| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <device/mmio.h> |
| #include <boot/tables.h> |
| #include <console/console.h> |
| #include <delay.h> |
| #include <device/device.h> |
| #include <edid.h> |
| #include <soc/addressmap.h> |
| #include <soc/clock.h> |
| #include <soc/display.h> |
| #include <soc/sdram.h> |
| #include <soc/nvidia/tegra/dc.h> |
| #include <soc/nvidia/tegra/pwm.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| #include "chip.h" |
| |
| struct tegra_dc dc_data; |
| |
| int dump = 0; |
| unsigned long READL(void *p) |
| { |
| unsigned long value; |
| |
| /* |
| * In case of hard hung on readl(p), we can set dump > 1 to print out |
| * the address accessed. |
| */ |
| if (dump > 1) |
| printk(BIOS_SPEW, "readl %p\n", p); |
| |
| value = read32(p); |
| if (dump) |
| printk(BIOS_SPEW, "readl %p %08lx\n", p, value); |
| return value; |
| } |
| |
| void WRITEL(unsigned long value, void *p) |
| { |
| if (dump) |
| printk(BIOS_SPEW, "writel %p %08lx\n", p, value); |
| write32(p, value); |
| } |
| |
| /* return in 1000ths of a Hertz */ |
| static int tegra_dc_calc_refresh(const struct soc_nvidia_tegra124_config *config) |
| { |
| int h_total, v_total, refresh; |
| int pclk = config->pixel_clock; |
| |
| h_total = config->xres + config->hfront_porch + config->hback_porch + |
| config->hsync_width; |
| v_total = config->yres + config->vfront_porch + config->vback_porch + |
| config->vsync_width; |
| if (!pclk || !h_total || !v_total) |
| return 0; |
| refresh = pclk / h_total; |
| refresh *= 1000; |
| refresh /= v_total; |
| return refresh; |
| } |
| |
| static void print_mode(const struct soc_nvidia_tegra124_config *config) |
| { |
| if (config) { |
| int refresh = tegra_dc_calc_refresh(config); |
| printk(BIOS_ERR, |
| "MODE:%dx%d@%d.%03uHz pclk=%d\n", |
| config->xres, config->yres, |
| refresh / 1000, refresh % 1000, |
| config->pixel_clock); |
| } |
| } |
| |
| static int update_display_mode(struct display_controller *disp_ctrl, |
| struct soc_nvidia_tegra124_config *config) |
| { |
| print_mode(config); |
| |
| WRITEL(0x1, &disp_ctrl->disp.disp_timing_opt); |
| |
| WRITEL(config->vref_to_sync << 16 | config->href_to_sync, |
| &disp_ctrl->disp.ref_to_sync); |
| |
| WRITEL(config->vsync_width << 16 | config->hsync_width, |
| &disp_ctrl->disp.sync_width); |
| |
| WRITEL(((config->vback_porch - config->vref_to_sync) << 16) | config->hback_porch, |
| &disp_ctrl->disp.back_porch); |
| |
| WRITEL(((config->vfront_porch + config->vref_to_sync) << 16) | config->hfront_porch, |
| &disp_ctrl->disp.front_porch); |
| |
| WRITEL(config->xres | (config->yres << 16), |
| &disp_ctrl->disp.disp_active); |
| |
| /** |
| * We want to use PLLD_out0, which is PLLD / 2: |
| * PixelClock = (PLLD / 2) / ShiftClockDiv / PixelClockDiv. |
| * |
| * Currently most panels work inside clock range 50MHz~100MHz, and PLLD |
| * has some requirements to have VCO in range 500MHz~1000MHz (see |
| * clock.c for more detail). To simplify calculation, we set |
| * PixelClockDiv to 1 and ShiftClockDiv to 1. In future these values |
| * may be calculated by clock_display, to allow wider frequency range. |
| * |
| * Note ShiftClockDiv is a 7.1 format value. |
| */ |
| const u32 shift_clock_div = 1; |
| WRITEL((PIXEL_CLK_DIVIDER_PCD1 << PIXEL_CLK_DIVIDER_SHIFT) | |
| ((shift_clock_div - 1) * 2) << SHIFT_CLK_DIVIDER_SHIFT, |
| &disp_ctrl->disp.disp_clk_ctrl); |
| printk(BIOS_DEBUG, "%s: PixelClock=%u, ShiftClockDiv=%u\n", |
| __func__, config->pixel_clock, shift_clock_div); |
| return 0; |
| } |
| |
| static void update_window(struct display_controller *disp_ctrl, |
| struct soc_nvidia_tegra124_config *config) |
| { |
| u32 val; |
| |
| WRITEL(WINDOW_A_SELECT, &disp_ctrl->cmd.disp_win_header); |
| |
| WRITEL(((config->yres << 16) | config->xres), &disp_ctrl->win.size); |
| WRITEL(((config->yres << 16) | |
| (config->xres * config->framebuffer_bits_per_pixel / 8)), |
| &disp_ctrl->win.prescaled_size); |
| WRITEL(((config->xres * config->framebuffer_bits_per_pixel / 8 + 31) / |
| 32 * 32), &disp_ctrl->win.line_stride); |
| |
| WRITEL(config->color_depth, &disp_ctrl->win.color_depth); |
| |
| WRITEL(config->framebuffer_base, &disp_ctrl->winbuf.start_addr); |
| WRITEL((V_DDA_INC(0x1000) | H_DDA_INC(0x1000)), &disp_ctrl->win.dda_increment); |
| |
| WRITEL(COLOR_WHITE, &disp_ctrl->disp.blend_background_color); |
| WRITEL(DISP_CTRL_MODE_C_DISPLAY, &disp_ctrl->cmd.disp_cmd); |
| |
| WRITEL(WRITE_MUX_ACTIVE, &disp_ctrl->cmd.state_access); |
| |
| val = GENERAL_ACT_REQ | WIN_A_ACT_REQ; |
| val |= GENERAL_UPDATE | WIN_A_UPDATE; |
| WRITEL(val, &disp_ctrl->cmd.state_ctrl); |
| |
| // Enable win_a |
| val = READL(&disp_ctrl->win.win_opt); |
| WRITEL(val | WIN_ENABLE, &disp_ctrl->win.win_opt); |
| } |
| |
| static int tegra_dc_init(struct display_controller *disp_ctrl) |
| { |
| /* do not accept interrupts during initialization */ |
| WRITEL(0x00000000, &disp_ctrl->cmd.int_mask); |
| WRITEL(WRITE_MUX_ASSEMBLY | READ_MUX_ASSEMBLY, |
| &disp_ctrl->cmd.state_access); |
| WRITEL(WINDOW_A_SELECT, &disp_ctrl->cmd.disp_win_header); |
| WRITEL(0x00000000, &disp_ctrl->win.win_opt); |
| WRITEL(0x00000000, &disp_ctrl->win.byte_swap); |
| WRITEL(0x00000000, &disp_ctrl->win.buffer_ctrl); |
| |
| WRITEL(0x00000000, &disp_ctrl->win.pos); |
| WRITEL(0x00000000, &disp_ctrl->win.h_initial_dda); |
| WRITEL(0x00000000, &disp_ctrl->win.v_initial_dda); |
| WRITEL(0x00000000, &disp_ctrl->win.dda_increment); |
| WRITEL(0x00000000, &disp_ctrl->win.dv_ctrl); |
| |
| WRITEL(0x01000000, &disp_ctrl->win.blend_layer_ctrl); |
| WRITEL(0x00000000, &disp_ctrl->win.blend_match_select); |
| WRITEL(0x00000000, &disp_ctrl->win.blend_nomatch_select); |
| WRITEL(0x00000000, &disp_ctrl->win.blend_alpha_1bit); |
| |
| WRITEL(0x00000000, &disp_ctrl->winbuf.start_addr_hi); |
| WRITEL(0x00000000, &disp_ctrl->winbuf.addr_h_offset); |
| WRITEL(0x00000000, &disp_ctrl->winbuf.addr_v_offset); |
| |
| WRITEL(0x00000000, &disp_ctrl->com.crc_checksum); |
| WRITEL(0x00000000, &disp_ctrl->com.pin_output_enb[0]); |
| WRITEL(0x00000000, &disp_ctrl->com.pin_output_enb[1]); |
| WRITEL(0x00000000, &disp_ctrl->com.pin_output_enb[2]); |
| WRITEL(0x00000000, &disp_ctrl->com.pin_output_enb[3]); |
| WRITEL(0x00000000, &disp_ctrl->disp.disp_signal_opt0); |
| |
| return 0; |
| } |
| |
| uint32_t fb_base_mb(void) |
| { |
| return sdram_max_addressable_mb() - FB_SIZE_MB; |
| } |
| |
| /* this is really aimed at the lcd panel. That said, there are two display |
| * devices on this part and we may someday want to extend it for other boards. |
| */ |
| void display_startup(struct device *dev) |
| { |
| struct soc_nvidia_tegra124_config *config = dev->chip_info; |
| struct display_controller *disp_ctrl = (void *)config->display_controller; |
| struct pwm_controller *pwm = (void *)TEGRA_PWM_BASE; |
| struct tegra_dc *dc = &dc_data; |
| u32 plld_rate; |
| |
| /* init dc */ |
| dc->base = (void *)TEGRA_ARM_DISPLAYA; |
| dc->config = config; |
| config->dc_data = dc; |
| |
| /* Note dp_init may read EDID and change some config values. */ |
| dp_init(config); |
| |
| /* should probably just make it all MiB ... in future */ |
| u32 framebuffer_size_mb = config->framebuffer_size / MiB; |
| u32 framebuffer_base_mb= config->framebuffer_base / MiB; |
| |
| /* light it all up */ |
| /* This one may have been done in romstage but that's ok for now. */ |
| if (config->panel_vdd_gpio){ |
| gpio_output(config->panel_vdd_gpio, 1); |
| printk(BIOS_SPEW,"%s: panel_vdd setting gpio %08x to %d\n", |
| __func__, config->panel_vdd_gpio, 1); |
| } |
| udelay(config->vdd_delay_ms * 1000); |
| if (config->backlight_vdd_gpio){ |
| gpio_output(config->backlight_vdd_gpio, 1); |
| printk(BIOS_SPEW,"%s: backlight vdd setting gpio %08x to %d\n", |
| __func__, config->backlight_vdd_gpio, 1); |
| } |
| if (config->lvds_shutdown_gpio){ |
| gpio_output(config->lvds_shutdown_gpio, 0); |
| printk(BIOS_SPEW,"%s: lvds shutdown setting gpio %08x to %d\n", |
| __func__, config->lvds_shutdown_gpio, 0); |
| } |
| |
| if (framebuffer_size_mb == 0){ |
| framebuffer_size_mb = ALIGN_UP(config->xres * config->yres * |
| (config->framebuffer_bits_per_pixel / 8), MiB)/MiB; |
| } |
| |
| if (! framebuffer_base_mb) |
| framebuffer_base_mb = fb_base_mb(); |
| |
| config->framebuffer_size = framebuffer_size_mb * MiB; |
| config->framebuffer_base = framebuffer_base_mb * MiB; |
| |
| mmu_config_range(framebuffer_base_mb, framebuffer_size_mb, |
| DCACHE_WRITETHROUGH); |
| |
| printk(BIOS_SPEW, "LCD frame buffer at %dMiB to %dMiB\n", framebuffer_base_mb, |
| framebuffer_base_mb + framebuffer_size_mb); |
| |
| /* GPIO magic here if needed to start powering up things. You |
| * really only want to enable vdd, wait a bit, and then enable |
| * the panel. However ... the timings in the tegra20 dts make |
| * no sense to me. I'm pretty sure they're wrong. |
| * The panel_vdd is done in the romstage, so we need only |
| * light things up here once we're sure it's all working. |
| */ |
| |
| /* The plld is programmed with the assumption of the SHIFT_CLK_DIVIDER |
| * and PIXEL_CLK_DIVIDER are zero (divide by 1). See the |
| * update_display_mode() for detail. |
| */ |
| plld_rate = clock_display(config->pixel_clock * 2); |
| if (plld_rate == 0) { |
| printk(BIOS_ERR, "dc: clock init failed\n"); |
| return; |
| } else if (plld_rate != config->pixel_clock * 2) { |
| printk(BIOS_WARNING, "dc: plld rounded to %u\n", plld_rate); |
| config->pixel_clock = plld_rate / 2; |
| } |
| |
| /* Init dc */ |
| if (tegra_dc_init(disp_ctrl)) { |
| printk(BIOS_ERR, "dc: init failed\n"); |
| return; |
| } |
| |
| /* Configure dc mode */ |
| if (update_display_mode(disp_ctrl, config)) { |
| printk(BIOS_ERR, "dc: failed to configure display mode.\n"); |
| return; |
| } |
| |
| /* Enable dp */ |
| dp_enable(dc->out); |
| |
| /* Init frame buffer */ |
| memset((void *)(framebuffer_base_mb*MiB), 0x00, |
| framebuffer_size_mb*MiB); |
| |
| update_window(disp_ctrl, config); |
| |
| /* Set up Tegra PWM n (where n is specified in config->pwm) to drive the |
| * panel backlight. |
| */ |
| printk(BIOS_SPEW, "%s: enable panel backlight pwm\n", __func__); |
| WRITEL(((1 << NV_PWM_CSR_ENABLE_SHIFT) | |
| (220 << NV_PWM_CSR_PULSE_WIDTH_SHIFT) | /* 220/256 */ |
| 0x02e), /* frequency divider */ |
| &pwm->pwm[config->pwm].csr); |
| |
| udelay(config->pwm_to_bl_delay_ms * 1000); |
| if (config->backlight_en_gpio){ |
| gpio_output(config->backlight_en_gpio, 1); |
| printk(BIOS_SPEW,"%s: backlight enable setting gpio %08x to %d\n", |
| __func__, config->backlight_en_gpio, 1); |
| } |
| |
| printk(BIOS_INFO, "%s: display init done.\n", __func__); |
| |
| /* tell depthcharge ... |
| */ |
| struct edid edid; |
| edid.mode.va = config->yres; |
| edid.mode.ha = config->xres; |
| edid_set_framebuffer_bits_per_pixel(&edid, |
| config->framebuffer_bits_per_pixel, 32); |
| set_vbe_mode_info_valid(&edid, (uintptr_t)(framebuffer_base_mb*MiB)); |
| } |