diff options
Diffstat (limited to 'board/gdsys/common/dp501.c')
| -rw-r--r-- | board/gdsys/common/dp501.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/board/gdsys/common/dp501.c b/board/gdsys/common/dp501.c index 7eb15ed0ba..d35aee0879 100644 --- a/board/gdsys/common/dp501.c +++ b/board/gdsys/common/dp501.c @@ -40,11 +40,29 @@ static int dp501_detect_cable_adapter(u8 addr) static void dp501_link_training(u8 addr) { u8 val; + u8 link_bw; + u8 max_lane_cnt; + u8 lane_cnt; val = i2c_reg_read(addr, 0x51); - i2c_reg_write(addr, 0x5d, val); /* set link_bw */ + if (val >= 0x0a) + link_bw = 0x0a; + else + link_bw = 0x06; + if (link_bw != val) + printf("DP sink supports %d Mbps link rate, set to %d Mbps\n", + val * 270, link_bw * 270); + i2c_reg_write(addr, 0x5d, link_bw); /* set link_bw */ val = i2c_reg_read(addr, 0x52); - i2c_reg_write(addr, 0x5e, val); /* set lane_cnt */ + max_lane_cnt = val & 0x1f; + if (max_lane_cnt >= 4) + lane_cnt = 4; + else + lane_cnt = max_lane_cnt; + if (lane_cnt != max_lane_cnt) + printf("DP sink supports %d lanes, set to %d lanes\n", + max_lane_cnt, lane_cnt); + i2c_reg_write(addr, 0x5e, lane_cnt | (val & 0x80)); /* set lane_cnt */ val = i2c_reg_read(addr, 0x53); i2c_reg_write(addr, 0x5c, val); /* set downspread_ctl */ @@ -77,6 +95,8 @@ void dp501_powerup(u8 addr) i2c_reg_write(addr + 2, 0x24, 0x02); /* clock input single ended */ #endif + i2c_reg_write(addr + 2, 0x1a, 0x04); /* SPDIF input method TTL */ + i2c_reg_write(addr + 2, 0x00, 0x18); /* driving strength */ i2c_reg_write(addr + 2, 0x03, 0x06); /* driving strength */ i2c_reg_write(addr, 0x2c, 0x00); /* configure N value */ @@ -86,7 +106,8 @@ void dp501_powerup(u8 addr) dp501_setbits(addr, 0x78, 0x03); /* clear all interrupt */ i2c_reg_write(addr, 0x75, 0xf8); /* aux channel reset */ i2c_reg_write(addr, 0x75, 0x00); /* clear aux channel reset */ - i2c_reg_write(addr, 0x87, 0x70); /* set retry counter as 7 */ + i2c_reg_write(addr, 0x87, 0x7f); /* set retry counter as 7 + retry interval 400us */ if (dp501_detect_cable_adapter(addr)) { printf("DVI/HDMI cable adapter detected\n"); |