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Subject: Re: [PATCH v4 24/27] drm/amd/display: Load DMUB microcode during early_init

On 1/3/23 17:18, Mario Limonciello wrote:
> If DMUB is required for an ASIC, ensure that the microcode is available
> and validates during early_init.
>
> Any failures will cause the driver to fail to probe before the firmware
> framebuffer has been removed.
>
> Signed-off-by: Mario Limonciello <[email protected]>

In addition to changing the FW load order this also changes
request_firmware_direct to request_firmware but this seems to
be the correct thing here anyways, since DMUB is not optional.

Reviewed-by: Harry Wentland <[email protected]>

Harry

> ---
> v3->v4:
> * New patch
> ---
> .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 89 ++++++++++++-------
> 1 file changed, 58 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 4829b5431e4c..eeccc8af0320 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -1945,7 +1945,6 @@ static int dm_dmub_sw_init(struct amdgpu_device *adev)
> struct dmub_srv_fb_info *fb_info;
> struct dmub_srv *dmub_srv;
> const struct dmcub_firmware_header_v1_0 *hdr;
> - const char *fw_name_dmub;
> enum dmub_asic dmub_asic;
> enum dmub_status status;
> int r;
> @@ -1953,73 +1952,46 @@ static int dm_dmub_sw_init(struct amdgpu_device *adev)
> switch (adev->ip_versions[DCE_HWIP][0]) {
> case IP_VERSION(2, 1, 0):
> dmub_asic = DMUB_ASIC_DCN21;
> - fw_name_dmub = FIRMWARE_RENOIR_DMUB;
> - if (ASICREV_IS_GREEN_SARDINE(adev->external_rev_id))
> - fw_name_dmub = FIRMWARE_GREEN_SARDINE_DMUB;
> break;
> case IP_VERSION(3, 0, 0):
> - if (adev->ip_versions[GC_HWIP][0] == IP_VERSION(10, 3, 0)) {
> + if (adev->ip_versions[GC_HWIP][0] == IP_VERSION(10, 3, 0))
> dmub_asic = DMUB_ASIC_DCN30;
> - fw_name_dmub = FIRMWARE_SIENNA_CICHLID_DMUB;
> - } else {
> + else
> dmub_asic = DMUB_ASIC_DCN30;
> - fw_name_dmub = FIRMWARE_NAVY_FLOUNDER_DMUB;
> - }
> break;
> case IP_VERSION(3, 0, 1):
> dmub_asic = DMUB_ASIC_DCN301;
> - fw_name_dmub = FIRMWARE_VANGOGH_DMUB;
> break;
> case IP_VERSION(3, 0, 2):
> dmub_asic = DMUB_ASIC_DCN302;
> - fw_name_dmub = FIRMWARE_DIMGREY_CAVEFISH_DMUB;
> break;
> case IP_VERSION(3, 0, 3):
> dmub_asic = DMUB_ASIC_DCN303;
> - fw_name_dmub = FIRMWARE_BEIGE_GOBY_DMUB;
> break;
> case IP_VERSION(3, 1, 2):
> case IP_VERSION(3, 1, 3):
> dmub_asic = (adev->external_rev_id == YELLOW_CARP_B0) ? DMUB_ASIC_DCN31B : DMUB_ASIC_DCN31;
> - fw_name_dmub = FIRMWARE_YELLOW_CARP_DMUB;
> break;
> case IP_VERSION(3, 1, 4):
> dmub_asic = DMUB_ASIC_DCN314;
> - fw_name_dmub = FIRMWARE_DCN_314_DMUB;
> break;
> case IP_VERSION(3, 1, 5):
> dmub_asic = DMUB_ASIC_DCN315;
> - fw_name_dmub = FIRMWARE_DCN_315_DMUB;
> break;
> case IP_VERSION(3, 1, 6):
> dmub_asic = DMUB_ASIC_DCN316;
> - fw_name_dmub = FIRMWARE_DCN316_DMUB;
> break;
> case IP_VERSION(3, 2, 0):
> dmub_asic = DMUB_ASIC_DCN32;
> - fw_name_dmub = FIRMWARE_DCN_V3_2_0_DMCUB;
> break;
> case IP_VERSION(3, 2, 1):
> dmub_asic = DMUB_ASIC_DCN321;
> - fw_name_dmub = FIRMWARE_DCN_V3_2_1_DMCUB;
> break;
> default:
> /* ASIC doesn't support DMUB. */
> return 0;
> }
>
> - r = request_firmware_direct(&adev->dm.dmub_fw, fw_name_dmub, adev->dev);
> - if (r) {
> - DRM_ERROR("DMUB firmware loading failed: %d\n", r);
> - return 0;
> - }
> -
> - r = amdgpu_ucode_validate(adev->dm.dmub_fw);
> - if (r) {
> - DRM_ERROR("Couldn't validate DMUB firmware: %d\n", r);
> - return 0;
> - }
> -
> hdr = (const struct dmcub_firmware_header_v1_0 *)adev->dm.dmub_fw->data;
> adev->dm.dmcub_fw_version = le32_to_cpu(hdr->header.ucode_version);
>
> @@ -4513,6 +4485,61 @@ DEVICE_ATTR_WO(s3_debug);
>
> #endif
>
> +static int dm_init_microcode(struct amdgpu_device *adev)
> +{
> + char *fw_name_dmub;
> + int r;
> +
> + switch (adev->ip_versions[DCE_HWIP][0]) {
> + case IP_VERSION(2, 1, 0):
> + fw_name_dmub = FIRMWARE_RENOIR_DMUB;
> + if (ASICREV_IS_GREEN_SARDINE(adev->external_rev_id))
> + fw_name_dmub = FIRMWARE_GREEN_SARDINE_DMUB;
> + break;
> + case IP_VERSION(3, 0, 0):
> + if (adev->ip_versions[GC_HWIP][0] == IP_VERSION(10, 3, 0))
> + fw_name_dmub = FIRMWARE_SIENNA_CICHLID_DMUB;
> + else
> + fw_name_dmub = FIRMWARE_NAVY_FLOUNDER_DMUB;
> + break;
> + case IP_VERSION(3, 0, 1):
> + fw_name_dmub = FIRMWARE_VANGOGH_DMUB;
> + break;
> + case IP_VERSION(3, 0, 2):
> + fw_name_dmub = FIRMWARE_DIMGREY_CAVEFISH_DMUB;
> + break;
> + case IP_VERSION(3, 0, 3):
> + fw_name_dmub = FIRMWARE_BEIGE_GOBY_DMUB;
> + break;
> + case IP_VERSION(3, 1, 2):
> + case IP_VERSION(3, 1, 3):
> + fw_name_dmub = FIRMWARE_YELLOW_CARP_DMUB;
> + break;
> + case IP_VERSION(3, 1, 4):
> + fw_name_dmub = FIRMWARE_DCN_314_DMUB;
> + break;
> + case IP_VERSION(3, 1, 5):
> + fw_name_dmub = FIRMWARE_DCN_315_DMUB;
> + break;
> + case IP_VERSION(3, 1, 6):
> + fw_name_dmub = FIRMWARE_DCN316_DMUB;
> + break;
> + case IP_VERSION(3, 2, 0):
> + fw_name_dmub = FIRMWARE_DCN_V3_2_0_DMCUB;
> + break;
> + case IP_VERSION(3, 2, 1):
> + fw_name_dmub = FIRMWARE_DCN_V3_2_1_DMCUB;
> + break;
> + default:
> + /* ASIC doesn't support DMUB. */
> + return 0;
> + }
> + r = amdgpu_ucode_load(adev, &adev->dm.dmub_fw, fw_name_dmub);
> + if (r)
> + DRM_ERROR("DMUB firmware loading failed: %d\n", r);
> + return r;
> +}
> +
> static int dm_early_init(void *handle)
> {
> struct amdgpu_device *adev = (struct amdgpu_device *)handle;
> @@ -4645,7 +4672,7 @@ static int dm_early_init(void *handle)
> #endif
> adev->dc_enabled = true;
>
> - return 0;
> + return dm_init_microcode(adev);
> }
>
> static bool modereset_required(struct drm_crtc_state *crtc_state)