From b0a2db9b482f16a91b2d67bac6b4977dc471fcab Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 19 Aug 2020 16:48:17 -0400 Subject: [PATCH] drm/amdgpu: add pre_asic_init callback for SOC15 We need to restore some registers prior to running asic init to work around a firmware bug. Acked-by: Nirmoy Das Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 35 +++++++++++++-------------- drivers/gpu/drm/amd/amdgpu/gmc_v9_0.h | 2 ++ drivers/gpu/drm/amd/amdgpu/soc15.c | 7 ++++++ 3 files changed, 26 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c index a858912eb094..1ca79030e95e 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c @@ -1075,6 +1075,20 @@ static int gmc_v9_0_gart_init(struct amdgpu_device *adev) return amdgpu_gart_table_vram_alloc(adev); } +/** + * gmc_v9_0_save_registers - saves regs + * + * @adev: amdgpu_device pointer + * + * This saves potential register values that should be + * restored upon resume + */ +static void gmc_v9_0_save_registers(struct amdgpu_device *adev) +{ + if (adev->asic_type == CHIP_RAVEN) + adev->gmc.sdpif_register = RREG32_SOC15(DCE, 0, mmDCHUBBUB_SDPIF_MMIO_CNTRL_0); +} + static int gmc_v9_0_sw_init(void *handle) { int r, vram_width = 0, vram_type = 0, vram_vendor = 0; @@ -1229,6 +1243,8 @@ static int gmc_v9_0_sw_init(void *handle) amdgpu_vm_manager_init(adev); + gmc_v9_0_save_registers(adev); + return 0; } @@ -1282,7 +1298,7 @@ static void gmc_v9_0_init_golden_registers(struct amdgpu_device *adev) * * This restores register values, saved at suspend. */ -static void gmc_v9_0_restore_registers(struct amdgpu_device *adev) +void gmc_v9_0_restore_registers(struct amdgpu_device *adev) { if (adev->asic_type == CHIP_RAVEN) WREG32_SOC15(DCE, 0, mmDCHUBBUB_SDPIF_MMIO_CNTRL_0, adev->gmc.sdpif_register); @@ -1386,20 +1402,6 @@ static int gmc_v9_0_hw_init(void *handle) return r; } -/** - * gmc_v9_0_save_registers - saves regs - * - * @adev: amdgpu_device pointer - * - * This saves potential register values that should be - * restored upon resume - */ -static void gmc_v9_0_save_registers(struct amdgpu_device *adev) -{ - if (adev->asic_type == CHIP_RAVEN) - adev->gmc.sdpif_register = RREG32_SOC15(DCE, 0, mmDCHUBBUB_SDPIF_MMIO_CNTRL_0); -} - /** * gmc_v9_0_gart_disable - gart disable * @@ -1440,8 +1442,6 @@ static int gmc_v9_0_suspend(void *handle) if (r) return r; - gmc_v9_0_save_registers(adev); - return 0; } @@ -1450,7 +1450,6 @@ static int gmc_v9_0_resume(void *handle) int r; struct amdgpu_device *adev = (struct amdgpu_device *)handle; - gmc_v9_0_restore_registers(adev); r = gmc_v9_0_hw_init(adev); if (r) return r; diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.h b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.h index e0585e8c6c1b..c415c439f690 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.h +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.h @@ -26,4 +26,6 @@ extern const struct amd_ip_funcs gmc_v9_0_ip_funcs; extern const struct amdgpu_ip_block_version gmc_v9_0_ip_block; + +void gmc_v9_0_restore_registers(struct amdgpu_device *adev); #endif diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c index 3c3a7adad024..2f93c475d6d8 100644 --- a/drivers/gpu/drm/amd/amdgpu/soc15.c +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c @@ -1029,6 +1029,11 @@ static uint64_t soc15_get_pcie_replay_count(struct amdgpu_device *adev) return (nak_r + nak_g); } +static void soc15_pre_asic_init(struct amdgpu_device *adev) +{ + gmc_v9_0_restore_registers(adev); +} + static const struct amdgpu_asic_funcs soc15_asic_funcs = { .read_disabled_bios = &soc15_read_disabled_bios, @@ -1049,6 +1054,7 @@ static const struct amdgpu_asic_funcs soc15_asic_funcs = .need_reset_on_init = &soc15_need_reset_on_init, .get_pcie_replay_count = &soc15_get_pcie_replay_count, .supports_baco = &soc15_supports_baco, + .pre_asic_init = &soc15_pre_asic_init, }; static const struct amdgpu_asic_funcs vega20_asic_funcs = @@ -1072,6 +1078,7 @@ static const struct amdgpu_asic_funcs vega20_asic_funcs = .need_reset_on_init = &soc15_need_reset_on_init, .get_pcie_replay_count = &soc15_get_pcie_replay_count, .supports_baco = &soc15_supports_baco, + .pre_asic_init = &soc15_pre_asic_init, }; static int soc15_common_early_init(void *handle)