Arthur Heymans (arthur@aheymans.xyz) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/16354
-gerrit
commit 4801c13515ec004c32e35effe43ed6b8247a02b0 Author: Arthur Heymans arthur@aheymans.xyz Date: Tue Aug 30 13:42:33 2016 +0200
[UNTESTED] lenovo/T400: correct GPIO for hybrid driver
Currently the hybrid driver uses GPIO 52 to configure mux. This is not the right GPIO on the T400 according to the schematics "MALIBU-3 EXT". It should be GPIO22.
The polarities on the gpio's are also set differently on Lenovo T400. On the Lenovo T400 HIGH on GPIO22 means enable.
Previously also gpio 49 (GFX_PWR_EN), 19 (BKLT_CTRL_SEL), 17 (DGFX_PWRGD) were configured for hybrid graphics to work on T400, but this was reverted in 14d1a93e: "Revert mainboard/lenovo/t400: Add initial hybrid graphics support". This patch sets those gpios correctly again for the Lenovo T400.
Change-Id: I3167303abeb6b3711d53508c61a340d03b1e050a Signed-off-by: Arthur Heymans arthur@aheymans.xyz --- src/drivers/lenovo/Kconfig | 5 +++++ src/drivers/lenovo/hybrid_graphics.c | 24 ++++++++++++++++++++++-- src/mainboard/lenovo/t400/Kconfig | 20 ++++++++++++++++++++ 3 files changed, 47 insertions(+), 2 deletions(-)
diff --git a/src/drivers/lenovo/Kconfig b/src/drivers/lenovo/Kconfig index 38b86da..4c62de1 100644 --- a/src/drivers/lenovo/Kconfig +++ b/src/drivers/lenovo/Kconfig @@ -39,3 +39,8 @@ config HYBRID_GRAPHICS_GPIO_NUM help Set a default GPIO that sets the panel LVDS signal routing to integrated or discrete GPU. + +config ENABLE_DISCRETE_IS_HIGH + depends on DRIVERS_LENOVO_HYBRID_GRAPHICS + bool + default n diff --git a/src/drivers/lenovo/hybrid_graphics.c b/src/drivers/lenovo/hybrid_graphics.c index 9b46646..f5153f1 100644 --- a/src/drivers/lenovo/hybrid_graphics.c +++ b/src/drivers/lenovo/hybrid_graphics.c @@ -43,9 +43,21 @@ static void hybrid_graphics_disable_peg(struct device *dev) { struct device *peg_dev; + u8 disable_lvl = CONFIG_ENABLE_DISCRETE_IS_HIGH ? + GPIO_LEVEL_LOW : GPIO_LEVEL_HIGH;
/* connect LVDS interface to iGPU */ - set_gpio(CONFIG_HYBRID_GRAPHICS_GPIO_NUM, GPIO_LEVEL_HIGH); + set_gpio(CONFIG_HYBRID_GRAPHICS_GPIO_NUM, disable_lvl); + /* configure BKLT_CTL */ + if (CONFIG_BKLT_CTRL_SEL_GPIO) + set_gpio(CONFIG_BKLT_CTRL_SEL_GPIO, disable_lvl); + /* configure DGFX_PWRGD */ + if (CONFIG_DGFX_PWRGD_GPIO) + set_gpio(CONFIG_DGFX_PWRGD_GPIO, disable_lvl); + /* configure GFX_PWR_EN_GPIO */ + if (CONFIG_GFX_PWR_EN_GPIO) + set_gpio(CONFIG_GFX_PWR_EN_GPIO, disable_lvl); + printk(BIOS_DEBUG, "Hybrid graphics: Switching panel to integrated GPU.\n"); dev->enabled = 0;
@@ -62,13 +74,21 @@ static void hybrid_graphics_disable_peg(struct device *dev) static void hybrid_graphics_enable_peg(struct device *dev) { u8 hybrid_graphics_mode; + u8 enable_lvl = CONFIG_ENABLE_DISCRETE_IS_HIGH ? + GPIO_LEVEL_HIGH : GPIO_LEVEL_LOW;
hybrid_graphics_mode = HYBRID_GRAPHICS_INTEGRATED; get_option(&hybrid_graphics_mode, "hybrid_graphics_mode");
if (hybrid_graphics_mode == HYBRID_GRAPHICS_DISCRETE) { /* connect LVDS interface to dGPU */ - set_gpio(CONFIG_HYBRID_GRAPHICS_GPIO_NUM, GPIO_LEVEL_LOW); + set_gpio(CONFIG_HYBRID_GRAPHICS_GPIO_NUM, enable_lvl); + if (CONFIG_BKLT_CTRL_SEL_GPIO) + set_gpio(CONFIG_BKLT_CTRL_SEL_GPIO, enable_lvl); + if (CONFIG_DGFX_PWRGD_GPIO) + set_gpio(CONFIG_DGFX_PWRGD_GPIO, enable_lvl); + if (CONFIG_GFX_PWR_EN_GPIO) + set_gpio(CONFIG_GFX_PWR_EN_GPIO, enable_lvl); printk(BIOS_DEBUG, "Hybrid graphics: Switching panel to discrete GPU.\n"); dev->enabled = 1;
diff --git a/src/mainboard/lenovo/t400/Kconfig b/src/mainboard/lenovo/t400/Kconfig index a444bf8..2fbe403 100644 --- a/src/mainboard/lenovo/t400/Kconfig +++ b/src/mainboard/lenovo/t400/Kconfig @@ -56,4 +56,24 @@ config ONBOARD_VGA_IS_PRIMARY bool default y
+config HYBRID_GRAPHICS_GPIO_NUM + int + default 22 + +config BKLT_CTRL_SEL_GPIO + int + default 19 + +config DGFX_PWRGD_GPIO + int + default 17 + +config GFX_PWR_EN_GPIO + int + default 49 + +config ENABLE_DISCRETE_IS_HIGH + bool + default y + endif # BOARD_LENOVO_T400