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Commit 1eb22bd3 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu: add read_bios_from_rom callback for CI parts 



Read the vbios image directly from the rom.

Reviewed-by: default avatarJammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarMonk Liu <monk.liu@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 7946b878

drivers/gpu/drm/amd/amdgpu/cik.c

+32 −0
Original line number Diff line number Diff line
@@ -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,