drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
Extension
.c
Size
48168 bytes
Lines
1484
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (fw_info) {
			memcpy(fw_info_out, fw_info, sizeof(*fw_info));
			return DMUB_STATUS_OK;
		}
		params->inst_const_size = inst_const_size_temp;
	}

	/* Try 256-byte psp footer size */
	params->inst_const_size -= PSP_FOOTER_BYTES_256;
	fw_info = dmub_get_fw_meta_info(params);
	if (fw_info) {
		memcpy(fw_info_out, fw_info, sizeof(*fw_info));
		return DMUB_STATUS_OK;
	}

	/* Try 512-byte psp footer size - final attempt */
	params->inst_const_size -= PSP_FOOTER_BYTES_256; // 256 bytes already subtracted, subtract 256 again
	fw_info = dmub_get_fw_meta_info(params);
	if (fw_info) {
		memcpy(fw_info_out, fw_info, sizeof(*fw_info));
		return DMUB_STATUS_OK;
	}

	/* Restore original inst_const_size and subtract default PSP footer size - default behaviour */
	params->inst_const_size = inst_const_size_temp - PSP_FOOTER_BYTES_256;

	return DMUB_STATUS_INVALID;
}

static bool dmub_srv_hw_setup(struct dmub_srv *dmub, enum dmub_asic asic)
{
	struct dmub_srv_hw_funcs *funcs = &dmub->hw_funcs;

	/* default to specifying now inbox type */
	enum dmub_inbox_cmd_interface_type default_inbox_type = DMUB_CMD_INTERFACE_DEFAULT;

	switch (asic) {
	case DMUB_ASIC_DCN20:
	case DMUB_ASIC_DCN21:
	case DMUB_ASIC_DCN30:
	case DMUB_ASIC_DCN301:
	case DMUB_ASIC_DCN302:
	case DMUB_ASIC_DCN303:
		dmub->regs = &dmub_srv_dcn20_regs;

		funcs->reset = dmub_dcn20_reset;
		funcs->reset_release = dmub_dcn20_reset_release;
		funcs->backdoor_load = dmub_dcn20_backdoor_load;
		funcs->setup_windows = dmub_dcn20_setup_windows;
		funcs->setup_mailbox = dmub_dcn20_setup_mailbox;
		funcs->get_inbox1_wptr = dmub_dcn20_get_inbox1_wptr;
		funcs->get_inbox1_rptr = dmub_dcn20_get_inbox1_rptr;
		funcs->set_inbox1_wptr = dmub_dcn20_set_inbox1_wptr;
		funcs->is_supported = dmub_dcn20_is_supported;
		funcs->is_hw_init = dmub_dcn20_is_hw_init;
		funcs->set_gpint = dmub_dcn20_set_gpint;
		funcs->is_gpint_acked = dmub_dcn20_is_gpint_acked;
		funcs->get_gpint_response = dmub_dcn20_get_gpint_response;
		funcs->get_fw_status = dmub_dcn20_get_fw_boot_status;
		funcs->enable_dmub_boot_options = dmub_dcn20_enable_dmub_boot_options;
		funcs->skip_dmub_panel_power_sequence = dmub_dcn20_skip_dmub_panel_power_sequence;
		funcs->get_current_time = dmub_dcn20_get_current_time;

		// Out mailbox register access functions for RN and above
		funcs->setup_out_mailbox = dmub_dcn20_setup_out_mailbox;
		funcs->get_outbox1_wptr = dmub_dcn20_get_outbox1_wptr;
		funcs->set_outbox1_rptr = dmub_dcn20_set_outbox1_rptr;

		//outbox0 call stacks
		funcs->setup_outbox0 = dmub_dcn20_setup_outbox0;
		funcs->get_outbox0_wptr = dmub_dcn20_get_outbox0_wptr;
		funcs->set_outbox0_rptr = dmub_dcn20_set_outbox0_rptr;

		funcs->get_diagnostic_data = dmub_dcn20_get_diagnostic_data;

		if (asic == DMUB_ASIC_DCN21)
			dmub->regs = &dmub_srv_dcn21_regs;

		if (asic == DMUB_ASIC_DCN30) {
			dmub->regs = &dmub_srv_dcn30_regs;

			funcs->backdoor_load = dmub_dcn30_backdoor_load;
			funcs->setup_windows = dmub_dcn30_setup_windows;
		}
		if (asic == DMUB_ASIC_DCN301) {
			dmub->regs = &dmub_srv_dcn301_regs;

			funcs->backdoor_load = dmub_dcn30_backdoor_load;
			funcs->setup_windows = dmub_dcn30_setup_windows;
		}

Annotation

Implementation Notes