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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>
This commit is contained in:
Werner Zeh 2016-12-01 10:57:34 +01:00
parent 8f91623db9
commit 0575a4f8ee
1 changed files with 5 additions and 8 deletions
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13
src/mainboard/siemens/mc_tcu3/ptn3460.c
View File

@ -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 */