diff options
Diffstat (limited to 'src/northbridge/intel/gm45')
| -rw-r--r-- | src/northbridge/intel/gm45/gma.c | 61 |
1 files changed, 36 insertions, 25 deletions
diff --git a/src/northbridge/intel/gm45/gma.c b/src/northbridge/intel/gm45/gma.c index b86e2b3e7e..64b6a571ba 100644 --- a/src/northbridge/intel/gm45/gma.c +++ b/src/northbridge/intel/gm45/gma.c @@ -668,6 +668,39 @@ static u32 freq_to_blc_pwm_ctl(struct device *const dev, return (blc_mod << 16) | blc_mod; } +static u16 get_blc_pwm_freq_value(const char *edid_ascii_string) +{ + static u16 blc_pwm_freq; + const struct blc_pwm_t *blc_pwm; + int i; + int blc_array_len; + + if (blc_pwm_freq > 0) + return blc_pwm_freq; + + blc_array_len = get_blc_values(&blc_pwm); + /* Find EDID string and pwm freq in lookup table */ + for (i = 0; i < blc_array_len; i++) { + if (!strcmp(blc_pwm[i].ascii_string, edid_ascii_string)) { + blc_pwm_freq = blc_pwm[i].pwm_freq; + printk(BIOS_DEBUG, "Found EDID string: %s in lookup table, pwm: %dHz\n", + blc_pwm[i].ascii_string, blc_pwm_freq); + break; + } + } + + if (i == blc_array_len) + printk(BIOS_NOTICE, "Your panels EDID `%s` wasn't found in the" + "lookup table.\n You may have issues with your panels" + "backlight.\n If you want to help improving coreboot" + "please report: this EDID string\n and the result" + "of `intel_read read BLC_PWM_CTL`" + "(from intel-gpu-tools)\n while running vendor BIOS\n", + edid_ascii_string); + + return blc_pwm_freq; +} + static void gma_pm_init_post_vbios(struct device *const dev, const char *edid_ascii_string) { @@ -675,9 +708,7 @@ static void gma_pm_init_post_vbios(struct device *const dev, u32 reg32; u8 reg8; - const struct blc_pwm_t *blc_pwm; - int blc_array_len, i; - u16 pwm_freq = 0; + u16 pwm_freq; /* Setup Panel Power On Delays */ reg32 = gtt_read(PP_ON_DELAYS); @@ -708,30 +739,10 @@ static void gma_pm_init_post_vbios(struct device *const dev, reg8 = 100; if (conf->duty_cycle != 0) reg8 = conf->duty_cycle; - blc_array_len = get_blc_values(&blc_pwm); - if (conf->default_pwm_freq != 0) + pwm_freq = get_blc_pwm_freq_value(edid_ascii_string); + if (pwm_freq == 0 && conf->default_pwm_freq != 0) pwm_freq = conf->default_pwm_freq; - /* Find EDID string and pwm freq in lookup table */ - for (i = 0; i < blc_array_len; i++) { - if (!strncmp(blc_pwm[i].ascii_string, edid_ascii_string, - strlen(blc_pwm[i].ascii_string))) { - pwm_freq = blc_pwm[i].pwm_freq; - printk(BIOS_DEBUG, "Found EDID string: %s in lookup table, pwm: %dHz\n", - blc_pwm[i].ascii_string, pwm_freq); - break; - } - } - - if (i == blc_array_len) - printk(BIOS_NOTICE, "Your panels EDID `%s` wasn't found in the" - "lookup table.\n You may have issues with your panels" - "backlight.\n If you want to help improving coreboot" - "please report: this EDID string\n and the result" - "of `intel_read read BLC_PWM_CTL`" - "(from intel-gpu-tools)\n while running vendor BIOS\n", - edid_ascii_string); - if (pwm_freq == 0) gtt_write(BLC_PWM_CTL, 0x06100610); else |