From 07e206a6466197487f9f877ee6f5e7a7bec751a2 Mon Sep 17 00:00:00 2001 From: Nico Huber Date: Wed, 19 Oct 2016 15:20:17 +0200 Subject: [PATCH] nb/intel/sandybridge/gma: Always initialize DP buffer translation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit These settings should be always made by the firmware, no matter if we set up graphics or not. It looks like Linux doesn't even know these registers. The values are taken from the PRMs for Sandy Bridge and Ivy Bridge [1, 2]. They match the settings that were done in the native graphics path for Ivy Bridge. I expect the differences to be an update (i.e. the set- tings we did on the Sandy Bridge path were just outdated). Also, these settings affect the PCH and not the CPU which are independent from each other. [1] Intel® OpenSource HD Graphics Programmer’s Reference Manual (PRM) Volume 3 Part 3: PCH Display Registers (SandyBridge) Doc Ref #: IHD-OS-V3 Pt3 – 05 11 https://01.org/sites/default/files/documentation/snb_ihd_os_vol3_part3.pdf [2] Intel ® OpenSource HD Graphics Programmer’s Reference Manual (PRM) Volume 3 Part 4: South Display Engine Registers (Ivy Bridge) Doc Ref #: IHD-OS-V3 Pt 4 – 05 12 https://01.org/sites/default/files/documentation/ivb_ihd_os_vol3_part4.pdf Change-Id: I83cc90c7558b93273a727f332fb0d8ced47ed70e Signed-off-by: Nico Huber Reviewed-on: https://review.coreboot.org/17073 Tested-by: build bot (Jenkins) Reviewed-by: Arthur Heymans Reviewed-by: Paul Menzel --- src/northbridge/intel/sandybridge/gma.c | 12 +++++++++++ .../intel/sandybridge/gma_ivybridge_lvds.c | 20 ------------------- .../intel/sandybridge/gma_sandybridge_lvds.c | 10 ---------- 3 files changed, 12 insertions(+), 30 deletions(-) diff --git a/src/northbridge/intel/sandybridge/gma.c b/src/northbridge/intel/sandybridge/gma.c index bd0de4a6d4..1f5251144b 100644 --- a/src/northbridge/intel/sandybridge/gma.c +++ b/src/northbridge/intel/sandybridge/gma.c @@ -494,6 +494,18 @@ static void gma_pm_init_pre_vbios(struct device *dev) reg32 = gtt_read(0x6c024); reg32 &= ~0x000001c0; gtt_write(0x6c024, reg32); + + /* Initialize DP buffer translation with recommended defaults */ + gtt_write(0xe4f00, 0x0100030c); + gtt_write(0xe4f04, 0x00b8230c); + gtt_write(0xe4f08, 0x06f8930c); + gtt_write(0xe4f0c, 0x05f8e38e); + gtt_write(0xe4f10, 0x00b8030c); + gtt_write(0xe4f14, 0x0b78830c); + gtt_write(0xe4f18, 0x09f8d3cf); + gtt_write(0xe4f1c, 0x01e8030c); + gtt_write(0xe4f20, 0x09f863cf); + gtt_write(0xe4f24, 0x0ff803cf); } static void gma_pm_init_post_vbios(struct device *dev) diff --git a/src/northbridge/intel/sandybridge/gma_ivybridge_lvds.c b/src/northbridge/intel/sandybridge/gma_ivybridge_lvds.c index 32becc1983..489dbc79ad 100644 --- a/src/northbridge/intel/sandybridge/gma_ivybridge_lvds.c +++ b/src/northbridge/intel/sandybridge/gma_ivybridge_lvds.c @@ -76,16 +76,6 @@ static void enable_port(u8 *mmio) write32(mmio + 0xf2060, 0x10); write32(mmio + 0x9840, 0x0); write32(mmio + 0x42000, 0xa0000000); - write32(mmio + 0xe4f00, 0x100030c); - write32(mmio + 0xe4f04, 0xb8230c); - write32(mmio + 0xe4f08, 0x6f8930c); - write32(mmio + 0xe4f0c, 0x5f8e38e); - write32(mmio + 0xe4f10, 0xb8030c); - write32(mmio + 0xe4f14, 0xb78830c); - write32(mmio + 0xe4f18, 0x9f8d3cf); - write32(mmio + 0xe4f1c, 0x1e8030c); - write32(mmio + 0xe4f20, 0x9f863cf); - write32(mmio + 0xe4f24, 0xff803cf); read32(mmio + 0xe4100); write32(mmio + 0xc4030, 0x10); write32(mmio + 0xe4110, 0x8004003e); @@ -115,16 +105,6 @@ static void enable_port(u8 *mmio) read32(mmio + 0xe1140); write32(mmio + 0xc4030, 0x10); read32(mmio + 0xc4000); - write32(mmio + 0xe4f00, 0x100030c); - write32(mmio + 0xe4f04, 0xb8230c); - write32(mmio + 0xe4f08, 0x6f8930c); - write32(mmio + 0xe4f0c, 0x5f8e38e); - write32(mmio + 0xe4f10, 0xb8030c); - write32(mmio + 0xe4f14, 0xb78830c); - write32(mmio + 0xe4f18, 0x9f8d3cf); - write32(mmio + 0xe4f1c, 0x1e8030c); - write32(mmio + 0xe4f20, 0x9f863cf); - write32(mmio + 0xe4f24, 0xff803cf); read32(mmio + 0xe4200); write32(mmio + 0xc4030, 0x1010); write32(mmio + 0xe4210, 0x8004003e); diff --git a/src/northbridge/intel/sandybridge/gma_sandybridge_lvds.c b/src/northbridge/intel/sandybridge/gma_sandybridge_lvds.c index 756f7bf4f2..df1e8a8241 100644 --- a/src/northbridge/intel/sandybridge/gma_sandybridge_lvds.c +++ b/src/northbridge/intel/sandybridge/gma_sandybridge_lvds.c @@ -94,16 +94,6 @@ static void power_port(u8 *mmio) read32(mmio + 0x000e4210); // = 0x5144003e read32(mmio + 0x000e4210); // = 0x5144003e write32(mmio + 0x000e4210, 0x5344003e); - write32(mmio + 0x000e4f00, 0x0100030c); - write32(mmio + 0x000e4f04, 0x00b8230c); - write32(mmio + 0x000e4f08, 0x06f8930c); - write32(mmio + 0x000e4f0c, 0x09f8e38e); - write32(mmio + 0x000e4f10, 0x00b8030c); - write32(mmio + 0x000e4f14, 0x0b78830c); - write32(mmio + 0x000e4f18, 0x0ff8d3cf); - write32(mmio + 0x000e4f1c, 0x01e8030c); - write32(mmio + 0x000e4f20, 0x0ff863cf); - write32(mmio + 0x000e4f24, 0x0ff803cf); write32(mmio + 0x000c4030, 0x00001000); read32(mmio + 0x000c4000); // = 0x00000000 write32(mmio + 0x000c4030, 0x00001000);