From: Wei Ni wni@nvidia.com
Add support for the LCD peripheral at the Tegra2 SOC level. A separate LCD driver will use this functionality to configure the display.
Signed-off-by: Mayuresh Kulkarni mkulkarni@nvidia.com Mayuresh Kulkarni: - changes to remove bitfields and clean up for submission
Signed-off-by: Simon Glass sjg@chromium.org Simon Glass: - simplify code, move clock control into here, clean-up
--- Changes in v4: - Rebase on top of new tegra common directory structure - Adjust fdt binding according to Thierry and Stephen's comments - Remove LCD frame buffer address property hack
Changes in v3: - Separate display driver and LCD driver more in fdt - Add probe function to read in fdt parameters in display driver
arch/arm/cpu/armv7/tegra20/Makefile | 1 + arch/arm/cpu/armv7/tegra20/display.c | 409 ++++++++++++++++++++ arch/arm/include/asm/arch-tegra20/dc.h | 545 +++++++++++++++++++++++++++ arch/arm/include/asm/arch-tegra20/display.h | 152 ++++++++ include/fdtdec.h | 1 + lib/fdtdec.c | 1 + 6 files changed, 1109 insertions(+), 0 deletions(-) create mode 100644 arch/arm/cpu/armv7/tegra20/display.c create mode 100644 arch/arm/include/asm/arch-tegra20/dc.h create mode 100644 arch/arm/include/asm/arch-tegra20/display.h
diff --git a/arch/arm/cpu/armv7/tegra20/Makefile b/arch/arm/cpu/armv7/tegra20/Makefile index 77cb4d1..54ed8c4 100644 --- a/arch/arm/cpu/armv7/tegra20/Makefile +++ b/arch/arm/cpu/armv7/tegra20/Makefile @@ -29,6 +29,7 @@ LIB = $(obj)lib$(SOC).o
COBJS-$(CONFIG_USB_EHCI_TEGRA) += usb.o COBJS-$(CONFIG_PWM_TEGRA) += pwm.o +COBJS-$(CONFIG_VIDEO_TEGRA) += display.o
COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/arch/arm/cpu/armv7/tegra20/display.c b/arch/arm/cpu/armv7/tegra20/display.c new file mode 100644 index 0000000..031f9a8 --- /dev/null +++ b/arch/arm/cpu/armv7/tegra20/display.c @@ -0,0 +1,409 @@ +/* + * (C) Copyright 2010 + * NVIDIA Corporation <www.nvidia.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/tegra.h> +#include <asm/arch/display.h> +#include <asm/arch/dc.h> +#include <asm/arch-tegra/clk_rst.h> +#include <asm/arch-tegra/timer.h> + +static struct fdt_disp_config config; + +static void update_window(struct dc_ctlr *dc, struct disp_ctl_win *win) +{ + unsigned h_dda, v_dda; + unsigned long val; + + val = readl(&dc->cmd.disp_win_header); + val |= WINDOW_A_SELECT; + writel(val, &dc->cmd.disp_win_header); + + writel(win->fmt, &dc->win.color_depth); + + clrsetbits_le32(&dc->win.byte_swap, BYTE_SWAP_MASK, + BYTE_SWAP_NOSWAP << BYTE_SWAP_SHIFT); + + val = win->out_x << H_POSITION_SHIFT; + val |= win->out_y << V_POSITION_SHIFT; + writel(val, &dc->win.pos); + + val = win->out_w << H_SIZE_SHIFT; + val |= win->out_h << V_SIZE_SHIFT; + writel(val, &dc->win.size); + + val = (win->w * win->bpp / 8) << H_PRESCALED_SIZE_SHIFT; + val |= win->h << V_PRESCALED_SIZE_SHIFT; + writel(val, &dc->win.prescaled_size); + + writel(0, &dc->win.h_initial_dda); + writel(0, &dc->win.v_initial_dda); + + h_dda = (win->w * 0x1000) / max(win->out_w - 1, 1); + v_dda = (win->h * 0x1000) / max(win->out_h - 1, 1); + + val = h_dda << H_DDA_INC_SHIFT; + val |= v_dda << V_DDA_INC_SHIFT; + writel(val, &dc->win.dda_increment); + + writel(win->stride, &dc->win.line_stride); + writel(0, &dc->win.buf_stride); + + val = WIN_ENABLE; + if (win->bpp < 24) + val |= COLOR_EXPAND; + writel(val, &dc->win.win_opt); + + writel((unsigned long)win->phys_addr, &dc->winbuf.start_addr); + writel(win->x, &dc->winbuf.addr_h_offset); + writel(win->y, &dc->winbuf.addr_v_offset); + + writel(0xff00, &dc->win.blend_nokey); + writel(0xff00, &dc->win.blend_1win); + + val = GENERAL_ACT_REQ | WIN_A_ACT_REQ; + val |= GENERAL_UPDATE | WIN_A_UPDATE; + writel(val, &dc->cmd.state_ctrl); +} + +static void write_pair(struct fdt_disp_config *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) +{ + unsigned long val; + unsigned long rate; + unsigned long div; + + writel(0x0, &disp->disp_timing_opt); + write_pair(config, FDT_LCD_TIMING_REF_TO_SYNC, &disp->ref_to_sync); + write_pair(config, FDT_LCD_TIMING_SYNC_WIDTH, &disp->sync_width); + write_pair(config, FDT_LCD_TIMING_BACK_PORCH, &disp->back_porch); + write_pair(config, FDT_LCD_TIMING_FRONT_PORCH, &disp->front_porch); + + writel(config->width | (config->height << 16), &disp->disp_active); + + val = DE_SELECT_ACTIVE << DE_SELECT_SHIFT; + val |= DE_CONTROL_NORMAL << DE_CONTROL_SHIFT; + writel(val, &disp->data_enable_opt); + + val = DATA_FORMAT_DF1P1C << DATA_FORMAT_SHIFT; + val |= DATA_ALIGNMENT_MSB << DATA_ALIGNMENT_SHIFT; + val |= DATA_ORDER_RED_BLUE << DATA_ORDER_SHIFT; + writel(val, &disp->disp_interface_ctrl); + + /* + * The pixel clock divider is in 7.1 format (where the bottom bit + * represents 0.5). Here we calculate the divider needed to get from + * the display clock (typically 600MHz) to the pixel clock. We round + * up or down as requried. + */ + rate = clock_get_periph_rate(PERIPH_ID_DISP1, CLOCK_ID_CGENERAL); + div = ((rate * 2 + config->pixel_clock / 2) / config->pixel_clock) - 2; + debug("Display clock %lu, divider %lu\n", rate, div); + + writel(0x00010001, &disp->shift_clk_opt); + + val = PIXEL_CLK_DIVIDER_PCD1 << PIXEL_CLK_DIVIDER_SHIFT; + val |= div << SHIFT_CLK_DIVIDER_SHIFT; + writel(val, &disp->disp_clk_ctrl); + + return 0; +} + +/* Start up the display and turn on power to PWMs */ +static void basic_init(struct dc_cmd_reg *cmd) +{ + u32 val; + + writel(0x00000100, &cmd->gen_incr_syncpt_ctrl); + writel(0x0000011a, &cmd->cont_syncpt_vsync); + writel(0x00000000, &cmd->int_type); + writel(0x00000000, &cmd->int_polarity); + writel(0x00000000, &cmd->int_mask); + writel(0x00000000, &cmd->int_enb); + + val = PW0_ENABLE | PW1_ENABLE | PW2_ENABLE; + val |= PW3_ENABLE | PW4_ENABLE | PM0_ENABLE; + val |= PM1_ENABLE; + writel(val, &cmd->disp_pow_ctrl); + + val = readl(&cmd->disp_cmd); + val |= CTRL_MODE_C_DISPLAY << CTRL_MODE_SHIFT; + writel(val, &cmd->disp_cmd); +} + +static void basic_init_timer(struct dc_disp_reg *disp) +{ + writel(0x00000020, &disp->mem_high_pri); + writel(0x00000001, &disp->mem_high_pri_timer); +} + +static const u32 rgb_enb_tab[PIN_REG_COUNT] = { + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, +}; + +static const u32 rgb_polarity_tab[PIN_REG_COUNT] = { + 0x00000000, + 0x01000000, + 0x00000000, + 0x00000000, +}; + +static const u32 rgb_data_tab[PIN_REG_COUNT] = { + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, +}; + +static const u32 rgb_sel_tab[PIN_OUTPUT_SEL_COUNT] = { + 0x00000000, + 0x00000000, + 0x00000000, + 0x00000000, + 0x00210222, + 0x00002200, + 0x00020000, +}; + +static void rgb_enable(struct dc_com_reg *com) +{ + int i; + + for (i = 0; i < PIN_REG_COUNT; i++) { + writel(rgb_enb_tab[i], &com->pin_output_enb[i]); + writel(rgb_polarity_tab[i], &com->pin_output_polarity[i]); + writel(rgb_data_tab[i], &com->pin_output_data[i]); + } + + for (i = 0; i < PIN_OUTPUT_SEL_COUNT; i++) + writel(rgb_sel_tab[i], &com->pin_output_sel[i]); +} + +int setup_window(struct disp_ctl_win *win, struct fdt_disp_config *config) +{ + win->x = 0; + win->y = 0; + win->w = config->width; + win->h = config->height; + win->out_x = 0; + win->out_y = 0; + win->out_w = config->width; + win->out_h = config->height; + win->phys_addr = config->frame_buffer; + win->stride = config->width * (1 << config->log2_bpp) / 8; + debug("%s: depth = %d\n", __func__, config->log2_bpp); + switch (config->log2_bpp) { + case 5: + case 24: + win->fmt = COLOR_DEPTH_R8G8B8A8; + win->bpp = 32; + break; + case 4: + win->fmt = COLOR_DEPTH_B5G6R5; + win->bpp = 16; + break; + + default: + debug("Unsupported LCD bit depth"); + return -1; + } + + return 0; +} + +struct fdt_disp_config *tegra_display_get_config(void) +{ + return config.valid ? &config : NULL; +} + +static void debug_timing(const char *name, unsigned int timing[]) +{ +#ifdef DEBUG + int i; + + debug("%s timing: ", name); + for (i = 0; i < FDT_LCD_TIMING_COUNT; i++) + debug("%d ", timing[i]); + debug("\n"); +#endif +} + +/** + * 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 config structure to store fdt config into + * @return 0 if ok, -ve on error + */ +static int tegra_decode_panel(const void *blob, int node, + struct fdt_disp_config *config) +{ + int front, back, ref; + + config->width = fdtdec_get_int(blob, node, "xres", -1); + config->height = fdtdec_get_int(blob, node, "yres", -1); + config->pixel_clock = fdtdec_get_int(blob, node, "clock", 0); + if (!config->pixel_clock || config->width == -1 || + config->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 */ + config->horiz_timing[FDT_LCD_TIMING_REF_TO_SYNC] = 1; + config->horiz_timing[FDT_LCD_TIMING_SYNC_WIDTH] = ref; + config->horiz_timing[FDT_LCD_TIMING_BACK_PORCH] = back; + config->horiz_timing[FDT_LCD_TIMING_FRONT_PORCH] = front - + config->horiz_timing[FDT_LCD_TIMING_REF_TO_SYNC]; + debug_timing("horiz", config->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; + } + + config->vert_timing[FDT_LCD_TIMING_REF_TO_SYNC] = 1; + config->vert_timing[FDT_LCD_TIMING_SYNC_WIDTH] = ref; + config->vert_timing[FDT_LCD_TIMING_BACK_PORCH] = back; + config->vert_timing[FDT_LCD_TIMING_FRONT_PORCH] = front - + config->vert_timing[FDT_LCD_TIMING_REF_TO_SYNC]; + debug_timing("vert", config->vert_timing); + + return 0; +} + +/** + * Decode the display controller information from the fdt. + * + * @param blob fdt blob + * @param config structure to store fdt config into + * @return 0 if ok, -ve on error + */ +static int tegra_display_decode_config(const void *blob, + struct fdt_disp_config *config) +{ + int node, rgb; + int bpp, bit; + + /* TODO: Support multiple controllers */ + node = fdtdec_next_compatible(blob, 0, COMPAT_NVIDIA_TEGRA20_DC); + if (node < 0) { + debug("%s: Cannot find display controller node in fdt\n", + __func__); + return node; + } + config->disp = (struct disp_ctlr *)fdtdec_get_addr(blob, node, "reg"); + if (!config->disp) { + debug("%s: No display controller address\n", __func__); + return -1; + } + + rgb = fdt_subnode_offset(blob, node, "rgb"); + + config->panel_node = fdtdec_lookup_phandle(blob, rgb, "nvidia,panel"); + if (!config->panel_node < 0) { + debug("%s: Cannot find panel information\n", __func__); + return -1; + } + + if (tegra_decode_panel(blob, config->panel_node, config)) { + debug("%s: Failed to decode panel information\n", __func__); + return -1; + } + + bpp = fdtdec_get_int(blob, config->panel_node, "nvidia,bits-per-pixel", + -1); + bit = ffs(bpp) - 1; + if (bpp == (1 << bit)) + config->log2_bpp = bit; + else + config->log2_bpp = bpp; + if (bpp == -1) { + debug("%s: Pixel bpp parameters missing\n", __func__); + return -FDT_ERR_NOTFOUND; + } + config->bpp = bpp; + + config->valid = 1; /* we have a valid configuration */ + + return 0; +} + +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, &config)) + return -1; + + config.frame_buffer = (u32)default_lcd_base; + + dc = (struct dc_ctlr *)config.disp; + + /* + * A header file for clock constants was NAKed upstream. + * TODO: Put this into the FDT and fdt_lcd struct when we have clock + * support there + */ + clock_start_periph_pll(PERIPH_ID_HOST1X, CLOCK_ID_PERIPH, + 144 * 1000000); + clock_start_periph_pll(PERIPH_ID_DISP1, CLOCK_ID_CGENERAL, + 600 * 1000000); + basic_init(&dc->cmd); + basic_init_timer(&dc->disp); + rgb_enable(&dc->com); + + if (config.pixel_clock) + update_display_mode(&dc->disp, &config); + + if (setup_window(&window, &config)) + return -1; + + update_window(dc, &window); + + return 0; +} diff --git a/arch/arm/include/asm/arch-tegra20/dc.h b/arch/arm/include/asm/arch-tegra20/dc.h new file mode 100644 index 0000000..37934e1 --- /dev/null +++ b/arch/arm/include/asm/arch-tegra20/dc.h @@ -0,0 +1,545 @@ +/* + * (C) Copyright 2010 + * NVIDIA Corporation <www.nvidia.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __ASM_ARCH_TEGRA_DC_H +#define __ASM_ARCH_TEGRA_DC_H + +/* Register definitions for the Tegra display controller */ + +/* CMD register 0x000 ~ 0x43 */ +struct dc_cmd_reg { + /* Address 0x000 ~ 0x002 */ + uint gen_incr_syncpt; /* _CMD_GENERAL_INCR_SYNCPT_0 */ + uint gen_incr_syncpt_ctrl; /* _CMD_GENERAL_INCR_SYNCPT_CNTRL_0 */ + uint gen_incr_syncpt_err; /* _CMD_GENERAL_INCR_SYNCPT_ERROR_0 */ + + uint reserved0[5]; /* reserved_0[5] */ + + /* Address 0x008 ~ 0x00a */ + uint win_a_incr_syncpt; /* _CMD_WIN_A_INCR_SYNCPT_0 */ + uint win_a_incr_syncpt_ctrl; /* _CMD_WIN_A_INCR_SYNCPT_CNTRL_0 */ + uint win_a_incr_syncpt_err; /* _CMD_WIN_A_INCR_SYNCPT_ERROR_0 */ + + uint reserved1[5]; /* reserved_1[5] */ + + /* Address 0x010 ~ 0x012 */ + uint win_b_incr_syncpt; /* _CMD_WIN_B_INCR_SYNCPT_0 */ + uint win_b_incr_syncpt_ctrl; /* _CMD_WIN_B_INCR_SYNCPT_CNTRL_0 */ + uint win_b_incr_syncpt_err; /* _CMD_WIN_B_INCR_SYNCPT_ERROR_0 */ + + uint reserved2[5]; /* reserved_2[5] */ + + /* Address 0x018 ~ 0x01a */ + uint win_c_incr_syncpt; /* _CMD_WIN_C_INCR_SYNCPT_0 */ + uint win_c_incr_syncpt_ctrl; /* _CMD_WIN_C_INCR_SYNCPT_CNTRL_0 */ + uint win_c_incr_syncpt_err; /* _CMD_WIN_C_INCR_SYNCPT_ERROR_0 */ + + uint reserved3[13]; /* reserved_3[13] */ + + /* Address 0x028 */ + uint cont_syncpt_vsync; /* _CMD_CONT_SYNCPT_VSYNC_0 */ + + uint reserved4[7]; /* reserved_4[7] */ + + /* Address 0x030 ~ 0x033 */ + uint ctxsw; /* _CMD_CTXSW_0 */ + uint disp_cmd_opt0; /* _CMD_DISPLAY_COMMAND_OPTION0_0 */ + uint disp_cmd; /* _CMD_DISPLAY_COMMAND_0 */ + uint sig_raise; /* _CMD_SIGNAL_RAISE_0 */ + + uint reserved5[2]; /* reserved_0[2] */ + + /* Address 0x036 ~ 0x03e */ + uint disp_pow_ctrl; /* _CMD_DISPLAY_POWER_CONTROL_0 */ + uint int_stat; /* _CMD_INT_STATUS_0 */ + uint int_mask; /* _CMD_INT_MASK_0 */ + uint int_enb; /* _CMD_INT_ENABLE_0 */ + uint int_type; /* _CMD_INT_TYPE_0 */ + uint int_polarity; /* _CMD_INT_POLARITY_0 */ + uint sig_raise1; /* _CMD_SIGNAL_RAISE1_0 */ + uint sig_raise2; /* _CMD_SIGNAL_RAISE2_0 */ + uint sig_raise3; /* _CMD_SIGNAL_RAISE3_0 */ + + uint reserved6; /* reserved_6 */ + + /* Address 0x040 ~ 0x043 */ + uint state_access; /* _CMD_STATE_ACCESS_0 */ + uint state_ctrl; /* _CMD_STATE_CONTROL_0 */ + uint disp_win_header; /* _CMD_DISPLAY_WINDOW_HEADER_0 */ + uint reg_act_ctrl; /* _CMD_REG_ACT_CONTROL_0 */ +}; + +enum { + PIN_REG_COUNT = 4, + PIN_OUTPUT_SEL_COUNT = 7, +}; + +/* COM register 0x300 ~ 0x329 */ +struct dc_com_reg { + /* Address 0x300 ~ 0x301 */ + uint crc_ctrl; /* _COM_CRC_CONTROL_0 */ + uint crc_checksum; /* _COM_CRC_CHECKSUM_0 */ + + /* _COM_PIN_OUTPUT_ENABLE0/1/2/3_0: Address 0x302 ~ 0x305 */ + uint pin_output_enb[PIN_REG_COUNT]; + + /* _COM_PIN_OUTPUT_POLARITY0/1/2/3_0: Address 0x306 ~ 0x309 */ + uint pin_output_polarity[PIN_REG_COUNT]; + + /* _COM_PIN_OUTPUT_DATA0/1/2/3_0: Address 0x30a ~ 0x30d */ + uint pin_output_data[PIN_REG_COUNT]; + + /* _COM_PIN_INPUT_ENABLE0_0: Address 0x30e ~ 0x311 */ + uint pin_input_enb[PIN_REG_COUNT]; + + /* Address 0x312 ~ 0x313 */ + uint pin_input_data0; /* _COM_PIN_INPUT_DATA0_0 */ + uint pin_input_data1; /* _COM_PIN_INPUT_DATA1_0 */ + + /* _COM_PIN_OUTPUT_SELECT0/1/2/3/4/5/6_0: Address 0x314 ~ 0x31a */ + uint pin_output_sel[PIN_OUTPUT_SEL_COUNT]; + + /* Address 0x31b ~ 0x329 */ + uint pin_misc_ctrl; /* _COM_PIN_MISC_CONTROL_0 */ + uint pm0_ctrl; /* _COM_PM0_CONTROL_0 */ + uint pm0_duty_cycle; /* _COM_PM0_DUTY_CYCLE_0 */ + uint pm1_ctrl; /* _COM_PM1_CONTROL_0 */ + uint pm1_duty_cycle; /* _COM_PM1_DUTY_CYCLE_0 */ + uint spi_ctrl; /* _COM_SPI_CONTROL_0 */ + uint spi_start_byte; /* _COM_SPI_START_BYTE_0 */ + uint hspi_wr_data_ab; /* _COM_HSPI_WRITE_DATA_AB_0 */ + uint hspi_wr_data_cd; /* _COM_HSPI_WRITE_DATA_CD */ + uint hspi_cs_dc; /* _COM_HSPI_CS_DC_0 */ + uint scratch_reg_a; /* _COM_SCRATCH_REGISTER_A_0 */ + uint scratch_reg_b; /* _COM_SCRATCH_REGISTER_B_0 */ + uint gpio_ctrl; /* _COM_GPIO_CTRL_0 */ + uint gpio_debounce_cnt; /* _COM_GPIO_DEBOUNCE_COUNTER_0 */ + uint crc_checksum_latched; /* _COM_CRC_CHECKSUM_LATCHED_0 */ +}; + +enum dc_disp_h_pulse_pos { + H_PULSE0_POSITION_A, + H_PULSE0_POSITION_B, + H_PULSE0_POSITION_C, + H_PULSE0_POSITION_D, + H_PULSE0_POSITION_COUNT, +}; + +struct _disp_h_pulse { + /* _DISP_H_PULSE0/1/2_CONTROL_0 */ + uint h_pulse_ctrl; + /* _DISP_H_PULSE0/1/2_POSITION_A/B/C/D_0 */ + uint h_pulse_pos[H_PULSE0_POSITION_COUNT]; +}; + +enum dc_disp_v_pulse_pos { + V_PULSE0_POSITION_A, + V_PULSE0_POSITION_B, + V_PULSE0_POSITION_C, + V_PULSE0_POSITION_COUNT, +}; + +struct _disp_v_pulse0 { + /* _DISP_H_PULSE0/1_CONTROL_0 */ + uint v_pulse_ctrl; + /* _DISP_H_PULSE0/1_POSITION_A/B/C_0 */ + uint v_pulse_pos[V_PULSE0_POSITION_COUNT]; +}; + +struct _disp_v_pulse2 { + /* _DISP_H_PULSE2/3_CONTROL_0 */ + uint v_pulse_ctrl; + /* _DISP_H_PULSE2/3_POSITION_A_0 */ + uint v_pulse_pos_a; +}; + +enum dc_disp_h_pulse_reg { + H_PULSE0, + H_PULSE1, + H_PULSE2, + H_PULSE_COUNT, +}; + +enum dc_disp_pp_select { + PP_SELECT_A, + PP_SELECT_B, + PP_SELECT_C, + PP_SELECT_D, + PP_SELECT_COUNT, +}; + +/* DISP register 0x400 ~ 0x4c1 */ +struct dc_disp_reg { + /* Address 0x400 ~ 0x40a */ + uint disp_signal_opt0; /* _DISP_DISP_SIGNAL_OPTIONS0_0 */ + uint disp_signal_opt1; /* _DISP_DISP_SIGNAL_OPTIONS1_0 */ + uint disp_win_opt; /* _DISP_DISP_WIN_OPTIONS_0 */ + uint mem_high_pri; /* _DISP_MEM_HIGH_PRIORITY_0 */ + uint mem_high_pri_timer; /* _DISP_MEM_HIGH_PRIORITY_TIMER_0 */ + uint disp_timing_opt; /* _DISP_DISP_TIMING_OPTIONS_0 */ + uint ref_to_sync; /* _DISP_REF_TO_SYNC_0 */ + uint sync_width; /* _DISP_SYNC_WIDTH_0 */ + uint back_porch; /* _DISP_BACK_PORCH_0 */ + uint disp_active; /* _DISP_DISP_ACTIVE_0 */ + uint front_porch; /* _DISP_FRONT_PORCH_0 */ + + /* Address 0x40b ~ 0x419: _DISP_H_PULSE0/1/2_ */ + struct _disp_h_pulse h_pulse[H_PULSE_COUNT]; + + /* Address 0x41a ~ 0x421 */ + struct _disp_v_pulse0 v_pulse0; /* _DISP_V_PULSE0_ */ + struct _disp_v_pulse0 v_pulse1; /* _DISP_V_PULSE1_ */ + + /* Address 0x422 ~ 0x425 */ + struct _disp_v_pulse2 v_pulse3; /* _DISP_V_PULSE2_ */ + struct _disp_v_pulse2 v_pulse4; /* _DISP_V_PULSE3_ */ + + /* Address 0x426 ~ 0x429 */ + uint m0_ctrl; /* _DISP_M0_CONTROL_0 */ + uint m1_ctrl; /* _DISP_M1_CONTROL_0 */ + uint di_ctrl; /* _DISP_DI_CONTROL_0 */ + uint pp_ctrl; /* _DISP_PP_CONTROL_0 */ + + /* Address 0x42a ~ 0x42d: _DISP_PP_SELECT_A/B/C/D_0 */ + uint pp_select[PP_SELECT_COUNT]; + + /* Address 0x42e ~ 0x435 */ + uint disp_clk_ctrl; /* _DISP_DISP_CLOCK_CONTROL_0 */ + uint disp_interface_ctrl; /* _DISP_DISP_INTERFACE_CONTROL_0 */ + uint disp_color_ctrl; /* _DISP_DISP_COLOR_CONTROL_0 */ + uint shift_clk_opt; /* _DISP_SHIFT_CLOCK_OPTIONS_0 */ + uint data_enable_opt; /* _DISP_DATA_ENABLE_OPTIONS_0 */ + uint serial_interface_opt; /* _DISP_SERIAL_INTERFACE_OPTIONS_0 */ + uint lcd_spi_opt; /* _DISP_LCD_SPI_OPTIONS_0 */ + uint border_color; /* _DISP_BORDER_COLOR_0 */ + + /* Address 0x436 ~ 0x439 */ + uint color_key0_lower; /* _DISP_COLOR_KEY0_LOWER_0 */ + uint color_key0_upper; /* _DISP_COLOR_KEY0_UPPER_0 */ + uint color_key1_lower; /* _DISP_COLOR_KEY1_LOWER_0 */ + uint color_key1_upper; /* _DISP_COLOR_KEY1_UPPER_0 */ + + uint reserved0[2]; /* reserved_0[2] */ + + /* Address 0x43c ~ 0x442 */ + uint cursor_foreground; /* _DISP_CURSOR_FOREGROUND_0 */ + uint cursor_background; /* _DISP_CURSOR_BACKGROUND_0 */ + uint cursor_start_addr; /* _DISP_CURSOR_START_ADDR_0 */ + uint cursor_start_addr_ns; /* _DISP_CURSOR_START_ADDR_NS_0 */ + uint cursor_pos; /* _DISP_CURSOR_POSITION_0 */ + uint cursor_pos_ns; /* _DISP_CURSOR_POSITION_NS_0 */ + uint seq_ctrl; /* _DISP_INIT_SEQ_CONTROL_0 */ + + /* Address 0x442 ~ 0x446 */ + uint spi_init_seq_data_a; /* _DISP_SPI_INIT_SEQ_DATA_A_0 */ + uint spi_init_seq_data_b; /* _DISP_SPI_INIT_SEQ_DATA_B_0 */ + uint spi_init_seq_data_c; /* _DISP_SPI_INIT_SEQ_DATA_C_0 */ + uint spi_init_seq_data_d; /* _DISP_SPI_INIT_SEQ_DATA_D_0 */ + + uint reserved1[0x39]; /* reserved1[0x39], */ + + /* Address 0x480 ~ 0x484 */ + uint dc_mccif_fifoctrl; /* _DISP_DC_MCCIF_FIFOCTRL_0 */ + uint mccif_disp0a_hyst; /* _DISP_MCCIF_DISPLAY0A_HYST_0 */ + uint mccif_disp0b_hyst; /* _DISP_MCCIF_DISPLAY0B_HYST_0 */ + uint mccif_disp0c_hyst; /* _DISP_MCCIF_DISPLAY0C_HYST_0 */ + uint mccif_disp1b_hyst; /* _DISP_MCCIF_DISPLAY1B_HYST_0 */ + + uint reserved2[0x3b]; /* reserved2[0x3b] */ + + /* Address 0x4c0 ~ 0x4c1 */ + uint dac_crt_ctrl; /* _DISP_DAC_CRT_CTRL_0 */ + uint disp_misc_ctrl; /* _DISP_DISP_MISC_CONTROL_0 */ +}; + +enum dc_winc_filter_p { + WINC_FILTER_COUNT = 0x10, +}; + +/* Window A/B/C register 0x500 ~ 0x628 */ +struct dc_winc_reg { + + /* Address 0x500 */ + uint color_palette; /* _WINC_COLOR_PALETTE_0 */ + + uint reserved0[0xff]; /* reserved_0[0xff] */ + + /* Address 0x600 */ + uint palette_color_ext; /* _WINC_PALETTE_COLOR_EXT_0 */ + + /* _WINC_H_FILTER_P00~0F_0 */ + /* Address 0x601 ~ 0x610 */ + uint h_filter_p[WINC_FILTER_COUNT]; + + /* Address 0x611 ~ 0x618 */ + uint csc_yof; /* _WINC_CSC_YOF_0 */ + uint csc_kyrgb; /* _WINC_CSC_KYRGB_0 */ + uint csc_kur; /* _WINC_CSC_KUR_0 */ + uint csc_kvr; /* _WINC_CSC_KVR_0 */ + uint csc_kug; /* _WINC_CSC_KUG_0 */ + uint csc_kvg; /* _WINC_CSC_KVG_0 */ + uint csc_kub; /* _WINC_CSC_KUB_0 */ + uint csc_kvb; /* _WINC_CSC_KVB_0 */ + + /* Address 0x619 ~ 0x628: _WINC_V_FILTER_P00~0F_0 */ + uint v_filter_p[WINC_FILTER_COUNT]; +}; + +/* WIN A/B/C Register 0x700 ~ 0x714*/ +struct dc_win_reg { + /* Address 0x700 ~ 0x714 */ + uint win_opt; /* _WIN_WIN_OPTIONS_0 */ + uint byte_swap; /* _WIN_BYTE_SWAP_0 */ + uint buffer_ctrl; /* _WIN_BUFFER_CONTROL_0 */ + uint color_depth; /* _WIN_COLOR_DEPTH_0 */ + uint pos; /* _WIN_POSITION_0 */ + uint size; /* _WIN_SIZE_0 */ + uint prescaled_size; /* _WIN_PRESCALED_SIZE_0 */ + uint h_initial_dda; /* _WIN_H_INITIAL_DDA_0 */ + uint v_initial_dda; /* _WIN_V_INITIAL_DDA_0 */ + uint dda_increment; /* _WIN_DDA_INCREMENT_0 */ + uint line_stride; /* _WIN_LINE_STRIDE_0 */ + uint buf_stride; /* _WIN_BUF_STRIDE_0 */ + uint uv_buf_stride; /* _WIN_UV_BUF_STRIDE_0 */ + uint buffer_addr_mode; /* _WIN_BUFFER_ADDR_MODE_0 */ + uint dv_ctrl; /* _WIN_DV_CONTROL_0 */ + uint blend_nokey; /* _WIN_BLEND_NOKEY_0 */ + uint blend_1win; /* _WIN_BLEND_1WIN_0 */ + uint blend_2win_x; /* _WIN_BLEND_2WIN_X_0 */ + uint blend_2win_y; /* _WIN_BLEND_2WIN_Y_0 */ + uint blend_3win_xy; /* _WIN_BLEND_3WIN_XY_0 */ + uint hp_fetch_ctrl; /* _WIN_HP_FETCH_CONTROL_0 */ +}; + +/* WINBUF A/B/C Register 0x800 ~ 0x80a */ +struct dc_winbuf_reg { + /* Address 0x800 ~ 0x80a */ + uint start_addr; /* _WINBUF_START_ADDR_0 */ + uint start_addr_ns; /* _WINBUF_START_ADDR_NS_0 */ + uint start_addr_u; /* _WINBUF_START_ADDR_U_0 */ + uint start_addr_u_ns; /* _WINBUF_START_ADDR_U_NS_0 */ + uint start_addr_v; /* _WINBUF_START_ADDR_V_0 */ + uint start_addr_v_ns; /* _WINBUF_START_ADDR_V_NS_0 */ + uint addr_h_offset; /* _WINBUF_ADDR_H_OFFSET_0 */ + uint addr_h_offset_ns; /* _WINBUF_ADDR_H_OFFSET_NS_0 */ + uint addr_v_offset; /* _WINBUF_ADDR_V_OFFSET_0 */ + uint addr_v_offset_ns; /* _WINBUF_ADDR_V_OFFSET_NS_0 */ + uint uflow_status; /* _WINBUF_UFLOW_STATUS_0 */ +}; + +/* Display Controller (DC_) regs */ +struct dc_ctlr { + struct dc_cmd_reg cmd; /* CMD register 0x000 ~ 0x43 */ + uint reserved0[0x2bc]; + + struct dc_com_reg com; /* COM register 0x300 ~ 0x329 */ + uint reserved1[0xd6]; + + struct dc_disp_reg disp; /* DISP register 0x400 ~ 0x4c1 */ + uint reserved2[0x3e]; + + struct dc_winc_reg winc; /* Window A/B/C 0x500 ~ 0x628 */ + uint reserved3[0xd7]; + + struct dc_win_reg win; /* WIN A/B/C 0x700 ~ 0x714*/ + uint reserved4[0xeb]; + + struct dc_winbuf_reg winbuf; /* WINBUF A/B/C 0x800 ~ 0x80a */ +}; + +#define BIT(pos) (1U << pos) + +/* DC_CMD_DISPLAY_COMMAND 0x032 */ +#define CTRL_MODE_SHIFT 5 +#define CTRL_MODE_MASK (0x3 << CTRL_MODE_SHIFT) +enum { + CTRL_MODE_STOP, + CTRL_MODE_C_DISPLAY, + CTRL_MODE_NC_DISPLAY, +}; + +/* _WIN_COLOR_DEPTH_0 */ +enum win_color_depth_id { + COLOR_DEPTH_P1, + COLOR_DEPTH_P2, + COLOR_DEPTH_P4, + COLOR_DEPTH_P8, + COLOR_DEPTH_B4G4R4A4, + COLOR_DEPTH_B5G5R5A, + COLOR_DEPTH_B5G6R5, + COLOR_DEPTH_AB5G5R5, + COLOR_DEPTH_B8G8R8A8 = 12, + COLOR_DEPTH_R8G8B8A8, + COLOR_DEPTH_B6x2G6x2R6x2A8, + COLOR_DEPTH_R6x2G6x2B6x2A8, + COLOR_DEPTH_YCbCr422, + COLOR_DEPTH_YUV422, + COLOR_DEPTH_YCbCr420P, + COLOR_DEPTH_YUV420P, + COLOR_DEPTH_YCbCr422P, + COLOR_DEPTH_YUV422P, + COLOR_DEPTH_YCbCr422R, + COLOR_DEPTH_YUV422R, + COLOR_DEPTH_YCbCr422RA, + COLOR_DEPTH_YUV422RA, +}; + +/* DC_CMD_DISPLAY_POWER_CONTROL 0x036 */ +#define PW0_ENABLE BIT(0) +#define PW1_ENABLE BIT(2) +#define PW2_ENABLE BIT(4) +#define PW3_ENABLE BIT(6) +#define PW4_ENABLE BIT(8) +#define PM0_ENABLE BIT(16) +#define PM1_ENABLE BIT(18) +#define SPI_ENABLE BIT(24) +#define HSPI_ENABLE BIT(25) + +/* DC_CMD_STATE_CONTROL 0x041 */ +#define GENERAL_ACT_REQ BIT(0) +#define WIN_A_ACT_REQ BIT(1) +#define WIN_B_ACT_REQ BIT(2) +#define WIN_C_ACT_REQ BIT(3) +#define GENERAL_UPDATE BIT(8) +#define WIN_A_UPDATE BIT(9) +#define WIN_B_UPDATE BIT(10) +#define WIN_C_UPDATE BIT(11) + +/* DC_CMD_DISPLAY_WINDOW_HEADER 0x042 */ +#define WINDOW_A_SELECT BIT(4) +#define WINDOW_B_SELECT BIT(5) +#define WINDOW_C_SELECT BIT(6) + +/* DC_DISP_DISP_CLOCK_CONTROL 0x42e */ +#define SHIFT_CLK_DIVIDER_SHIFT 0 +#define SHIFT_CLK_DIVIDER_MASK (0xff << SHIFT_CLK_DIVIDER_SHIFT) +#define PIXEL_CLK_DIVIDER_SHIFT 8 +#define PIXEL_CLK_DIVIDER_MSK (0xf << PIXEL_CLK_DIVIDER_SHIFT) +enum { + PIXEL_CLK_DIVIDER_PCD1, + PIXEL_CLK_DIVIDER_PCD1H, + PIXEL_CLK_DIVIDER_PCD2, + PIXEL_CLK_DIVIDER_PCD3, + PIXEL_CLK_DIVIDER_PCD4, + PIXEL_CLK_DIVIDER_PCD6, + PIXEL_CLK_DIVIDER_PCD8, + PIXEL_CLK_DIVIDER_PCD9, + PIXEL_CLK_DIVIDER_PCD12, + PIXEL_CLK_DIVIDER_PCD16, + PIXEL_CLK_DIVIDER_PCD18, + PIXEL_CLK_DIVIDER_PCD24, + PIXEL_CLK_DIVIDER_PCD13, +}; + +/* DC_DISP_DISP_INTERFACE_CONTROL 0x42f */ +#define DATA_FORMAT_SHIFT 0 +#define DATA_FORMAT_MASK (0xf << DATA_FORMAT_SHIFT) +enum { + DATA_FORMAT_DF1P1C, + DATA_FORMAT_DF1P2C24B, + DATA_FORMAT_DF1P2C18B, + DATA_FORMAT_DF1P2C16B, + DATA_FORMAT_DF2S, + DATA_FORMAT_DF3S, + DATA_FORMAT_DFSPI, + DATA_FORMAT_DF1P3C24B, + DATA_FORMAT_DF1P3C18B, +}; +#define DATA_ALIGNMENT_SHIFT 8 +enum { + DATA_ALIGNMENT_MSB, + DATA_ALIGNMENT_LSB, +}; +#define DATA_ORDER_SHIFT 9 +enum { + DATA_ORDER_RED_BLUE, + DATA_ORDER_BLUE_RED, +}; + +/* DC_DISP_DATA_ENABLE_OPTIONS 0x432 */ +#define DE_SELECT_SHIFT 0 +#define DE_SELECT_MASK (0x3 << DE_SELECT_SHIFT) +#define DE_SELECT_ACTIVE_BLANK 0x0 +#define DE_SELECT_ACTIVE 0x1 +#define DE_SELECT_ACTIVE_IS 0x2 +#define DE_CONTROL_SHIFT 2 +#define DE_CONTROL_MASK (0x7 << DE_CONTROL_SHIFT) +enum { + DE_CONTROL_ONECLK, + DE_CONTROL_NORMAL, + DE_CONTROL_EARLY_EXT, + DE_CONTROL_EARLY, + DE_CONTROL_ACTIVE_BLANK, +}; + +/* DC_WIN_WIN_OPTIONS 0x700 */ +#define H_DIRECTION BIT(0) +enum { + H_DIRECTION_INCREMENT, + H_DIRECTION_DECREMENT, +}; +#define V_DIRECTION BIT(2) +enum { + V_DIRECTION_INCREMENT, + V_DIRECTION_DECREMENT, +}; +#define COLOR_EXPAND BIT(6) +#define CP_ENABLE BIT(16) +#define DV_ENABLE BIT(20) +#define WIN_ENABLE BIT(30) + +/* DC_WIN_BYTE_SWAP 0x701 */ +#define BYTE_SWAP_SHIFT 0 +#define BYTE_SWAP_MASK (3 << BYTE_SWAP_SHIFT) +enum { + BYTE_SWAP_NOSWAP, + BYTE_SWAP_SWAP2, + BYTE_SWAP_SWAP4, + BYTE_SWAP_SWAP4HW +}; + +/* DC_WIN_POSITION 0x704 */ +#define H_POSITION_SHIFT 0 +#define H_POSITION_MASK (0x1FFF << H_POSITION_SHIFT) +#define V_POSITION_SHIFT 16 +#define V_POSITION_MASK (0x1FFF << V_POSITION_SHIFT) + +/* DC_WIN_SIZE 0x705 */ +#define H_SIZE_SHIFT 0 +#define H_SIZE_MASK (0x1FFF << H_SIZE_SHIFT) +#define V_SIZE_SHIFT 16 +#define V_SIZE_MASK (0x1FFF << V_SIZE_SHIFT) + +/* DC_WIN_PRESCALED_SIZE 0x706 */ +#define H_PRESCALED_SIZE_SHIFT 0 +#define H_PRESCALED_SIZE_MASK (0x7FFF << H_PRESCALED_SIZE) +#define V_PRESCALED_SIZE_SHIFT 16 +#define V_PRESCALED_SIZE_MASK (0x1FFF << V_PRESCALED_SIZE) + +/* DC_WIN_DDA_INCREMENT 0x709 */ +#define H_DDA_INC_SHIFT 0 +#define H_DDA_INC_MASK (0xFFFF << H_DDA_INC_SHIFT) +#define V_DDA_INC_SHIFT 16 +#define V_DDA_INC_MASK (0xFFFF << V_DDA_INC_SHIFT) + +#endif /* __ASM_ARCH_TEGRA_DC_H */ diff --git a/arch/arm/include/asm/arch-tegra20/display.h b/arch/arm/include/asm/arch-tegra20/display.h new file mode 100644 index 0000000..c870959 --- /dev/null +++ b/arch/arm/include/asm/arch-tegra20/display.h @@ -0,0 +1,152 @@ +/* + * (C) Copyright 2010 + * NVIDIA Corporation <www.nvidia.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __ASM_ARCH_TEGRA_DISPLAY_H +#define __ASM_ARCH_TEGRA_DISPLAY_H + +#include <asm/arch/dc.h> +#include <fdtdec.h> + +/* This holds information about a window which can be displayed */ +struct disp_ctl_win { + enum win_color_depth_id fmt; /* Color depth/format */ + unsigned bpp; /* Bits per pixel */ + phys_addr_t phys_addr; /* Physical address in memory */ + unsigned x; /* Horizontal address offset (bytes) */ + unsigned y; /* Veritical address offset (bytes) */ + unsigned w; /* Width of source window */ + unsigned h; /* Height of source window */ + unsigned stride; /* Number of bytes per line */ + unsigned out_x; /* Left edge of output window (col) */ + unsigned out_y; /* Top edge of output window (row) */ + unsigned out_w; /* Width of output window in pixels */ + unsigned out_h; /* Height of output window in pixels */ +}; + +#define FDT_LCD_TIMINGS 4 + +enum { + FDT_LCD_TIMING_REF_TO_SYNC, + FDT_LCD_TIMING_SYNC_WIDTH, + FDT_LCD_TIMING_BACK_PORCH, + FDT_LCD_TIMING_FRONT_PORCH, + + FDT_LCD_TIMING_COUNT, +}; + +enum lcd_cache_t { + FDT_LCD_CACHE_OFF = 0, + FDT_LCD_CACHE_WRITE_THROUGH = 1 << 0, + FDT_LCD_CACHE_WRITE_BACK = 1 << 1, + FDT_LCD_CACHE_FLUSH = 1 << 2, + FDT_LCD_CACHE_WRITE_BACK_FLUSH = FDT_LCD_CACHE_WRITE_BACK | + FDT_LCD_CACHE_FLUSH, +}; + +/* Information about the display controller */ +struct fdt_disp_config { + 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 */ +}; + +/* Information about the LCD panel */ +struct fdt_panel_config { + int pwm_channel; /* PWM channel to use for backlight */ + enum lcd_cache_t cache_type; + + struct fdt_gpio_state backlight_en; /* GPIO for backlight enable */ + struct fdt_gpio_state lvds_shutdown; /* GPIO for lvds shutdown */ + struct fdt_gpio_state backlight_vdd; /* GPIO for backlight vdd */ + struct fdt_gpio_state 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]; +}; + +/** + * Register a new display based on device tree configuration. + * + * 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. + * + * @param blob Device tree blob + * @param default_lcd_base Default address of LCD frame buffer + * @return 0 if ok, -1 on error (unsupported bits per pixel) + */ +int tegra_display_probe(const void *blob, void *default_lcd_base); + +/** + * Return the current display configuration + * + * @return pointer to display configuration, or NULL if there is no valid + * config + */ +struct fdt_disp_config *tegra_display_get_config(void); + +/** + * Perform the next stage of the LCD init if it is time to do so. + * + * LCD init can be time-consuming because of the number of delays we need + * while waiting for the backlight power supply, etc. This function can + * be called at various times during U-Boot operation to advance the + * initialization of the LCD to the next stage if sufficient time has + * passed since the last stage. It keeps track of what stage it is up to + * and the time that it is permitted to move to the next stage. + * + * The final call should have wait=1 to complete the init. + * + * @param blob fdt blob containing LCD information + * @param wait 1 to wait until all init is complete, and then return + * 0 to return immediately, potentially doing nothing if it is + * not yet time for the next init. + */ +int tegra_lcd_check_next_stage(const void *blob, int wait); + +/** + * Set up the maximum LCD size so we can size the frame buffer. + * + * @param blob fdt blob containing LCD information + */ +void tegra_lcd_early_init(const void *blob); + +#endif /*__ASM_ARCH_TEGRA_DISPLAY_H*/ diff --git a/include/fdtdec.h b/include/fdtdec.h index cdc87eb..64e5cff 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -67,6 +67,7 @@ enum fdt_compat_id { COMPAT_NVIDIA_TEGRA20_KBC, /* Tegra20 Keyboard */ COMPAT_NVIDIA_TEGRA20_NAND, /* Tegra2 NAND controller */ COMPAT_NVIDIA_TEGRA20_PWM, /* Tegra 2 PWM controller */ + COMPAT_NVIDIA_TEGRA20_DC, /* Tegra 2 Display controller */
COMPAT_COUNT, }; diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 947f7c0..23e0205 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -44,6 +44,7 @@ static const char * const compat_names[COMPAT_COUNT] = { COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), + COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), };
const char *fdtdec_get_compatible(enum fdt_compat_id id)