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authorWerner Zeh <werner.zeh@siemens.com>2016-12-01 10:57:34 +0100
committerWerner Zeh <werner.zeh@siemens.com>2016-12-06 09:59:21 +0100
commit0575a4f8ee311a04ec2375f683d8efbcbd01396d (patch)
treeb53814eaed069acc91f25028cf2ccd8a8eff55fd /src/mainboard
parent8f91623db98961c4434aa0bdc0195ef848e58975 (diff)
downloadcoreboot-0575a4f8ee311a04ec2375f683d8efbcbd01396d.tar.xz
mc_tcu3: Do not abort initialization of PTN3460 when HW-ID is missing
Do not abort the initialization of PTN3460 if HW-ID could not be retrieved and just assume that the HW-ID does not match 7.9.2.0. In this case PTN3460 will be setup to a working condition even if this field is missing. This makes this driver more robust with faulty blocks. Change-Id: I301fb165a7924768e44182d92be820294beb0280 Signed-off-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-on: https://review.coreboot.org/17671 Tested-by: build bot (Jenkins) Reviewed-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Diffstat (limited to 'src/mainboard')
-rw-r--r--src/mainboard/siemens/mc_tcu3/ptn3460.c13
1 files changed, 5 insertions, 8 deletions
diff --git a/src/mainboard/siemens/mc_tcu3/ptn3460.c b/src/mainboard/siemens/mc_tcu3/ptn3460.c
index cd59492582..347bc9ca37 100644
--- a/src/mainboard/siemens/mc_tcu3/ptn3460.c
+++ b/src/mainboard/siemens/mc_tcu3/ptn3460.c
@@ -58,11 +58,6 @@ int ptn3460_init(char *hwi_block)
hwi_block);
return 1;
}
- if (hwilib_get_field(HWID, hwid, sizeof(hwid)) != sizeof(hwid)) {
- printk(BIOS_ERR, "LCD: Missing HW-ID from %s\n",
- hwi_block);
- return 1;
- }
/* Here, all the desired information for setting up DP2LVDS converter*/
/* are present. Inside the converter, table 6 will be used for */
/* the timings. */
@@ -85,10 +80,12 @@ int ptn3460_init(char *hwi_block)
cfg.lvds_interface_ctrl1 |= 0x20; /* Use 18 bits per pixel */
cfg.lvds_interface_ctrl2 = 0x03; /* no clock spreading, 300 mV LVDS swing */
- if (memcmp(hwid, tcu31_hwid, sizeof(hwid)))
- cfg.lvds_interface_ctrl3 = 0x00; /* no LVDS signal swap */
- else
+ /* Swap LVDS even and odd lanes for HW-ID 7.9.2.0 only. */
+ if (hwilib_get_field(HWID, hwid, sizeof(hwid)) == sizeof(hwid) &&
+ !(memcmp(hwid, tcu31_hwid, sizeof(hwid)))) {
cfg.lvds_interface_ctrl3 = 0x01; /* swap LVDS even and odd */
+ } else
+ cfg.lvds_interface_ctrl3 = 0x00; /* no LVDS signal swap */
cfg.t2_delay = 1; /* Delay T2 (VDD to LVDS active) by 16 ms */
cfg.t3_timing = 10; /* 500 ms from LVDS to backlight active */
cfg.t12_timing = 20; /* 1 second re-power delay */