diff options
Diffstat (limited to 'src/soc/intel/baytrail')
| -rw-r--r-- | src/soc/intel/baytrail/chip.h | 1 | ||||
| -rw-r--r-- | src/soc/intel/baytrail/ramstage.c | 13 |
2 files changed, 14 insertions, 0 deletions
diff --git a/src/soc/intel/baytrail/chip.h b/src/soc/intel/baytrail/chip.h index 97b92efb99..ecf1ce3da9 100644 --- a/src/soc/intel/baytrail/chip.h +++ b/src/soc/intel/baytrail/chip.h @@ -88,6 +88,7 @@ struct soc_intel_baytrail_config { uint16_t gpu_pipeb_light_off_delay; uint16_t gpu_pipeb_power_cycle_delay; int gpu_pipeb_pwm_freq_hz; + int disable_ddr_2x_refresh_rate; }; extern struct chip_operations soc_intel_baytrail_ops; diff --git a/src/soc/intel/baytrail/ramstage.c b/src/soc/intel/baytrail/ramstage.c index 6c2de111dc..8b6d93cbe0 100644 --- a/src/soc/intel/baytrail/ramstage.c +++ b/src/soc/intel/baytrail/ramstage.c @@ -38,6 +38,7 @@ #include <soc/pci_devs.h> #include <soc/pmc.h> #include <soc/ramstage.h> +#include <soc/iosf.h> /* Global PATTRS */ DEFINE_PATTRS; @@ -170,12 +171,24 @@ static void s3_resume_prepare(void) s3_save_acpi_wake_source(gnvs); } +static void baytrail_enable_2x_refresh_rate(void) +{ + u32 reg; + reg = iosf_dunit_read(0x8); + reg = reg & ~0x7000; + reg = reg | 0x2000; + iosf_dunit_write(0x8, reg); +} + void baytrail_init_pre_device(struct soc_intel_baytrail_config *config) { struct soc_gpio_config *gpio_config; fill_in_pattrs(); + if (!config->disable_ddr_2x_refresh_rate) + baytrail_enable_2x_refresh_rate(); + /* Allow for SSE instructions to be executed. */ write_cr4(read_cr4() | CR4_OSFXSR | CR4_OSXMMEXCPT); |