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drm/amdgpu: add read_bios_from_rom callback for CI parts 

Read the vbios image directly from the rom.

Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
hifive-unleashed-5.1
Alex Deucher 2015-11-24 10:34:45 -05:00
parent 7946b87803
commit 1eb22bd38a
1 changed files with 32 additions and 0 deletions
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32
drivers/gpu/drm/amd/amdgpu/cik.c
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@ -929,6 +929,37 @@ static bool cik_read_disabled_bios(struct amdgpu_device *adev)
return r;
}
static bool cik_read_bios_from_rom(struct amdgpu_device *adev,
u8 *bios, u32 length_bytes)
{
u32 *dw_ptr;
unsigned long flags;
u32 i, length_dw;
if (bios == NULL)
return false;
if (length_bytes == 0)
return false;
/* APU vbios image is part of sbios image */
if (adev->flags & AMD_IS_APU)
return false;
dw_ptr = (u32 *)bios;
length_dw = ALIGN(length_bytes, 4) / 4;
/* take the smc lock since we are using the smc index */
spin_lock_irqsave(&adev->smc_idx_lock, flags);
/* set rom index to 0 */
WREG32(mmSMC_IND_INDEX_0, ixROM_INDEX);
WREG32(mmSMC_IND_DATA_0, 0);
/* set index to data for continous read */
WREG32(mmSMC_IND_INDEX_0, ixROM_DATA);
for (i = 0; i < length_dw; i++)
dw_ptr[i] = RREG32(mmSMC_IND_DATA_0);
spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
return true;
}
static struct amdgpu_allowed_register_entry cik_allowed_read_registers[] = {
{mmGRBM_STATUS, false},
{mmGB_ADDR_CONFIG, false},
@ -2267,6 +2298,7 @@ int cik_set_ip_blocks(struct amdgpu_device *adev)
static const struct amdgpu_asic_funcs cik_asic_funcs =
{
.read_disabled_bios = &cik_read_disabled_bios,
.read_bios_from_rom = &cik_read_bios_from_rom,
.read_register = &cik_read_register,
.reset = &cik_asic_reset,
.set_vga_state = &cik_vga_set_state,