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Commit 6d949d24 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu: implement si_read_bios_from_rom 



This allows us to read the vbios image directly from ROM.
This is already implemented for other asics, but was not
yet available for SI.

Acked-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 1a6ec7ed

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

+28 −0
Original line number Diff line number Diff line
@@ -1150,6 +1150,33 @@ static bool si_read_disabled_bios(struct amdgpu_device *adev) 
	return r;

}



#define mmROM_INDEX 0x2A

#define mmROM_DATA  0x2B



static bool si_read_bios_from_rom(struct amdgpu_device *adev,

				  u8 *bios, u32 length_bytes)

{

	u32 *dw_ptr;

	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;

	/* set rom index to 0 */

	WREG32(mmROM_INDEX, 0);

	for (i = 0; i < length_dw; i++)

		dw_ptr[i] = RREG32(mmROM_DATA);



	return true;

}



//xxx: not implemented

static int si_asic_reset(struct amdgpu_device *adev)

{
@@ -1206,6 +1233,7 @@ static void si_detect_hw_virtualization(struct amdgpu_device *adev) 
static const struct amdgpu_asic_funcs si_asic_funcs =

{

	.read_disabled_bios = &si_read_disabled_bios,

	.read_bios_from_rom = &si_read_bios_from_rom,

	.read_register = &si_read_register,

	.reset = &si_asic_reset,

	.set_vga_state = &si_vga_set_state,