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mb/lenovo: Support dual graphics for xx20/xx30 ThinkPads

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Add CMOS option that allows to use both integrated and discrete GPU.

Tested on ThinkPad W530.

Change-Id: I8842fef0fa1235eb91abf6b7e655ed4d8598adc7
Signed-off-by: Evgeny Zinoviev <me@ch1p.com>
Reviewed-on: https://review.coreboot.org/28393
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Evgeny Zinoviev
2018-08-30 02:18:48 +03:00
committed by Patrick Georgi
parent ce1af8b0bf
commit 384e9aed8c
15 changed files with 66 additions and 14 deletions
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16
src/drivers/lenovo/hybrid_graphics/romstage.c
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@@ -20,7 +20,6 @@
#include <southbridge/intel/common/gpio.h>
#include <ec/lenovo/pmh7/pmh7.h>
#include <console/console.h>
#include <delay.h>
#include "hybrid_graphics.h"
#include "chip.h"
@@ -87,18 +86,9 @@ void early_hybrid_graphics(bool *enable_igd, bool *enable_peg)
set_gpio(config->dgpu_power_gpio,
config->dgpu_power_off_lvl);
} else if (config->has_thinker1) {
const size_t power_en = !!(pmh7_register_read(0x50) & 0x08);
if (*enable_peg && !power_en) {
pmh7_register_clear_bit(0x50, 7); // DGPU_RST
pmh7_register_set_bit(0x50, 3); // DGPU_PWR
mdelay(10);
pmh7_register_set_bit(0x50, 7); // DGPU_RST
mdelay(50);
} else if (!*enable_peg && power_en) {
pmh7_register_clear_bit(0x50, 7); // DGPU_RST
udelay(100);
pmh7_register_clear_bit(0x50, 3); // DGPU_PWR
}
bool power_en = pmh7_dgpu_power_state();
if (*enable_peg != power_en)
pmh7_dgpu_power_enable(!power_en);
} else {
printk(BIOS_ERR, "Hybrid graphics:"
" FIXME: dGPU power handling not implemented\n");