From 8e079000dc606e4d54d36051173710f4186443c2 Mon Sep 17 00:00:00 2001 From: Arthur Heymans Date: Sat, 14 Jan 2017 22:31:54 +0100 Subject: nb/i945/gma.c: Refactor panel setup MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This reuses some of gm45 code to set up the panel. Panel start and stop delays and pwm frequency can now be set in devicetree. Linux does not make the difference between 945gm and gm45 for panel delays, so it is safe to assume the semantics of those registers are the same. The core display clock is computed according to "Mobile Intel® 945 Express Chipset Family" Datasheet. This selects Legacy backlight mode since most targets have some smm code that rely on this. This sets the same backlight frequency as vendor bios on Thinkpad X60 and T60. A default of 180Hz is selected for the PWM frequency if it is not defined in the devicetree, this might be annoying for displays that are LED backlit, but is a safe value for CCFL backlit displays. Change-Id: I1c47b68eecc19624ee534598c22da183bc89425d Signed-off-by: Arthur Heymans Reviewed-on: https://review.coreboot.org/18141 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel Reviewed-by: Nico Huber --- src/drivers/intel/gma/i915_reg.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/drivers/intel/gma') diff --git a/src/drivers/intel/gma/i915_reg.h b/src/drivers/intel/gma/i915_reg.h index 2ee5748e75..dee6865224 100644 --- a/src/drivers/intel/gma/i915_reg.h +++ b/src/drivers/intel/gma/i915_reg.h @@ -62,7 +62,7 @@ #define GCFGC 0xf0 /* 915+ only */ #define GC_LOW_FREQUENCY_ENABLE (1 << 7) #define GC_DISPLAY_CLOCK_190_200_MHZ (0 << 4) -#define GC_DISPLAY_CLOCK_333_MHZ (4 << 4) +#define GC_DISPLAY_CLOCK_333_320_MHZ (4 << 4) #define GC_DISPLAY_CLOCK_MASK (7 << 4) #define GM45_GC_RENDER_CLOCK_MASK (0xf << 0) #define GM45_GC_RENDER_CLOCK_266_MHZ (8 << 0) -- cgit v1.2.3