1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <commonlib/helpers.h>
4 #include <northbridge/intel/gm45/gm45.h>
5
6 /*
7 * This contains a list of panel IDs and a known well working
8 * backlight PWM frequency.
9 */
10 static const struct blc_pwm_t blc_entries[] = {
11 /* Vendor BIOS seems to intend to set PWM freq at 220Hz */
12 /* T400 */
13 {"B141EW04 V7 ", 110},
14 {"B141EW05 V3 ", 450},
15 {"LP141WX3-TLR1", 110},
16 {"LP141WX5-TLP2", 450},
17 {"LTN141AT12401", 450},
18 {"LTN141W1-L05", 110},
19 {"LTN141WD-L05", 110},
20 /* T500 */
21 {"LP154W02-TL06", 110},
22 {"LTN154P2-L05", 110},
23 {"LTN154P3-L02", 110},
24 {"LTN154X3-L02", 110},
25 {"LTN154U2-L05", 110},
26 /* R500 */
27 {"154WX5-TLB2", 220},
28 };
29
get_blc_values(const struct blc_pwm_t ** entries)30 int get_blc_values(const struct blc_pwm_t **entries)
31 {
32 *entries = blc_entries;
33 return ARRAY_SIZE(blc_entries);
34 }
35