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nb/intel/gm45: Make fetching the blc_pwm freq its own function 

Also check the EDID string using strcmp instead of strncmp.

Change-Id: I9ad364f84f3658be98ce7ad3a6f0f0fe3247fc41
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/29924
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
This commit is contained in:
Arthur Heymans 2018-11-29 12:21:12 +01:00 committed by Patrick Georgi
parent ab72fc24be
commit c679b1f333
1 changed files with 36 additions and 25 deletions
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61
src/northbridge/intel/gm45/gma.c
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@ -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