LPDDR5 channels are 32 bit rather than 64, report the width properly in the log. v2: Only LPDDR5 are 32 bits per channel. DDR5 is 64 bits per channel Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2468 Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> --- .../gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c index ef4b9a41f20a..0b7f4c4d58e5 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c @@ -327,10 +327,13 @@ amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev, mem_channel_number = igp_info->v11.umachannelnumber; if (!mem_channel_number) mem_channel_number = 1; - /* channel width is 64 */ - if (vram_width) - *vram_width = mem_channel_number * 64; mem_type = igp_info->v11.memorytype; + if (mem_type == LpDdr5MemType) + mem_channel_width = 32; + else + mem_channel_width = 64; + if (vram_width) + *vram_width = mem_channel_number * mem_channel_width; if (vram_type) *vram_type = convert_atom_mem_type_to_vram_type(adev, mem_type); break; @@ -345,10 +348,13 @@ amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev, mem_channel_number = igp_info->v21.umachannelnumber; if (!mem_channel_number) mem_channel_number = 1; - /* channel width is 64 */ - if (vram_width) - *vram_width = mem_channel_number * 64; mem_type = igp_info->v21.memorytype; + if (mem_type == LpDdr5MemType) + mem_channel_width = 32; + else + mem_channel_width = 64; + if (vram_width) + *vram_width = mem_channel_number * mem_channel_width; if (vram_type) *vram_type = convert_atom_mem_type_to_vram_type(adev, mem_type); break; -- 2.40.1
