mb/google/kahlee: Tune eDP panel initialization time
1. Add two parameters for panel initialization timing.
> lvds_poseq_varybl_to_blon
> lvds_poseq_blon_to_varybl
2. The BL_PWM is controlled by APU_EDP_BKLTEN_L/APU_DP_VARY_BL/
EDP_BKLTEN_L, so move APU_EDP_BKLTEN_L to early init stage,
and be enabled depends on SKU, thus we can control the delay
time by config APU_DP_VARY_BL.
BUG=b:118011567
TEST=emerge-grunt coreboot.
Change-Id: Ib20c48813b208d697b950b2f02a70a690e483fdb
Signed-off-by: Chris Wang <chris.wang@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/29469
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/mainboard/google/kahlee/OemCustomize.c b/src/mainboard/google/kahlee/OemCustomize.c
index a0bd8cd..12e5072 100644
--- a/src/mainboard/google/kahlee/OemCustomize.c
+++ b/src/mainboard/google/kahlee/OemCustomize.c
@@ -16,6 +16,9 @@
#include <chip.h>
#include <amdblocks/agesawrapper.h>
#include <boardid.h>
+#include <gpio.h>
+#include <console/console.h>
+#include <soc/pci_devs.h>
#define DIMMS_PER_CHANNEL 1
#if DIMMS_PER_CHANNEL > MAX_DIMMS_PER_CH
@@ -75,5 +78,28 @@
void set_board_env_params(GNB_ENV_CONFIGURATION *params)
{
+ const struct soc_amd_stoneyridge_config *cfg;
+ const struct device *dev = dev_find_slot(0, GNB_DEVFN);
+ if (!dev || !dev->chip_info) {
+ printk(BIOS_WARNING, "Warning: Cannot find SoC devicetree config\n");
+ return;
+ }
+ cfg = dev->chip_info;
+ if (cfg->lvds_poseq_blon_to_varybl && cfg->lvds_poseq_varybl_to_blon) {
+ /*
+ * GPIO 133 - Backlight enable (active low)
+ * Pass control of the backlight to the video BIOS
+ */
+ gpio_set(GPIO_133, 0);
+ printk(BIOS_INFO, "Change panel init timing\n");
+ params->LvdsPowerOnSeqVaryBlToBlon =
+ cfg->lvds_poseq_varybl_to_blon;
+ params->LvdsPowerOnSeqBlonToVaryBl =
+ cfg->lvds_poseq_blon_to_varybl;
+ printk(BIOS_INFO, "LvdsPowerOnSeqVaryBlToBlon: %dms\n",
+ (params->LvdsPowerOnSeqVaryBlToBlon)*4);
+ printk(BIOS_INFO, "LvdsPowerOnSeqBlonToVaryBl: %dms\n",
+ (params->LvdsPowerOnSeqBlonToVaryBl)*4);
+ }
params->EDPv1_4VSMode = EDP_VS_HIGH_VDIFF_MODE;
}