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-rw-r--r--src/soc/nvidia/tegra/displayport.h160
-rw-r--r--src/soc/nvidia/tegra124/dp.c477
-rw-r--r--src/soc/nvidia/tegra124/sor.c52
-rw-r--r--src/soc/nvidia/tegra124/sor.h7
4 files changed, 652 insertions, 44 deletions
diff --git a/src/soc/nvidia/tegra/displayport.h b/src/soc/nvidia/tegra/displayport.h
index 338ab775c1..5bf8423d11 100644
--- a/src/soc/nvidia/tegra/displayport.h
+++ b/src/soc/nvidia/tegra/displayport.h
@@ -138,6 +138,146 @@
#define DP_AUX_TIMEOUT_MS 40
#define DP_DPCP_RETRY_SLEEP_NS 400
+static const u32 tegra_dp_vs_regs[][4][4] = {
+ /* postcursor2 L0 */
+ {
+ /* pre-emphasis: L0, L1, L2, L3 */
+ {0x13, 0x19, 0x1e, 0x28}, /* voltage swing: L0 */
+ {0x1e, 0x25, 0x2d}, /* L1 */
+ {0x28, 0x32}, /* L2 */
+ {0x3c}, /* L3 */
+ },
+
+ /* postcursor2 L1 */
+ {
+ {0x12, 0x17, 0x1b, 0x25},
+ {0x1c, 0x23, 0x2a},
+ {0x25, 0x2f},
+ {0x39},
+ },
+
+ /* postcursor2 L2 */
+ {
+ {0x12, 0x16, 0x1a, 0x22},
+ {0x1b, 0x20, 0x27},
+ {0x24, 0x2d},
+ {0x36},
+ },
+
+ /* postcursor2 L3 */
+ {
+ {0x11, 0x14, 0x17, 0x1f},
+ {0x19, 0x1e, 0x24},
+ {0x22, 0x2a},
+ {0x32},
+ },
+};
+
+static const u32 tegra_dp_pe_regs[][4][4] = {
+ /* postcursor2 L0 */
+ {
+ /* pre-emphasis: L0, L1, L2, L3 */
+ {0x00, 0x09, 0x13, 0x25}, /* voltage swing: L0 */
+ {0x00, 0x0f, 0x1e}, /* L1 */
+ {0x00, 0x14}, /* L2 */
+ {0x00}, /* L3 */
+ },
+
+ /* postcursor2 L1 */
+ {
+ {0x00, 0x0a, 0x14, 0x28},
+ {0x00, 0x0f, 0x1e},
+ {0x00, 0x14},
+ {0x00},
+ },
+
+ /* postcursor2 L2 */
+ {
+ {0x00, 0x0a, 0x14, 0x28},
+ {0x00, 0x0f, 0x1e},
+ {0x00, 0x14},
+ {0x00},
+ },
+
+ /* postcursor2 L3 */
+ {
+ {0x00, 0x0a, 0x14, 0x28},
+ {0x00, 0x0f, 0x1e},
+ {0x00, 0x14},
+ {0x00},
+ },
+};
+
+static const u32 tegra_dp_pc_regs[][4][4] = {
+ /* postcursor2 L0 */
+ {
+ /* pre-emphasis: L0, L1, L2, L3 */
+ {0x00, 0x00, 0x00, 0x00}, /* voltage swing: L0 */
+ {0x00, 0x00, 0x00}, /* L1 */
+ {0x00, 0x00}, /* L2 */
+ {0x00}, /* L3 */
+ },
+
+ /* postcursor2 L1 */
+ {
+ {0x02, 0x02, 0x04, 0x05},
+ {0x02, 0x04, 0x05},
+ {0x04, 0x05},
+ {0x05},
+ },
+
+ /* postcursor2 L2 */
+ {
+ {0x04, 0x05, 0x08, 0x0b},
+ {0x05, 0x09, 0x0b},
+ {0x08, 0x0a},
+ {0x0b},
+ },
+
+ /* postcursor2 L3 */
+ {
+ {0x05, 0x09, 0x0b, 0x12},
+ {0x09, 0x0d, 0x12},
+ {0x0b, 0x0f},
+ {0x12},
+ },
+};
+
+static const u32 tegra_dp_tx_pu[][4][4] = {
+ /* postcursor2 L0 */
+ {
+ /* pre-emphasis: L0, L1, L2, L3 */
+ {0x20, 0x30, 0x40, 0x60}, /* voltage swing: L0 */
+ {0x30, 0x40, 0x60}, /* L1 */
+ {0x40, 0x60}, /* L2 */
+ {0x60}, /* L3 */
+ },
+
+ /* postcursor2 L1 */
+ {
+ {0x20, 0x20, 0x30, 0x50},
+ {0x30, 0x40, 0x50},
+ {0x40, 0x50},
+ {0x60},
+ },
+
+ /* postcursor2 L2 */
+ {
+ {0x20, 0x20, 0x30, 0x40},
+ {0x30, 0x30, 0x40},
+ {0x40, 0x50},
+ {0x60},
+ },
+
+ /* postcursor2 L3 */
+ {
+ {0x20, 0x20, 0x20, 0x40},
+ {0x30, 0x30, 0x40},
+ {0x40, 0x40},
+ {0x60},
+ },
+};
+
enum {
driveCurrent_Level0 = 0,
driveCurrent_Level1 = 1,
@@ -160,6 +300,20 @@ enum {
postCursor2_Supported
};
+static inline int tegra_dp_is_max_vs(u32 pe, u32 vs)
+{
+ return (vs < (driveCurrent_Level3 - pe)) ? 0 : 1;
+}
+
+static inline int tegra_dp_is_max_pe(u32 pe, u32 vs)
+{
+ return (pe < (preEmphasis_Level3 - vs)) ? 0 : 1;
+}
+
+static inline int tegra_dp_is_max_pc(u32 pc)
+{
+ return (pc < postCursor2_Level3) ? 0 : 1;
+}
/* the +10ms is the time for power rail going up from 10-90% or
90%-10% on powerdown */
@@ -200,6 +354,7 @@ struct tegra_dc_dp_data {
#define NV_DPCD_MAX_LANE_COUNT_LANE_1 (0x00000001)
#define NV_DPCD_MAX_LANE_COUNT_LANE_2 (0x00000002)
#define NV_DPCD_MAX_LANE_COUNT_LANE_4 (0x00000004)
+#define NV_DPCD_MAX_LANE_COUNT_TPS3_SUPPORTED_YES (0x00000001 << 6)
#define NV_DPCD_MAX_LANE_COUNT_ENHANCED_FRAMING_NO (0x00000000 << 7)
#define NV_DPCD_MAX_LANE_COUNT_ENHANCED_FRAMING_YES (0x00000001 << 7)
#define NV_DPCD_MAX_DOWNSPREAD (0x00000003)
@@ -212,6 +367,7 @@ struct tegra_dc_dp_data {
#define NV_DPCD_EDP_CONFIG_CAP_ASC_RESET_YES (0x00000001)
#define NV_DPCD_EDP_CONFIG_CAP_FRAMING_CHANGE_NO (0x00000000 << 1)
#define NV_DPCD_EDP_CONFIG_CAP_FRAMING_CHANGE_YES (0x00000001 << 1)
+#define NV_DPCD_TRAINING_AUX_RD_INTERVAL (0x0000000E)
#define NV_DPCD_LINK_BANDWIDTH_SET (0x00000100)
#define NV_DPCD_LANE_COUNT_SET (0x00000101)
#define NV_DPCD_LANE_COUNT_SET_ENHANCEDFRAMING_F (0x00000000 << 7)
@@ -230,8 +386,10 @@ struct tegra_dc_dp_data {
#define NV_DPCD_TRAINING_LANE3_SET (0x00000106)
#define NV_DPCD_TRAINING_LANEX_SET_DC_SHIFT 0
#define NV_DPCD_TRAINING_LANEX_SET_DC_MAX_REACHED_T (0x00000001 << 2)
+#define NV_DPCD_TRAINING_LANEX_SET_DC_MAX_REACHED_F (0x00000000 << 2)
#define NV_DPCD_TRAINING_LANEX_SET_PE_SHIFT 3
#define NV_DPCD_TRAINING_LANEX_SET_PE_MAX_REACHED_T (0x00000001 << 5)
+#define NV_DPCD_TRAINING_LANEX_SET_PE_MAX_REACHED_F (0x00000000 << 5)
#define NV_DPCD_DOWNSPREAD_CTRL (0x00000107)
#define NV_DPCD_DOWNSPREAD_CTRL_SPREAD_AMP_NONE (0x00000000 << 4)
#define NV_DPCD_DOWNSPREAD_CTRL_SPREAD_AMP_LT_0_5 (0x00000001 << 4)
@@ -246,8 +404,10 @@ struct tegra_dc_dp_data {
#define NV_DPCD_TRAINING_LANE2_3_SET2 (0x00000110)
#define NV_DPCD_LANEX_SET2_PC2_SHIFT 0
#define NV_DPCD_LANEX_SET2_PC2_MAX_REACHED_T (0x00000001 << 2)
+#define NV_DPCD_LANEX_SET2_PC2_MAX_REACHED_F (0x00000000 << 2)
#define NV_DPCD_LANEXPLUS1_SET2_PC2_SHIFT 4
#define NV_DPCD_LANEXPLUS1_SET2_PC2_MAX_REACHED_T (0x00000001 << 6)
+#define NV_DPCD_LANEXPLUS1_SET2_PC2_MAX_REACHED_F (0x00000000 << 6)
#define NV_DPCD_SINK_COUNT (0x00000200)
#define NV_DPCD_DEVICE_SERVICE_IRQ_VECTOR (0x00000201)
#define NV_DPCD_DEVICE_SERVICE_IRQ_VECTOR_AUTO_TEST_NO (0x00000000 << 1)
diff --git a/src/soc/nvidia/tegra124/dp.c b/src/soc/nvidia/tegra124/dp.c
index 00474a882a..9ff50ead8d 100644
--- a/src/soc/nvidia/tegra124/dp.c
+++ b/src/soc/nvidia/tegra124/dp.c
@@ -30,6 +30,11 @@
#include "sor.h"
#include <soc/nvidia/tegra/displayport.h>
+enum {
+ DP_LT_SUCCESS = 0,
+ DP_LT_FAILED = -1,
+};
+
struct tegra_dc_dp_data dp_data;
static inline u32 tegra_dpaux_readl(struct tegra_dc_dp_data *dp, u32 reg)
@@ -443,6 +448,34 @@ static void tegra_dc_dp_dump_link_cfg(struct tegra_dc_dp_data *dp,
link_cfg->vblank_sym);
}
+static int _tegra_dp_lower_link_config(struct tegra_dc_dp_data *dp,
+ struct tegra_dc_dp_link_config *cfg)
+{
+
+ switch (cfg->link_bw){
+ case SOR_LINK_SPEED_G1_62:
+ if (cfg->max_link_bw > SOR_LINK_SPEED_G1_62)
+ cfg->link_bw = SOR_LINK_SPEED_G2_7;
+ cfg->lane_count /= 2;
+ break;
+ case SOR_LINK_SPEED_G2_7:
+ cfg->link_bw = SOR_LINK_SPEED_G1_62;
+ break;
+ case SOR_LINK_SPEED_G5_4:
+ if (cfg->lane_count == 1) {
+ cfg->link_bw = SOR_LINK_SPEED_G2_7;
+ cfg->lane_count = cfg->max_lane_count;
+ } else
+ cfg->lane_count /= 2;
+ break;
+ default:
+ printk(BIOS_ERR,"dp: Error link rate %d\n", cfg->link_bw);
+ return DP_LT_FAILED;
+ }
+
+ return (cfg->lane_count > 0) ? DP_LT_SUCCESS : DP_LT_FAILED;
+}
+
/* Calcuate if given cfg can meet the mode request. */
/* Return true if mode is possible, false otherwise. */
static int tegra_dc_dp_calc_config(struct tegra_dc_dp_data *dp,
@@ -624,6 +657,8 @@ static int tegra_dc_dp_init_max_link_cfg(
CHECK_RET(tegra_dc_dp_dpcd_read(dp, NV_DPCD_MAX_LANE_COUNT,
&dpcd_data));
link_cfg->max_lane_count = dpcd_data & NV_DPCD_MAX_LANE_COUNT_MASK;
+ link_cfg->tps3_supported = (dpcd_data &
+ NV_DPCD_MAX_LANE_COUNT_TPS3_SUPPORTED_YES) ? 1 : 0;
link_cfg->support_enhanced_framing =
(dpcd_data & NV_DPCD_MAX_LANE_COUNT_ENHANCED_FRAMING_YES) ?
@@ -634,6 +669,9 @@ static int tegra_dc_dp_init_max_link_cfg(
link_cfg->downspread = (dpcd_data & NV_DPCD_MAX_DOWNSPREAD_VAL_0_5_PCT)?
1 : 0;
+ CHECK_RET(tegra_dc_dp_dpcd_read(dp, NV_DPCD_TRAINING_AUX_RD_INTERVAL,
+ &link_cfg->aux_rd_interval));
+
CHECK_RET(tegra_dc_dp_dpcd_read(dp, NV_DPCD_MAX_LINK_BANDWIDTH,
&link_cfg->max_link_bw));
@@ -732,6 +770,392 @@ static int tegra_dc_dp_link_trained(struct tegra_dc_dp_data *dp,
return 0;
}
+static int tegra_dp_channel_eq_status(struct tegra_dc_dp_data *dp)
+{
+ u32 cnt;
+ u32 n_lanes = dp->link_cfg.lane_count;
+ u8 data;
+ u8 ce_done = 1;
+
+ for (cnt = 0; cnt < n_lanes / 2; cnt++) {
+ tegra_dc_dp_dpcd_read(dp, (NV_DPCD_LANE0_1_STATUS + cnt), &data);
+
+ if (n_lanes == 1) {
+ ce_done = (data &
+ (0x1 << NV_DPCD_STATUS_LANEX_CHN_EQ_DONE_SHIFT)) &&
+ (data & (0x1 << NV_DPCD_STATUS_LANEX_SYMBOL_LOCKED_SHFIT));
+ break;
+ } else if (!(data & (0x1 << NV_DPCD_STATUS_LANEX_CHN_EQ_DONE_SHIFT)) ||
+ !(data & (0x1 << NV_DPCD_STATUS_LANEX_SYMBOL_LOCKED_SHFIT)) ||
+ !(data & (0x1 << NV_DPCD_STATUS_LANEXPLUS1_CHN_EQ_DONE_SHIFT)) ||
+ !(data & (0x1 << NV_DPCD_STATUS_LANEXPLUS1_SYMBOL_LOCKED_SHIFT)))
+ return 0;
+ }
+
+ if (ce_done) {
+ tegra_dc_dp_dpcd_read(dp, NV_DPCD_LANE_ALIGN_STATUS_UPDATED, &data);
+ if (!(data & NV_DPCD_LANE_ALIGN_STATUS_UPDATED_DONE_YES))
+ ce_done = 0;
+ }
+
+ return ce_done;
+}
+
+static u8 tegra_dp_clock_recovery_status(struct tegra_dc_dp_data *dp)
+{
+ u32 cnt;
+ u32 n_lanes = dp->link_cfg.lane_count;
+ u8 data_ptr;
+
+ for (cnt = 0; cnt < n_lanes / 2; cnt++) {
+ tegra_dc_dp_dpcd_read(dp,
+ (NV_DPCD_LANE0_1_STATUS + cnt), &data_ptr);
+
+ if (n_lanes == 1)
+ return (data_ptr & NV_DPCD_STATUS_LANEX_CR_DONE_YES) ? 1 : 0;
+ else if (!(data_ptr & NV_DPCD_STATUS_LANEX_CR_DONE_YES) ||
+ !(data_ptr &
+ (NV_DPCD_STATUS_LANEXPLUS1_CR_DONE_YES)))
+ return 0;
+ }
+
+ return 1;
+}
+
+static void tegra_dp_lt_adjust(struct tegra_dc_dp_data *dp,
+ u32 pe[4], u32 vs[4], u32 pc[4],
+ u8 pc_supported)
+{
+ size_t cnt;
+ u8 data_ptr;
+ u32 n_lanes = dp->link_cfg.lane_count;
+
+ for (cnt = 0; cnt < n_lanes / 2; cnt++) {
+ tegra_dc_dp_dpcd_read(dp,
+ (NV_DPCD_LANE0_1_ADJUST_REQ + cnt), &data_ptr);
+ pe[2 * cnt] = (data_ptr & NV_DPCD_ADJUST_REQ_LANEX_PE_MASK) >>
+ NV_DPCD_ADJUST_REQ_LANEX_PE_SHIFT;
+ vs[2 * cnt] = (data_ptr & NV_DPCD_ADJUST_REQ_LANEX_DC_MASK) >>
+ NV_DPCD_ADJUST_REQ_LANEX_DC_SHIFT;
+ pe[1 + 2 * cnt] =
+ (data_ptr & NV_DPCD_ADJUST_REQ_LANEXPLUS1_PE_MASK) >>
+ NV_DPCD_ADJUST_REQ_LANEXPLUS1_PE_SHIFT;
+ vs[1 + 2 * cnt] =
+ (data_ptr & NV_DPCD_ADJUST_REQ_LANEXPLUS1_DC_MASK) >>
+ NV_DPCD_ADJUST_REQ_LANEXPLUS1_DC_SHIFT;
+ }
+ if (pc_supported) {
+ tegra_dc_dp_dpcd_read(dp,
+ NV_DPCD_ADJUST_REQ_POST_CURSOR2, &data_ptr);
+ for (cnt = 0; cnt < n_lanes; cnt++) {
+ pc[cnt] = (data_ptr >>
+ NV_DPCD_ADJUST_REQ_POST_CURSOR2_LANE_SHIFT(cnt)) &
+ NV_DPCD_ADJUST_REQ_POST_CURSOR2_LANE_MASK;
+ }
+ }
+}
+
+static inline u32 tegra_dp_wait_aux_training(struct tegra_dc_dp_data *dp,
+ u8 is_clk_recovery)
+{
+ if (!dp->link_cfg.aux_rd_interval)
+ is_clk_recovery ? udelay(200) :
+ udelay(500);
+ else
+ mdelay(dp->link_cfg.aux_rd_interval * 4);
+
+ return dp->link_cfg.aux_rd_interval;
+}
+
+static void tegra_dp_tpg(struct tegra_dc_dp_data *dp, u32 tp, u32 n_lanes)
+{
+ u8 data = (tp == training_pattern_disabled)
+ ? (tp | NV_DPCD_TRAINING_PATTERN_SET_SC_DISABLED_F)
+ : (tp | NV_DPCD_TRAINING_PATTERN_SET_SC_DISABLED_T);
+
+ tegra_dc_sor_set_dp_linkctl(&dp->sor, 1, tp, &dp->link_cfg);
+ tegra_dc_dp_dpcd_write(dp, NV_DPCD_TRAINING_PATTERN_SET, data);
+}
+
+static int tegra_dp_link_config(struct tegra_dc_dp_data *dp,
+ const struct tegra_dc_dp_link_config *link_cfg)
+{
+ u8 dpcd_data;
+ u32 retry;
+
+ if (link_cfg->lane_count == 0) {
+ printk(BIOS_ERR, "dp: error: lane count is 0. "
+ "Can not set link config.\n");
+ return DP_LT_FAILED;
+ }
+
+ /* Set power state if it is not in normal level */
+ if(tegra_dc_dp_dpcd_read(dp, NV_DPCD_SET_POWER, &dpcd_data))
+ return DP_LT_FAILED;
+
+ if (dpcd_data == NV_DPCD_SET_POWER_VAL_D3_PWRDWN) {
+ dpcd_data = NV_DPCD_SET_POWER_VAL_D0_NORMAL;
+
+ /* DP spec requires 3 retries */
+ for (retry = 3; retry > 0; --retry){
+ if (tegra_dc_dp_dpcd_write(dp, NV_DPCD_SET_POWER, dpcd_data))
+ break;
+ if (retry == 1){
+ printk(BIOS_ERR, "dp: Failed to set DP panel power\n");
+ return DP_LT_FAILED;
+ }
+ }
+ }
+
+ /* Enable ASSR if possible */
+ if (link_cfg->alt_scramber_reset_cap)
+ if(tegra_dc_dp_set_assr(dp, 1))
+ return DP_LT_FAILED;
+
+ if (tegra_dp_set_link_bandwidth(dp, link_cfg->link_bw)) {
+ printk(BIOS_ERR, "dp: Failed to set link bandwidth\n");
+ return DP_LT_FAILED;
+ }
+ if (tegra_dp_set_lane_count(dp, link_cfg)) {
+ printk(BIOS_ERR, "dp: Failed to set lane count\n");
+ return DP_LT_FAILED;
+ }
+ tegra_dc_sor_set_dp_linkctl(&dp->sor, 1, training_pattern_none,
+ link_cfg);
+ return DP_LT_SUCCESS;
+}
+
+static int tegra_dp_lower_link_config(struct tegra_dc_dp_data *dp,
+ struct tegra_dc_dp_link_config *cfg)
+{
+ struct tegra_dc_dp_link_config tmp_cfg;
+
+ tmp_cfg = dp->link_cfg;
+ cfg->is_valid = 0;
+
+ if (_tegra_dp_lower_link_config(dp, cfg))
+ goto fail;
+
+ if (tegra_dc_dp_calc_config(dp, dp->dc->config, cfg))
+ goto fail;
+ tegra_dp_link_config(dp, cfg);
+
+ return DP_LT_SUCCESS;
+fail:
+ dp->link_cfg = tmp_cfg;
+ tegra_dp_link_config(dp, &tmp_cfg);
+ return DP_LT_FAILED;
+}
+
+static void tegra_dp_lt_config(struct tegra_dc_dp_data *dp,
+ u32 pe[4], u32 vs[4], u32 pc[4])
+{
+ struct tegra_dc_sor_data *sor = &dp->sor;
+ u32 n_lanes = dp->link_cfg.lane_count;
+ u8 pc_supported = dp->link_cfg.tps3_supported;
+ u32 cnt;
+ u32 val;
+
+ for (cnt = 0; cnt < n_lanes; cnt++) {
+ u32 mask = 0;
+ u32 pe_reg, vs_reg, pc_reg;
+ u32 shift = 0;
+
+ switch (cnt) {
+ case 0:
+ mask = NV_SOR_PR_LANE2_DP_LANE0_MASK;
+ shift = NV_SOR_PR_LANE2_DP_LANE0_SHIFT;
+ break;
+ case 1:
+ mask = NV_SOR_PR_LANE1_DP_LANE1_MASK;
+ shift = NV_SOR_PR_LANE1_DP_LANE1_SHIFT;
+ break;
+ case 2:
+ mask = NV_SOR_PR_LANE0_DP_LANE2_MASK;
+ shift = NV_SOR_PR_LANE0_DP_LANE2_SHIFT;
+ break;
+ case 3:
+ mask = NV_SOR_PR_LANE3_DP_LANE3_MASK;
+ shift = NV_SOR_PR_LANE3_DP_LANE3_SHIFT;
+ break;
+ default:
+ printk(BIOS_ERR,
+ "dp: incorrect lane cnt\n");
+ }
+
+ pe_reg = tegra_dp_pe_regs[pc[cnt]][vs[cnt]][pe[cnt]];
+ vs_reg = tegra_dp_vs_regs[pc[cnt]][vs[cnt]][pe[cnt]];
+ pc_reg = tegra_dp_pc_regs[pc[cnt]][vs[cnt]][pe[cnt]];
+
+ tegra_dp_set_pe_vs_pc(sor, mask, pe_reg << shift,
+ vs_reg << shift, pc_reg << shift, pc_supported);
+ }
+
+ tegra_dp_disable_tx_pu(&dp->sor);
+ udelay(20);
+
+ for (cnt = 0; cnt < n_lanes; cnt++) {
+ u32 max_vs_flag = tegra_dp_is_max_vs(pe[cnt], vs[cnt]);
+ u32 max_pe_flag = tegra_dp_is_max_pe(pe[cnt], vs[cnt]);
+
+ val = (vs[cnt] << NV_DPCD_TRAINING_LANEX_SET_DC_SHIFT) |
+ (max_vs_flag ?
+ NV_DPCD_TRAINING_LANEX_SET_DC_MAX_REACHED_T :
+ NV_DPCD_TRAINING_LANEX_SET_DC_MAX_REACHED_F) |
+ (pe[cnt] << NV_DPCD_TRAINING_LANEX_SET_PE_SHIFT) |
+ (max_pe_flag ?
+ NV_DPCD_TRAINING_LANEX_SET_PE_MAX_REACHED_T :
+ NV_DPCD_TRAINING_LANEX_SET_PE_MAX_REACHED_F);
+ tegra_dc_dp_dpcd_write(dp,
+ (NV_DPCD_TRAINING_LANE0_SET + cnt), val);
+ }
+
+ if (pc_supported) {
+ for (cnt = 0; cnt < n_lanes / 2; cnt++) {
+ u32 max_pc_flag0 = tegra_dp_is_max_pc(pc[cnt]);
+ u32 max_pc_flag1 = tegra_dp_is_max_pc(pc[cnt + 1]);
+ val = (pc[cnt] << NV_DPCD_LANEX_SET2_PC2_SHIFT) |
+ (max_pc_flag0 ?
+ NV_DPCD_LANEX_SET2_PC2_MAX_REACHED_T :
+ NV_DPCD_LANEX_SET2_PC2_MAX_REACHED_F) |
+ (pc[cnt + 1] <<
+ NV_DPCD_LANEXPLUS1_SET2_PC2_SHIFT) |
+ (max_pc_flag1 ?
+ NV_DPCD_LANEXPLUS1_SET2_PC2_MAX_REACHED_T :
+ NV_DPCD_LANEXPLUS1_SET2_PC2_MAX_REACHED_F);
+ tegra_dc_dp_dpcd_write(dp,
+ (NV_DPCD_TRAINING_LANE0_1_SET2 + cnt), val);
+ }
+ }
+}
+
+static int _tegra_dp_channel_eq(struct tegra_dc_dp_data *dp, u32 pe[4],
+ u32 vs[4], u32 pc[4], u8 pc_supported,
+ u32 n_lanes)
+{
+ u32 retry_cnt;
+
+ for (retry_cnt = 0; retry_cnt < 4; retry_cnt++) {
+ if (retry_cnt){
+ tegra_dp_lt_adjust(dp, pe, vs, pc, pc_supported);
+ tegra_dp_lt_config(dp, pe, vs, pc);
+ }
+
+ tegra_dp_wait_aux_training(dp, 0);
+
+ if (!tegra_dp_clock_recovery_status(dp)) {
+ printk(BIOS_ERR,"dp: CR failed in channel EQ sequence!\n");
+ break;
+ }
+
+ if (tegra_dp_channel_eq_status(dp))
+ return DP_LT_SUCCESS;
+ }
+
+ return DP_LT_FAILED;
+}
+
+static int tegra_dp_channel_eq(struct tegra_dc_dp_data *dp,
+ u32 pe[4], u32 vs[4], u32 pc[4])
+{
+ u32 n_lanes = dp->link_cfg.lane_count;
+ u8 pc_supported = dp->link_cfg.tps3_supported;
+ int err;
+ u32 tp_src = training_pattern_2;
+
+ if (pc_supported)
+ tp_src = training_pattern_3;
+
+ tegra_dp_tpg(dp, tp_src, n_lanes);
+
+ err = _tegra_dp_channel_eq(dp, pe, vs, pc, pc_supported, n_lanes);
+
+ tegra_dp_tpg(dp, training_pattern_disabled, n_lanes);
+
+ return err;
+}
+
+static int _tegra_dp_clk_recovery(struct tegra_dc_dp_data *dp, u32 pe[4],
+ u32 vs[4], u32 pc[4], u8 pc_supported,
+ u32 n_lanes)
+{
+ u32 vs_temp[4];
+ u32 retry_cnt = 0;
+
+ do {
+ tegra_dp_lt_config(dp, pe, vs, pc);
+ tegra_dp_wait_aux_training(dp, 1);
+
+ if (tegra_dp_clock_recovery_status(dp))
+ return DP_LT_SUCCESS;
+
+ memcpy(vs_temp, vs, sizeof(vs_temp));
+ tegra_dp_lt_adjust(dp, pe, vs, pc, pc_supported);
+
+ if (memcmp(vs_temp, vs, sizeof(vs_temp)))
+ retry_cnt = 0;
+ else
+ ++retry_cnt;
+ } while (retry_cnt < 5);
+
+ return DP_LT_FAILED;
+}
+
+static int tegra_dp_clk_recovery(struct tegra_dc_dp_data *dp,
+ u32 pe[4], u32 vs[4], u32 pc[4])
+{
+ u32 n_lanes = dp->link_cfg.lane_count;
+ u8 pc_supported = dp->link_cfg.tps3_supported;
+ int err;
+
+ tegra_dp_tpg(dp, training_pattern_1, n_lanes);
+
+ err = _tegra_dp_clk_recovery(dp, pe, vs, pc, pc_supported, n_lanes);
+ if (err < 0)
+ tegra_dp_tpg(dp, training_pattern_disabled, n_lanes);
+
+ return err;
+}
+
+static int tegra_dc_dp_full_link_training(struct tegra_dc_dp_data *dp)
+{
+ struct tegra_dc_sor_data *sor = &dp->sor;
+ int err;
+ u32 pe[4], vs[4], pc[4];
+
+ tegra_sor_precharge_lanes(sor);
+
+retry_cr:
+ memset(pe, preEmphasis_Disabled, sizeof(pe));
+ memset(vs, driveCurrent_Level0, sizeof(vs));
+ memset(pc, postCursor2_Level0, sizeof(pc));
+
+ err = tegra_dp_clk_recovery(dp, pe, vs, pc);
+ if (err != DP_LT_SUCCESS) {
+ if (!tegra_dp_lower_link_config(dp, &dp->link_cfg))
+ goto retry_cr;
+
+ printk(BIOS_ERR, "dp: clk recovery failed\n");
+ goto fail;
+ }
+
+ err = tegra_dp_channel_eq(dp, pe, vs, pc);
+ if (err != DP_LT_SUCCESS) {
+ if (!tegra_dp_lower_link_config(dp, &dp->link_cfg))
+ goto retry_cr;
+
+ printk(BIOS_ERR,
+ "dp: channel equalization failed\n");
+ goto fail;
+ }
+
+ tegra_dc_dp_dump_link_cfg(dp, &dp->link_cfg);
+
+ return 0;
+
+fail:
+ return err;
+}
/*
* All link training functions are ported from kernel dc driver.
* See more details at drivers/video/tegra/dc/dp.c
@@ -813,59 +1237,23 @@ static int tegra_dc_dp_fast_link_training(struct tegra_dc_dp_data *dp,
return 0;
}
-static int tegra_dp_link_config(struct tegra_dc_dp_data *dp,
+static int tegra_dp_do_link_training(struct tegra_dc_dp_data *dp,
const struct tegra_dc_dp_link_config *link_cfg)
{
- u8 dpcd_data;
u8 link_bw;
u8 lane_count;
- u32 retry;
int ret;
- if (link_cfg->lane_count == 0) {
- printk(BIOS_ERR, "dp: error: lane count is 0. "
- "Can not set link config.\n");
- return -1;
- }
-
- /* Set power state if it is not in normal level */
- CHECK_RET(tegra_dc_dp_dpcd_read(dp, NV_DPCD_SET_POWER, &dpcd_data));
- if (dpcd_data == NV_DPCD_SET_POWER_VAL_D3_PWRDWN) {
- dpcd_data = NV_DPCD_SET_POWER_VAL_D0_NORMAL;
- retry = 3; /* DP spec requires 3 retries */
- do {
- ret = tegra_dc_dp_dpcd_write(dp,
- NV_DPCD_SET_POWER, dpcd_data);
- } while ((--retry > 0) && ret);
- if (ret) {
- printk(BIOS_ERR,
- "dp: Failed to set DP panel power\n");
- return ret;
- }
- }
-
- /* Enable ASSR if possible */
- if (link_cfg->alt_scramber_reset_cap)
- CHECK_RET(tegra_dc_dp_set_assr(dp, 1));
-
- ret = tegra_dp_set_link_bandwidth(dp, link_cfg->link_bw);
- if (ret) {
- printk(BIOS_ERR, "dp: Failed to set link bandwidth\n");
- return ret;
- }
- ret = tegra_dp_set_lane_count(dp, link_cfg);
- if (ret) {
- printk(BIOS_ERR, "dp: Failed to set lane count\n");
- return ret;
- }
- tegra_dc_sor_set_dp_linkctl(&dp->sor, 1, training_pattern_none,
- link_cfg);
-
/* Now do the fast link training for eDP */
ret = tegra_dc_dp_fast_link_training(dp, link_cfg);
if (ret) {
printk(BIOS_ERR, "dp: fast link training failed\n");
- return ret;
+
+ /* Try full link training then */
+ if (tegra_dc_dp_full_link_training(dp)){
+ printk(BIOS_ERR, "dp: full link training failed\n");
+ return ret;
+ }
}
/* Everything goes well, double check the link config */
@@ -907,7 +1295,8 @@ static int tegra_dc_dp_explore_link_cfg(struct tegra_dc_dp_data *dp,
* set to max link config
*/
if ((!tegra_dc_dp_calc_config(dp, config, &temp_cfg)) &&
- (!(tegra_dp_link_config(dp, &temp_cfg))))
+ (!tegra_dp_link_config(dp, &temp_cfg)) &&
+ (!tegra_dp_do_link_training(dp, &temp_cfg)))
/* the max link cfg is doable */
memcpy(link_cfg, &temp_cfg, sizeof(temp_cfg));
diff --git a/src/soc/nvidia/tegra124/sor.c b/src/soc/nvidia/tegra124/sor.c
index 2c059bf066..1f9df6ce06 100644
--- a/src/soc/nvidia/tegra124/sor.c
+++ b/src/soc/nvidia/tegra124/sor.c
@@ -79,6 +79,28 @@ static inline void tegra_sor_write_field(struct tegra_dc_sor_data *sor,
tegra_sor_writel(sor, reg, reg_val);
}
+void tegra_dp_disable_tx_pu(struct tegra_dc_sor_data *sor)
+{
+ tegra_sor_write_field(sor,
+ NV_SOR_DP_PADCTL(sor->portnum),
+ NV_SOR_DP_PADCTL_TX_PU_MASK,
+ NV_SOR_DP_PADCTL_TX_PU_DISABLE);
+}
+
+void tegra_dp_set_pe_vs_pc(struct tegra_dc_sor_data *sor, u32 mask,
+ u32 pe_reg, u32 vs_reg, u32 pc_reg, u8 pc_supported)
+{
+ tegra_sor_write_field(sor, NV_SOR_PR(sor->portnum),
+ mask, pe_reg);
+ tegra_sor_write_field(sor, NV_SOR_DC(sor->portnum),
+ mask, vs_reg);
+ if (pc_supported) {
+ tegra_sor_write_field(
+ sor, NV_SOR_POSTCURSOR(sor->portnum),
+ mask, pc_reg);
+ }
+}
+
static u32 tegra_dc_sor_poll_register(struct tegra_dc_sor_data *sor,
u32 reg, u32 mask, u32 exp_val, u32 poll_interval_us, u32 timeout_us)
{
@@ -873,3 +895,33 @@ void tegra_dc_sor_power_down_unused_lanes(struct tegra_dc_sor_data *sor)
drive_current);
tegra_sor_writel(sor, NV_SOR_PR(sor->portnum), pre_emphasis);
}
+
+void tegra_sor_precharge_lanes(struct tegra_dc_sor_data *sor)
+{
+ const struct tegra_dc_dp_link_config *cfg = sor->link_cfg;
+ u32 val = 0;
+
+ switch (cfg->lane_count) {
+ case 4:
+ val |= (NV_SOR_DP_PADCTL_PD_TXD_3_NO |
+ NV_SOR_DP_PADCTL_PD_TXD_2_NO);
+ /* fall through */
+ case 2:
+ val |= NV_SOR_DP_PADCTL_PD_TXD_1_NO;
+ /* fall through */
+ case 1:
+ val |= NV_SOR_DP_PADCTL_PD_TXD_0_NO;
+ break;
+ default:
+ printk(BIOS_ERR,
+ "dp: invalid lane number %d\n", cfg->lane_count);
+ return;
+ }
+
+ tegra_sor_write_field(sor, NV_SOR_DP_PADCTL(sor->portnum),
+ (0xf << NV_SOR_DP_PADCTL_COMODE_TXD_0_DP_TXD_2_SHIFT),
+ (val << NV_SOR_DP_PADCTL_COMODE_TXD_0_DP_TXD_2_SHIFT));
+ udelay(100);
+ tegra_sor_write_field(sor, NV_SOR_DP_PADCTL(sor->portnum),
+ (0xf << NV_SOR_DP_PADCTL_COMODE_TXD_0_DP_TXD_2_SHIFT), 0);
+}
diff --git a/src/soc/nvidia/tegra124/sor.h b/src/soc/nvidia/tegra124/sor.h
index bf6286871e..4e4211e45e 100644
--- a/src/soc/nvidia/tegra124/sor.h
+++ b/src/soc/nvidia/tegra124/sor.h
@@ -695,6 +695,7 @@
#define NV_SOR_DP_PADCTL_TX_PU_SHIFT (22)
#define NV_SOR_DP_PADCTL_TX_PU_DISABLE (0 << 22)
#define NV_SOR_DP_PADCTL_TX_PU_ENABLE (1 << 22)
+#define NV_SOR_DP_PADCTL_TX_PU_MASK (1 << 22)
#define NV_SOR_DP_PADCTL_REG_CTRL_SHIFT (20)
#define NV_SOR_DP_PADCTL_REG_CTRL_DEFAULT_MASK (0x3 << 20)
#define NV_SOR_DP_PADCTL_VCMMODE_SHIFT (16)
@@ -878,6 +879,8 @@ struct tegra_dc_dp_link_config {
u32 drive_current;
u32 preemphasis;
u32 postcursor;
+ u8 aux_rd_interval;
+ u8 tps3_supported;
};
/* TODO: just pull these up into one struct? Need to see how this impacts
@@ -917,4 +920,8 @@ void tegra_dc_sor_attach(struct tegra_dc_sor_data *sor);
void tegra_dc_sor_set_lane_parm(struct tegra_dc_sor_data *sor,
const struct tegra_dc_dp_link_config *link_cfg);
void tegra_dc_sor_power_down_unused_lanes(struct tegra_dc_sor_data *sor);
+void tegra_sor_precharge_lanes(struct tegra_dc_sor_data *sor);
+void tegra_dp_disable_tx_pu(struct tegra_dc_sor_data *sor);
+void tegra_dp_set_pe_vs_pc(struct tegra_dc_sor_data *sor, u32 mask,
+ u32 pe_reg, u32 vs_reg, u32 pc_reg, u8 pc_supported);
#endif /*__TEGRA124_SOR_H__ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 09:24:06 +0000