From 1ce65f5284d6018916dd4a86865d0ce5f11d24b9 Mon Sep 17 00:00:00 2001 From: Harry Wentland Date: Fri, 31 Mar 2017 20:14:33 -0400 Subject: [PATCH] drm/amdgpu: Read vram width from integrated system info table On KB, KV, CZ we should read the vram width from integrated system table, if we can. The NOOFCHAN in MC_SHARED_CHMAP is not accurate. With this change we can enable two 4k displays on CZ again. This use case was broken sometime in January when we started looking at vram_width for bandwidth calculations instead of hardcoding this value. v2: Return 0 if integrated system info table is not available. Tested-by: Roman Li Signed-off-by: Harry Wentland Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c | 29 +++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h | 2 + drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 87 +++++++++++--------- drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c | 87 +++++++++++--------- 4 files changed, 123 insertions(+), 82 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c index f52b1bf3d3d9..ad4329922f79 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c @@ -754,6 +754,35 @@ union igp_info { struct _ATOM_INTEGRATED_SYSTEM_INFO_V1_9 info_9; }; +/* + * Return vram width from integrated system info table, if available, + * or 0 if not. + */ +int amdgpu_atombios_get_vram_width(struct amdgpu_device *adev) +{ + struct amdgpu_mode_info *mode_info = &adev->mode_info; + int index = GetIndexIntoMasterTable(DATA, IntegratedSystemInfo); + u16 data_offset, size; + union igp_info *igp_info; + u8 frev, crev; + + /* get any igp specific overrides */ + if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, &size, + &frev, &crev, &data_offset)) { + igp_info = (union igp_info *) + (mode_info->atom_context->bios + data_offset); + switch (crev) { + case 8: + case 9: + return igp_info->info_8.ucUMAChannelNumber * 64; + default: + return 0; + } + } + + return 0; +} + static void amdgpu_atombios_get_igp_ss_overrides(struct amdgpu_device *adev, struct amdgpu_atom_ss *ss, int id) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h index 4e0f488487f3..38d0fe32e5cd 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.h @@ -148,6 +148,8 @@ int amdgpu_atombios_get_clock_info(struct amdgpu_device *adev); int amdgpu_atombios_get_gfx_info(struct amdgpu_device *adev); +int amdgpu_atombios_get_vram_width(struct amdgpu_device *adev); + bool amdgpu_atombios_get_asic_ss_info(struct amdgpu_device *adev, struct amdgpu_atom_ss *ss, int id, u32 clock); diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c index 0c0a6015cca5..78643a1baa5c 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c @@ -37,6 +37,8 @@ #include "oss/oss_2_0_d.h" #include "oss/oss_2_0_sh_mask.h" +#include "amdgpu_atombios.h" + static void gmc_v7_0_set_gart_funcs(struct amdgpu_device *adev); static void gmc_v7_0_set_irq_funcs(struct amdgpu_device *adev); static int gmc_v7_0_wait_for_idle(void *handle); @@ -325,48 +327,51 @@ static void gmc_v7_0_mc_program(struct amdgpu_device *adev) */ static int gmc_v7_0_mc_init(struct amdgpu_device *adev) { - u32 tmp; - int chansize, numchan; - - /* Get VRAM informations */ - tmp = RREG32(mmMC_ARB_RAMCFG); - if (REG_GET_FIELD(tmp, MC_ARB_RAMCFG, CHANSIZE)) { - chansize = 64; - } else { - chansize = 32; - } - tmp = RREG32(mmMC_SHARED_CHMAP); - switch (REG_GET_FIELD(tmp, MC_SHARED_CHMAP, NOOFCHAN)) { - case 0: - default: - numchan = 1; - break; - case 1: - numchan = 2; - break; - case 2: - numchan = 4; - break; - case 3: - numchan = 8; - break; - case 4: - numchan = 3; - break; - case 5: - numchan = 6; - break; - case 6: - numchan = 10; - break; - case 7: - numchan = 12; - break; - case 8: - numchan = 16; - break; + adev->mc.vram_width = amdgpu_atombios_get_vram_width(adev); + if (!adev->mc.vram_width) { + u32 tmp; + int chansize, numchan; + + /* Get VRAM informations */ + tmp = RREG32(mmMC_ARB_RAMCFG); + if (REG_GET_FIELD(tmp, MC_ARB_RAMCFG, CHANSIZE)) { + chansize = 64; + } else { + chansize = 32; + } + tmp = RREG32(mmMC_SHARED_CHMAP); + switch (REG_GET_FIELD(tmp, MC_SHARED_CHMAP, NOOFCHAN)) { + case 0: + default: + numchan = 1; + break; + case 1: + numchan = 2; + break; + case 2: + numchan = 4; + break; + case 3: + numchan = 8; + break; + case 4: + numchan = 3; + break; + case 5: + numchan = 6; + break; + case 6: + numchan = 10; + break; + case 7: + numchan = 12; + break; + case 8: + numchan = 16; + break; + } + adev->mc.vram_width = numchan * chansize; } - adev->mc.vram_width = numchan * chansize; /* Could aper size report 0 ? */ adev->mc.aper_base = pci_resource_start(adev->pdev, 0); adev->mc.aper_size = pci_resource_len(adev->pdev, 0); diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c index d19d1c5e2847..42b2f357a799 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c @@ -38,6 +38,8 @@ #include "vid.h" #include "vi.h" +#include "amdgpu_atombios.h" + static void gmc_v8_0_set_gart_funcs(struct amdgpu_device *adev); static void gmc_v8_0_set_irq_funcs(struct amdgpu_device *adev); @@ -487,48 +489,51 @@ static void gmc_v8_0_mc_program(struct amdgpu_device *adev) */ static int gmc_v8_0_mc_init(struct amdgpu_device *adev) { - u32 tmp; - int chansize, numchan; - - /* Get VRAM informations */ - tmp = RREG32(mmMC_ARB_RAMCFG); - if (REG_GET_FIELD(tmp, MC_ARB_RAMCFG, CHANSIZE)) { - chansize = 64; - } else { - chansize = 32; - } - tmp = RREG32(mmMC_SHARED_CHMAP); - switch (REG_GET_FIELD(tmp, MC_SHARED_CHMAP, NOOFCHAN)) { - case 0: - default: - numchan = 1; - break; - case 1: - numchan = 2; - break; - case 2: - numchan = 4; - break; - case 3: - numchan = 8; - break; - case 4: - numchan = 3; - break; - case 5: - numchan = 6; - break; - case 6: - numchan = 10; - break; - case 7: - numchan = 12; - break; - case 8: - numchan = 16; - break; + adev->mc.vram_width = amdgpu_atombios_get_vram_width(adev); + if (!adev->mc.vram_width) { + u32 tmp; + int chansize, numchan; + + /* Get VRAM informations */ + tmp = RREG32(mmMC_ARB_RAMCFG); + if (REG_GET_FIELD(tmp, MC_ARB_RAMCFG, CHANSIZE)) { + chansize = 64; + } else { + chansize = 32; + } + tmp = RREG32(mmMC_SHARED_CHMAP); + switch (REG_GET_FIELD(tmp, MC_SHARED_CHMAP, NOOFCHAN)) { + case 0: + default: + numchan = 1; + break; + case 1: + numchan = 2; + break; + case 2: + numchan = 4; + break; + case 3: + numchan = 8; + break; + case 4: + numchan = 3; + break; + case 5: + numchan = 6; + break; + case 6: + numchan = 10; + break; + case 7: + numchan = 12; + break; + case 8: + numchan = 16; + break; + } + adev->mc.vram_width = numchan * chansize; } - adev->mc.vram_width = numchan * chansize; /* Could aper size report 0 ? */ adev->mc.aper_base = pci_resource_start(adev->pdev, 0); adev->mc.aper_size = pci_resource_len(adev->pdev, 0); -- 2.20.1