diff options
Diffstat (limited to 'src/soc/nvidia/tegra/dp.c')
-rw-r--r-- | src/soc/nvidia/tegra/dp.c | 586 |
1 files changed, 586 insertions, 0 deletions
diff --git a/src/soc/nvidia/tegra/dp.c b/src/soc/nvidia/tegra/dp.c new file mode 100644 index 0000000000..28e30c89c4 --- /dev/null +++ b/src/soc/nvidia/tegra/dp.c @@ -0,0 +1,586 @@ +/* + * drivers/video/tegra/dc/dp.c + * + * Copyright (c) 2011-2013, NVIDIA Corporation. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include <arch/io.h> +#include <console/console.h> +#include <device/device.h> +#include <device/i2c.h> +#include <stdlib.h> +#include <string.h> +#include <delay.h> +#include <soc/addressmap.h> +#include "i2c.h" +#include "dc.h" +/* shit. This is broken. */ +#include <soc/nvidia/tegra124/sor.h> +// this is really broken. #include <soc/ardpaux.h> +#include <soc/nvidia/tegra/displayport.h> + + +extern int dump; +unsigned long READL(void* p); +void WRITEL(unsigned long value, void* p); + +static inline u32 tegra_dpaux_readl(struct tegra_dc_dp_data *dp, u32 reg) +{ + void *addr = dp->aux_base + (u32)(reg <<2); + u32 reg_val = READL(addr); + return reg_val; +} + +static inline void tegra_dpaux_writel(struct tegra_dc_dp_data *dp, + u32 reg, u32 val) +{ + void *addr = dp->aux_base + (u32)(reg <<2); + WRITEL(val, addr); +} + + +static inline u32 tegra_dc_dpaux_poll_register(struct tegra_dc_dp_data *dp, + u32 reg, u32 mask, u32 exp_val, u32 poll_interval_us, u32 timeout_ms) +{ +// unsigned long timeout_jf = jiffies + msecs_to_jiffies(timeout_ms); + u32 reg_val = 0; + + printk(BIOS_SPEW, "JZ: %s: enter, poll_reg: %#x: timeout: 0x%x\n", + __func__, reg*4, timeout_ms); + do { +// udelay(poll_interval_us); + udelay(1); + reg_val = tegra_dpaux_readl(dp, reg); + } while (((reg_val & mask) != exp_val) && (--timeout_ms > 0)); + + if ((reg_val & mask) == exp_val) + return 0; /* success */ + printk(BIOS_SPEW,"dpaux_poll_register 0x%x: timeout: (reg_val)0x%08x & (mask)0x%08x != (exp_val)0x%08x\n", reg, reg_val, mask, exp_val); + return timeout_ms; +} + + +static inline int tegra_dpaux_wait_transaction(struct tegra_dc_dp_data *dp) +{ + /* According to DP spec, each aux transaction needs to finish + within 40ms. */ + if (tegra_dc_dpaux_poll_register(dp, DPAUX_DP_AUXCTL, + DPAUX_DP_AUXCTL_TRANSACTREQ_MASK, + DPAUX_DP_AUXCTL_TRANSACTREQ_DONE, + 100, DP_AUX_TIMEOUT_MS*1000) != 0) { + printk(BIOS_SPEW,"dp: DPAUX transaction timeout\n"); + return -1; + } + return 0; +} + +static int tegra_dc_dpaux_write_chunk(struct tegra_dc_dp_data *dp, u32 cmd, + u32 addr, u8 *data, u32 *size, u32 *aux_stat) +{ + int i; + u32 reg_val; + u32 timeout_retries = DP_AUX_TIMEOUT_MAX_TRIES; + u32 defer_retries = DP_AUX_DEFER_MAX_TRIES; + u32 temp_data; + + if (*size > DP_AUX_MAX_BYTES) + return -1; /* only write one chunk of data */ + + /* Make sure the command is write command */ + switch (cmd) { + case DPAUX_DP_AUXCTL_CMD_I2CWR: + case DPAUX_DP_AUXCTL_CMD_MOTWR: + case DPAUX_DP_AUXCTL_CMD_AUXWR: + break; + default: + printk(BIOS_SPEW,"dp: aux write cmd 0x%x is invalid\n", + cmd); + return -1; + } + +#if 0 +/* interesting. */ + if (tegra_platform_is_silicon()) { + *aux_stat = tegra_dpaux_readl(dp, DPAUX_DP_AUXSTAT); + if (!(*aux_stat & DPAUX_DP_AUXSTAT_HPD_STATUS_PLUGGED)) { + printk(BIOS_SPEW,"dp: HPD is not detected\n"); + return -EFAULT; + } + } +#endif + + tegra_dpaux_writel(dp, DPAUX_DP_AUXADDR, addr); + for (i = 0; i < DP_AUX_MAX_BYTES/4; ++i) { + memcpy(&temp_data, data, 4); + tegra_dpaux_writel(dp, DPAUX_DP_AUXDATA_WRITE_W(i), + temp_data); + data += 4; + } + + reg_val = tegra_dpaux_readl(dp, DPAUX_DP_AUXCTL); + reg_val &= ~DPAUX_DP_AUXCTL_CMD_MASK; + reg_val |= cmd; + reg_val &= ~DPAUX_DP_AUXCTL_CMDLEN_FIELD; + reg_val |= ((*size-1) << DPAUX_DP_AUXCTL_CMDLEN_SHIFT); + + while ((timeout_retries > 0) && (defer_retries > 0)) { + if ((timeout_retries != DP_AUX_TIMEOUT_MAX_TRIES) || + (defer_retries != DP_AUX_DEFER_MAX_TRIES)) + udelay(1); + + reg_val |= DPAUX_DP_AUXCTL_TRANSACTREQ_PENDING; + tegra_dpaux_writel(dp, DPAUX_DP_AUXCTL, reg_val); + + if (tegra_dpaux_wait_transaction(dp)) + printk(BIOS_SPEW,"dp: aux write transaction timeout\n"); + + *aux_stat = tegra_dpaux_readl(dp, DPAUX_DP_AUXSTAT); + + if ((*aux_stat & DPAUX_DP_AUXSTAT_TIMEOUT_ERROR_PENDING) || + (*aux_stat & DPAUX_DP_AUXSTAT_RX_ERROR_PENDING) || + (*aux_stat & DPAUX_DP_AUXSTAT_SINKSTAT_ERROR_PENDING) || + (*aux_stat & DPAUX_DP_AUXSTAT_NO_STOP_ERROR_PENDING)) { + if (timeout_retries-- > 0) { + printk(BIOS_SPEW,"dp: aux write retry (0x%x) -- %d\n", + *aux_stat, timeout_retries); + /* clear the error bits */ + tegra_dpaux_writel(dp, DPAUX_DP_AUXSTAT, + *aux_stat); + continue; + } else { + printk(BIOS_SPEW,"dp: aux write got error (0x%x)\n", + *aux_stat); + return -1; + } + } + + if ((*aux_stat & DPAUX_DP_AUXSTAT_REPLYTYPE_I2CDEFER) || + (*aux_stat & DPAUX_DP_AUXSTAT_REPLYTYPE_DEFER)) { + if (defer_retries-- > 0) { + printk(BIOS_SPEW, "dp: aux write defer (0x%x) -- %d\n", + *aux_stat, defer_retries); + /* clear the error bits */ + tegra_dpaux_writel(dp, DPAUX_DP_AUXSTAT, + *aux_stat); + continue; + } else { + printk(BIOS_SPEW, "dp: aux write defer exceeds max retries " + "(0x%x)\n", + *aux_stat); + return -1; + } + } + + if ((*aux_stat & DPAUX_DP_AUXSTAT_REPLYTYPE_MASK) == + DPAUX_DP_AUXSTAT_REPLYTYPE_ACK) { + *size = ((*aux_stat) & DPAUX_DP_AUXSTAT_REPLY_M_MASK); + return 0; + } else { + printk(BIOS_SPEW,"dp: aux write failed (0x%x)\n", *aux_stat); + return -1; + } + } + /* Should never come to here */ + return -1; +} + +static int tegra_dc_dpaux_write(struct tegra_dc_dp_data *dp, u32 cmd, u32 addr, + u8 *data, u32 *size, u32 *aux_stat) +{ + u32 cur_size = 0; + u32 finished = 0; + u32 cur_left; + int ret = 0; + + do { + cur_size = *size - finished; + if (cur_size > DP_AUX_MAX_BYTES) + cur_size = DP_AUX_MAX_BYTES; + cur_left = cur_size; + ret = tegra_dc_dpaux_write_chunk(dp, cmd, addr, + data, &cur_left, aux_stat); + + cur_size -= cur_left; + finished += cur_size; + addr += cur_size; + data += cur_size; + + if (ret) + break; + } while (*size > finished); + + *size = finished; + return ret; +} + +static int tegra_dc_dpaux_read_chunk(struct tegra_dc_dp_data *dp, u32 cmd, + u32 addr, u8 *data, u32 *size, u32 *aux_stat) +{ + u32 reg_val; + u32 timeout_retries = DP_AUX_TIMEOUT_MAX_TRIES; + u32 defer_retries = DP_AUX_DEFER_MAX_TRIES; + + if (*size > DP_AUX_MAX_BYTES) + return -1; /* only read one chunk */ + + /* Check to make sure the command is read command */ + switch (cmd) { + case DPAUX_DP_AUXCTL_CMD_I2CRD: + case DPAUX_DP_AUXCTL_CMD_I2CREQWSTAT: + case DPAUX_DP_AUXCTL_CMD_MOTRD: + case DPAUX_DP_AUXCTL_CMD_AUXRD: + break; + default: + printk(BIOS_SPEW,"dp: aux read cmd 0x%x is invalid\n", cmd); + return -1; + } + + if (0){ + *aux_stat = tegra_dpaux_readl(dp, DPAUX_DP_AUXSTAT); + if (!(*aux_stat & DPAUX_DP_AUXSTAT_HPD_STATUS_PLUGGED)) { + printk(BIOS_SPEW,"dp: HPD is not detected\n"); + //return EFAULT; + } + } + + tegra_dpaux_writel(dp, DPAUX_DP_AUXADDR, addr); + + reg_val = tegra_dpaux_readl(dp, DPAUX_DP_AUXCTL); + reg_val &= ~DPAUX_DP_AUXCTL_CMD_MASK; + reg_val |= cmd; + printk(BIOS_SPEW, "cmd = %08x\n", reg_val); + reg_val &= ~DPAUX_DP_AUXCTL_CMDLEN_FIELD; + reg_val |= ((*size-1) << DPAUX_DP_AUXCTL_CMDLEN_SHIFT); + printk(BIOS_SPEW, "cmd = %08x\n", reg_val); + while ((timeout_retries > 0) && (defer_retries > 0)) { + if ((timeout_retries != DP_AUX_TIMEOUT_MAX_TRIES) || + (defer_retries != DP_AUX_DEFER_MAX_TRIES)) + udelay(DP_DPCP_RETRY_SLEEP_NS * 2); + + reg_val |= DPAUX_DP_AUXCTL_TRANSACTREQ_PENDING; + printk(BIOS_SPEW, "cmd = %08x\n", reg_val); + tegra_dpaux_writel(dp, DPAUX_DP_AUXCTL, reg_val); + + if (tegra_dpaux_wait_transaction(dp)) + printk(BIOS_SPEW,"dp: aux read transaction timeout\n"); + + *aux_stat = tegra_dpaux_readl(dp, DPAUX_DP_AUXSTAT); + printk(BIOS_SPEW, "dp: %s: aux stat: 0x%08x\n", __func__, *aux_stat); + + if ((*aux_stat & DPAUX_DP_AUXSTAT_TIMEOUT_ERROR_PENDING) || + (*aux_stat & DPAUX_DP_AUXSTAT_RX_ERROR_PENDING) || + (*aux_stat & DPAUX_DP_AUXSTAT_SINKSTAT_ERROR_PENDING) || + (*aux_stat & DPAUX_DP_AUXSTAT_NO_STOP_ERROR_PENDING)) { + if (timeout_retries-- > 0) { + printk(BIOS_SPEW, "dp: aux read retry (0x%x) -- %d\n", + *aux_stat, timeout_retries); + /* clear the error bits */ + tegra_dpaux_writel(dp, DPAUX_DP_AUXSTAT, + *aux_stat); + continue; /* retry */ + } else { + printk(BIOS_SPEW,"dp: aux read got error (0x%x)\n", + *aux_stat); + return -1; + } + } + + if ((*aux_stat & DPAUX_DP_AUXSTAT_REPLYTYPE_I2CDEFER) || + (*aux_stat & DPAUX_DP_AUXSTAT_REPLYTYPE_DEFER)) { + if (defer_retries-- > 0) { + printk(BIOS_SPEW, "dp: aux read defer (0x%x) -- %d\n", + *aux_stat, defer_retries); + /* clear the error bits */ + tegra_dpaux_writel(dp, DPAUX_DP_AUXSTAT, + *aux_stat); + continue; + } else { + printk(BIOS_SPEW,"dp: aux read defer exceeds max retries " + "(0x%x)\n", *aux_stat); + return -1; + } + } + + if ((*aux_stat & DPAUX_DP_AUXSTAT_REPLYTYPE_MASK) == + DPAUX_DP_AUXSTAT_REPLYTYPE_ACK) { + int i; + u32 temp_data[4]; + + for (i = 0; i < DP_AUX_MAX_BYTES/4; ++i) + temp_data[i] = tegra_dpaux_readl(dp, + DPAUX_DP_AUXDATA_READ_W(i)); + + *size = ((*aux_stat) & DPAUX_DP_AUXSTAT_REPLY_M_MASK); + printk(BIOS_SPEW, "dp: aux read data %d bytes\n", *size); + memcpy(data, temp_data, *size); + + return 0; + } else { + printk(BIOS_SPEW,"dp: aux read failed (0x%x\n", *aux_stat); + return -1; + } + } + /* Should never come to here */ + printk(BIOS_SPEW, "%s: can't\n", __func__); + return -1; +} + +int tegra_dc_dpaux_read(struct tegra_dc_dp_data *dp, u32 cmd, u32 addr, + u8 *data, u32 *size, u32 *aux_stat) +{ + u32 finished = 0; + u32 cur_size; + int ret = 0; + + do { + cur_size = *size - finished; + if (cur_size > DP_AUX_MAX_BYTES) + cur_size = DP_AUX_MAX_BYTES; + + ret = tegra_dc_dpaux_read_chunk(dp, cmd, addr, + data, &cur_size, aux_stat); + + /* cur_size should be the real size returned */ + addr += cur_size; + data += cur_size; + finished += cur_size; + + if (ret) + break; + +#if 0 + if (cur_size == 0) { + printk(BIOS_SPEW,"JZ: no data found, ret\n"); + break; + } +#endif + } while (*size > finished); + + *size = finished; + return ret; +} + +static int tegra_dc_dp_dpcd_read(struct tegra_dc_dp_data *dp, u32 cmd, + u8 *data_ptr) +{ + u32 size = 1; + u32 status = 0; + int ret; + + ret = tegra_dc_dpaux_read_chunk(dp, DPAUX_DP_AUXCTL_CMD_AUXRD, + cmd, data_ptr, &size, &status); + if (ret) + printk(BIOS_SPEW,"dp: Failed to read DPCD data. CMD 0x%x, Status 0x%x\n", + cmd, status); + + return ret; +} + +static int tegra_dc_dp_init_max_link_cfg(struct tegra_dc_dp_data *dp, + struct tegra_dc_dp_link_config *cfg) +{ + u8 dpcd_data; + int ret; + + ret = tegra_dc_dp_dpcd_read(dp, NV_DPCD_MAX_LANE_COUNT, + &dpcd_data); + if (ret) + return ret; + + cfg->max_lane_count = dpcd_data & NV_DPCD_MAX_LANE_COUNT_MASK; + printk(BIOS_SPEW, "JZ: %s: max_lane_count: %d\n", __func__, cfg->max_lane_count); + + cfg->support_enhanced_framing = + (dpcd_data & NV_DPCD_MAX_LANE_COUNT_ENHANCED_FRAMING_YES) ? + 1 : 0; + printk(BIOS_SPEW, "JZ: %s: enh-framing: %d\n", __func__, cfg->support_enhanced_framing); + + ret = tegra_dc_dp_dpcd_read(dp, NV_DPCD_MAX_DOWNSPREAD, + &dpcd_data); + if (ret) + return ret; + cfg->downspread = (dpcd_data & NV_DPCD_MAX_DOWNSPREAD_VAL_0_5_PCT) ? + 1 : 0; + printk(BIOS_SPEW, "JZ: %s: downspread: %d\n", __func__, cfg->downspread); + + ret = tegra_dc_dp_dpcd_read(dp, NV_DPCD_MAX_LINK_BANDWIDTH, + &cfg->max_link_bw); + if (ret) + return ret; + printk(BIOS_SPEW, "JZ: %s: max_link_bw: %d\n", __func__, cfg->max_link_bw); + + // jz, changed + // cfg->bits_per_pixel = dp->dc->pdata->default_out->depth; + cfg->bits_per_pixel = 24; + + /* TODO: need to come from the board file */ + /* Venice2 settings */ + cfg->drive_current = 0x20202020; + cfg->preemphasis = 0; + cfg->postcursor = 0; + + ret = tegra_dc_dp_dpcd_read(dp, NV_DPCD_EDP_CONFIG_CAP, + &dpcd_data); + if (ret) + return ret; + cfg->alt_scramber_reset_cap = + (dpcd_data & NV_DPCD_EDP_CONFIG_CAP_ASC_RESET_YES) ? + 1 : 0; + cfg->only_enhanced_framing = + (dpcd_data & NV_DPCD_EDP_CONFIG_CAP_FRAMING_CHANGE_YES) ? + 1 : 0; + printk(BIOS_SPEW, "JZ: %s: alt_reset_cap: %d, only_enh_framing: %d\n", __func__, + cfg->alt_scramber_reset_cap, cfg->only_enhanced_framing); + + cfg->lane_count = cfg->max_lane_count; + cfg->link_bw = cfg->max_link_bw; + cfg->enhanced_framing = cfg->support_enhanced_framing; + return 0; +} + + +//struct tegra_dc dc_data = {0}; +struct tegra_dc_sor_data sor_data = {0}; +struct tegra_dc_dp_data dp_data = {0}; + +static int tegra_dc_dpcd_read_rev(struct tegra_dc_dp_data *dp, + u8 *rev) +{ + u32 size; + int ret; + u32 status = 0; + + size = 3; + ret = tegra_dc_dpaux_read(dp, DPAUX_DP_AUXCTL_CMD_AUXRD, + NV_DPCD_REV, rev, &size, &status); + if (ret) { + printk(BIOS_SPEW,"dp: Failed to read NV_DPCD_REV\n"); + return ret; + } + return 0; +} +u32 dp_setup_timing(u32 panel_id, u32 width, u32 height); +void dp_bringup(u32 winb_addr) +{ + struct tegra_dc_dp_data *dp = &dp_data; + + u32 dpcd_rev; + u32 pclk_freq; +// int ret; + + printk(BIOS_SPEW, "JZ: %s: entry\n",__func__); + + dp->sor = &sor_data; +// dp->sor->dc = dc; + dp->sor->base = (void *)TEGRA_ARM_SOR; +// dp->sor->base_res = base_res; +// dp->sor->sor_clk = clk; + dp->sor->link_cfg = &dp->link_cfg; + dp->sor->portnum = 0; + + dp->aux_base = (void *)TEGRA_ARM_DPAUX; +/* dp->mode = 0; */ /* ???? */ + + /* read panel info */ + if (!tegra_dc_dpcd_read_rev(dp, (u8 *)&dpcd_rev)) { + printk(BIOS_SPEW,"PANEL info: \n"); + printk(BIOS_SPEW,"--DPCP version(%#x): %d.%d\n", + dpcd_rev, (dpcd_rev >> 4)&0x0f, (dpcd_rev & 0x0f)); + } + + if (tegra_dc_dp_init_max_link_cfg(dp, &dp->link_cfg)) + printk(BIOS_SPEW,"dp: failed to init link configuration\n"); + + dp_link_training((u32)(dp->link_cfg.lane_count), + (u32)(dp->link_cfg.link_bw)); + + pclk_freq = dp_setup_timing(5, 2560, 1700); // W: 2560, H: 1700, use_plld2: 1 + printk(BIOS_SPEW, "JZ: %s: pclk_freq: %d\n",__func__, pclk_freq); + +// void dp_misc_setting(u32 panel_bpp, u32 width, u32 height, u32 winb_addr) +void dp_misc_setting(u32 panel_bpp, u32 width, u32 height, u32 winb_addr, + u32 lane_count, u32 enhanced_framing, u32 panel_edp, + u32 pclkfreq, u32 linkfreq); + + dp_misc_setting(dp->link_cfg.bits_per_pixel, + 2560, 1700, winb_addr, + (u32)dp->link_cfg.lane_count, + (u32)dp->link_cfg.enhanced_framing, + (u32)dp->link_cfg.alt_scramber_reset_cap, + pclk_freq, + dp->link_cfg.link_bw * 27); + + +} + +void debug_dpaux_print(u32 addr, u32 size) +{ + struct tegra_dc_dp_data *dp = &dp_data; + u32 status = 0; + u8 buf[16]; + int i; + + if ((size == 0) || (size > 16)) { + printk(BIOS_SPEW,"dp: %s: invalid size %d\n", __func__, size); + return; + } + + if (tegra_dc_dpaux_read(dp, DPAUX_DP_AUXCTL_CMD_AUXRD, + addr, buf, &size, &status)) { + printk(BIOS_SPEW,"******AuxRead Error: 0x%04x: status 0x%08x\n", addr, status); + return; + } + printk(BIOS_SPEW, "%s: addr: 0x%04x, size: %d\n", __func__, addr, size); + for (i=0; i < size; ++i) + printk(BIOS_SPEW," %02x", buf[i]); + + printk(BIOS_SPEW,"\n"); +} + +int dpaux_read(u32 addr, u32 size, u8 *data) +{ + + struct tegra_dc_dp_data *dp = &dp_data; + u32 status = 0; + + if ((size == 0) || (size > 16)) { + printk(BIOS_SPEW,"dp: %s: invalid size %d\n", __func__, size); + return -1; + } + + if (tegra_dc_dpaux_read(dp, DPAUX_DP_AUXCTL_CMD_AUXRD, + addr, data, &size, &status)) { + printk(BIOS_SPEW,"dp: Failed to read reg %#x, status: %#x\n", addr, status); + return -1; + } + + return 0; +} + +int dpaux_write(u32 addr, u32 size, u32 data) +{ + struct tegra_dc_dp_data *dp = &dp_data; + u32 status = 0; + int ret; + + printk(BIOS_SPEW, "JZ: %s: entry, addr: 0x%08x, size: 0x%08x, data: %#x\n", + __func__, addr, size, data); + + ret = tegra_dc_dpaux_write(dp, DPAUX_DP_AUXCTL_CMD_AUXWR, + addr, (u8 *)&data, &size, &status); + if (ret) + printk(BIOS_SPEW,"dp: Failed to write to reg %#x, status: 0x%x\n", + addr, status); + return ret; +} + |