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amdgpu: detect if we are using atomfirmware or atombios for vbios (v2)

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Supposedly atomfirmware rom header is 3.3 atombios is 1.1.

v2: rebased on newer kernel

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2017-02-13 16:01:58 -05:00
parent 1fadf42ed5
commit 0cdd500560
2 changed files with 24 additions and 7 deletions
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1
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -1308,6 +1308,7 @@ struct amdgpu_device {
bool have_disp_power_ref;
/* BIOS */
bool is_atom_fw;
uint8_t *bios;
uint32_t bios_size;
struct amdgpu_bo *stollen_vga_memory;

30
drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
View File

@ -86,6 +86,18 @@ static bool check_atom_bios(uint8_t *bios, size_t size)
return false;
}
static bool is_atom_fw(uint8_t *bios)
{
uint16_t bios_header_start = bios[0x48] | (bios[0x49] << 8);
uint8_t frev = bios[bios_header_start + 2];
uint8_t crev = bios[bios_header_start + 3];
if ((frev < 3) ||
((frev == 3) && (crev < 3)))
return false;
return true;
}
/* If you boot an IGP board with a discrete card as the primary,
* the IGP rom is not accessible via the rom bar as the IGP rom is
@ -419,26 +431,30 @@ static inline bool amdgpu_acpi_vfct_bios(struct amdgpu_device *adev)
bool amdgpu_get_bios(struct amdgpu_device *adev)
{
if (amdgpu_atrm_get_bios(adev))
return true;
goto success;
if (amdgpu_acpi_vfct_bios(adev))
return true;
goto success;
if (igp_read_bios_from_vram(adev))
return true;
goto success;
if (amdgpu_read_bios(adev))
return true;
goto success;
if (amdgpu_read_bios_from_rom(adev))
return true;
goto success;
if (amdgpu_read_disabled_bios(adev))
return true;
goto success;
if (amdgpu_read_platform_bios(adev))
return true;
goto success;
DRM_ERROR("Unable to locate a BIOS ROM\n");
return false;
success:
adev->is_atom_fw = is_atom_fw(adev->bios);
return true;
}