blc.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <commonlib/helpers.h>
#include <northbridge/intel/gm45/gm45.h>
 
/*
 * This contains a list of panel IDs and a known well working
 * backlight PWM frequency.
 */
static const struct blc_pwm_t blc_entries[] = {
        /* Vendor BIOS seems to intend to set PWM freq at 220Hz */
        /* T400 */
        {"B141EW04 V7 ", 110},
        {"B141EW05 V3 ", 450},
        {"LP141WX3-TLR1", 110},
        {"LP141WX5-TLP2", 450},
        {"LTN141AT12401", 450},
        {"LTN141W1-L05", 110},
        {"LTN141WD-L05", 110},
        /* T500 */
        {"LP154W02-TL06", 110},
        {"LTN154P2-L05", 110},
        {"LTN154P3-L02", 110},
        {"LTN154X3-L02", 110},
        {"LTN154U2-L05", 110},
        /* R500 */
        {"154WX5-TLB2", 220},
};
 
int get_blc_values(const struct blc_pwm_t **entries)
{
        *entries = blc_entries;
        return ARRAY_SIZE(blc_entries);
}