drm/amd/display: move dc_link functions in protocols folder to dc_link_exports

[why]
link component should only have one interface serving dc.

[how]
We are moving dc_link functions exposed to DM to dc_link_exports
and unify link component interface in link.h with function pointer
to match the style of other dc component. This is the third step to move
dc_link functions under protocols folder to dc_link_exports.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 75 insertions, 8 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/inc/link.h b/drivers/gpu/drm/amd/display/dc/inc/link.h
index 9c05333f62aa..45cdf3bce2d3 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/link.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/link.h
@@ -28,14 +28,10 @@
 
 /* FILE POLICY AND INTENDED USAGE:
  *
- * This header declares link functions exposed to dc. All functions must have
- * "link_" as prefix. For example link_run_my_function. This header is strictly
- * private in dc and should never be included in other header files. dc
- * components should include this header in their .c files in order to access
- * functions in link folder. This file should never include any header files in
- * link folder. If there is a need to expose a function declared in one of
- * header files in side link folder, you need to move the function declaration
- * into this file and prefix it with "link_".
+ * This header declares link functions exposed to dc. All functions must use
+ * function pointers. This header is strictly private in dc and should never be
+ * included by DM. If DM needs to call a new link function, it needs to be
+ * translated by dc_link_exports.c.
  */
 #include "core_types.h"
 
@@ -49,12 +45,81 @@ struct link_init_data {
 };
 
 struct link_service {
+	/* Detection */
 	struct dc_sink *(*add_remote_sink)(
 			struct dc_link *link,
 			const uint8_t *edid,
 			int len,
 			struct dc_sink_init_data *init_data);
 	void (*remove_remote_sink)(struct dc_link *link, struct dc_sink *sink);
+	bool (*get_hpd_state)(struct dc_link *link);
+	void (*enable_hpd)(const struct dc_link *link);
+	void (*disable_hpd)(const struct dc_link *link);
+	void (*enable_hpd_filter)(struct dc_link *link, bool enable);
+
+	/* DDC */
+	int (*aux_transfer_raw)(struct ddc_service *ddc,
+			struct aux_payload *payload,
+			enum aux_return_code_type *operation_result);
+
+	/* DP Capability */
+	bool (*dp_is_sink_present)(struct dc_link *link);
+	bool (*dp_is_fec_supported)(const struct dc_link *link);
+	bool (*dp_get_max_link_enc_cap)(const struct dc_link *link,
+			struct dc_link_settings *max_link_enc_cap);
+	const struct dc_link_settings *(*dp_get_verified_link_cap)(
+			const struct dc_link *link);
+	bool (*dp_should_enable_fec)(const struct dc_link *link);
+	enum dp_link_encoding (*mst_decide_link_encoding_format)(const struct dc_link *link);
+	bool (*edp_decide_link_settings)(struct dc_link *link,
+			struct dc_link_settings *link_setting, uint32_t req_bw);
+	uint32_t (*bw_kbps_from_raw_frl_link_rate_data)(uint8_t bw);
+	bool (*dp_overwrite_extended_receiver_cap)(struct dc_link *link);
+	enum lttpr_mode (*dp_decide_lttpr_mode)(struct dc_link *link,
+			struct dc_link_settings *link_setting);
+
+	/* DP DPIA/PHY */
+	int (*dpia_handle_usb4_bandwidth_allocation_for_link)(struct dc_link *link, int peak_bw);
+	void (*dpia_handle_bw_alloc_response)(struct dc_link *link, uint8_t bw, uint8_t result);
+	void (*dpcd_write_rx_power_ctrl)(struct dc_link *link, bool on);
+
+	/* DP IRQ Handler */
+	bool (*dp_parse_link_loss_status)(
+		struct dc_link *link,
+		union hpd_irq_data *hpd_irq_dpcd_data);
+	bool (*dp_should_allow_hpd_rx_irq)(const struct dc_link *link);
+	void (*dp_handle_link_loss)(struct dc_link *link);
+	enum dc_status (*dp_read_hpd_rx_irq_data)(
+		struct dc_link *link,
+		union hpd_irq_data *irq_data);
+	bool (*dp_handle_hpd_rx_irq)(struct dc_link *link,
+			union hpd_irq_data *out_hpd_irq_dpcd_data, bool *out_link_loss,
+			bool defer_handling, bool *has_left_work);
+
+	/* eDP Panel Control */
+	void (*edp_panel_backlight_power_on)(struct dc_link *link, bool wait_for_hpd);
+	int (*edp_get_backlight_level)(const struct dc_link *link);
+	bool (*edp_get_backlight_level_nits)(struct dc_link *link,
+			uint32_t *backlight_millinits_avg,
+			uint32_t *backlight_millinits_peak);
+	bool (*edp_set_backlight_level)(const struct dc_link *link,
+			uint32_t backlight_pwm_u16_16,
+			uint32_t frame_ramp);
+	bool (*edp_set_backlight_level_nits)(struct dc_link *link,
+			bool isHDR,
+			uint32_t backlight_millinits,
+			uint32_t transition_time_in_ms);
+	int (*edp_get_target_backlight_pwm)(const struct dc_link *link);
+	bool (*edp_get_psr_state)(const struct dc_link *link, enum dc_psr_state *state);
+	bool (*edp_set_psr_allow_active)(struct dc_link *link, const bool *allow_active,
+			bool wait, bool force_static, const unsigned int *power_opts);
+	bool (*edp_setup_psr)(struct dc_link *link,
+			const struct dc_stream_state *stream,
+			struct psr_config *psr_config,
+			struct psr_context *psr_context);
+	bool (*edp_wait_for_t12)(struct dc_link *link);
+
+	/* DP CTS */
 	void (*dp_handle_automated_test)(struct dc_link *link);
 	bool (*dp_set_test_pattern)(
 			struct dc_link *link,
@@ -71,6 +136,8 @@ struct link_service {
 			struct dc_link_training_overrides *lt_overrides,
 			struct dc_link *link,
 			bool skip_immediate_retrain);
+
+	/* DP Trace */
 	bool (*dp_trace_is_initialized)(struct dc_link *link);
 	void (*dp_trace_set_is_logged_flag)(struct dc_link *link,
 			bool in_detection,