @@ static void debug_timing(const char *name, unsigned int timing[]) * @return 0 if ok, -ve on error */ static int tegra_decode_panel(const void *blob, int node, - struct fdt_disp_config *config) + struct tegra_lcd_priv *config) { int front, back, ref; @@ -349,7 +383,7 @@ static int tegra_decode_panel(const void *blob, int node, * @return 0 if ok, -ve on error */ static int tegra_display_decode_config(const void *blob, - struct fdt_disp_config *config) + struct tegra_lcd_priv *config) { int node, rgb; int bpp, bit; @@ -403,7 +437,7 @@ static int tegra_display_decode_config(const void *blob, * * The frame buffer can be positioned by U-Boot or overriden by the fdt. * You should pass in the U-Boot address here, and check the contents of - * struct fdt_disp_config to see what was actually chosen. + * struct tegra_lcd_priv to see what was actually chosen. * * @param blob Device tree blob * @param default_lcd_base Default address of LCD frame buffer @@ -414,12 +448,12 @@ static int tegra_display_probe(const void *blob, void *default_lcd_base) struct disp_ctl_win window; struct dc_ctlr *dc; - if (tegra_display_decode_config(blob, &dconfig)) + if (tegra_display_decode_config(blob, &config)) return -1; - dconfig.frame_buffer = (u32)default_lcd_base; + config.frame_buffer = (u32)default_lcd_base; - dc = (struct dc_ctlr *)dconfig.disp; + dc = (struct dc_ctlr *)config.disp; /* * A header file for clock constants was NAKed upstream. @@ -434,10 +468,10 @@ static int tegra_display_probe(const void *blob, void *default_lcd_base) basic_init_timer(&dc->disp); rgb_enable(&dc->com); - if (dconfig.pixel_clock) - update_display_mode(&dc->disp, &dconfig); + if (config.pixel_clock) + update_display_mode(&dc->disp, &config); - if (setup_window(&window, &dconfig)) + if (setup_window(&window, &config)) return -1; update_window(dc, &window); @@ -445,7 +479,7 @@ static int tegra_display_probe(const void *blob, void *default_lcd_base) return 0; } -static void update_panel_size(struct fdt_disp_config *config) +static void update_panel_size(struct tegra_lcd_priv *config) { panel_info.vl_col = config->width; panel_info.vl_row = config->height; @@ -515,7 +549,7 @@ void tegra_lcd_early_init(const void *blob) * @param config structure to store fdt config into * @return 0 if ok, -ve on error */ -static int fdt_decode_lcd(const void *blob, struct fdt_panel_config *config) +static int fdt_decode_lcd(const void *blob, struct tegra_lcd_priv *config) { int display_node; |