[AMD Official Use Only - General] Reviewed-by: Huang Rui <ray.huang@xxxxxxx> -----Original Message----- From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Alex Deucher Sent: Wednesday, November 30, 2022 2:17 AM To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx> Subject: [PATCH] drm/amd/display: use the proper fb offset for DM This fixes DMCU initialization in APU GPU passthrough. The DMCU needs the GPU physical address, not the CPU physical address. This ends up working out on bare metal because we always use the physical address, but doesn't work in passthrough because the addresses are different. Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 3792a181253b..850432e220a8 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1096,7 +1096,7 @@ static int dm_dmub_hw_init(struct amdgpu_device *adev) /* Initialize hardware. */ memset(&hw_params, 0, sizeof(hw_params)); hw_params.fb_base = adev->gmc.fb_start; - hw_params.fb_offset = adev->gmc.aper_base; + hw_params.fb_offset = adev->vm_manager.vram_base_offset; /* backdoor load firmware and trigger dmub running */ if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) @@ -1218,7 +1218,7 @@ static void mmhub_read_system_context(struct amdgpu_device *adev, struct dc_phy_ pa_config->system_aperture.agp_top = (uint64_t)agp_top << 24; pa_config->system_aperture.fb_base = adev->gmc.fb_start; - pa_config->system_aperture.fb_offset = adev->gmc.aper_base; + pa_config->system_aperture.fb_offset = +adev->vm_manager.vram_base_offset; pa_config->system_aperture.fb_top = adev->gmc.fb_end; pa_config->gart_config.page_table_start_addr = page_table_start.quad_part << 12; -- 2.38.1
<<attachment: winmail.dat>>
