Commit 9a530062 authored by Aaron Liu's avatar Aaron Liu Committed by Alex Deucher
Browse files

drm/amdgpu: modify system reference clock source for navi+ (V2) 



Starting from Navi+, the rlc reference clock is used for system clock
from vbios gfx_info table. It is incorrect to use core_refclk_10khz of
vbios smu_info table as system clock.

Signed-off-by: default avatarAaron Liu <aaron.liu@amd.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Acked-by: default avatarHuang Rui <ray.huang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 87476d12

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

+15 −0
Original line number Diff line number Diff line
@@ -546,6 +546,21 @@ int amdgpu_atomfirmware_get_clock_info(struct amdgpu_device *adev) 
		ret = 0;

	}



	/* if asic is Navi+, the rlc reference clock is used for system clock

	 * from vbios gfx_info table */

	if (adev->asic_type >= CHIP_NAVI10) {

		index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,

						   gfx_info);

		if (amdgpu_atom_parse_data_header(mode_info->atom_context, index, NULL,

					  &frev, &crev, &data_offset)) {

			struct atom_gfx_info_v2_2 *gfx_info = (struct atom_gfx_info_v2_2*)

				(mode_info->atom_context->bios + data_offset);

			if ((frev == 2) && (crev >= 2))

				spll->reference_freq = le32_to_cpu(gfx_info->rlc_gpu_timer_refclk);

			ret = 0;

		}

	}



	return ret;

}