drm/radeon: add DisplayPort MST support (v2)

This adds initial DP 1.2 MST support to radeon, on CAYMAN
and up in theory.

This is off by default.

v2: agd5f:
- add UNIPHY3 offsets
- move atom cmd table code into atombios_encoders.c
- whitespace cleanup
- replace some magic numbers with proper defines

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index c612289..fa91a17 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -33,6 +33,7 @@
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_dp_helper.h>
+#include <drm/drm_dp_mst_helper.h>
 #include <drm/drm_fixed.h>
 #include <drm/drm_crtc_helper.h>
 #include <linux/i2c.h>
@@ -439,12 +440,24 @@ struct radeon_encoder_atom_dig {
 	uint8_t backlight_level;
 	int panel_mode;
 	struct radeon_afmt *afmt;
+	int active_mst_links;
 };
 
 struct radeon_encoder_atom_dac {
 	enum radeon_tv_std tv_std;
 };
 
+struct radeon_encoder_mst {
+	int crtc;
+	struct radeon_encoder *primary;
+	struct radeon_connector *connector;
+	struct drm_dp_mst_port *port;
+	int pbn;
+	int fe;
+	bool fe_from_be;
+	bool enc_active;
+};
+
 struct radeon_encoder {
 	struct drm_encoder base;
 	uint32_t encoder_enum;
@@ -464,6 +477,10 @@ struct radeon_encoder {
 	u16 caps;
 	struct radeon_audio_funcs *audio;
 	enum radeon_output_csc output_csc;
+	bool can_mst;
+	uint32_t offset;
+	bool is_mst_encoder;
+	/* front end for this mst encoder */
 };
 
 struct radeon_connector_atom_dig {
@@ -474,6 +491,7 @@ struct radeon_connector_atom_dig {
 	int dp_clock;
 	int dp_lane_count;
 	bool edp_on;
+	bool is_mst;
 };
 
 struct radeon_gpio_rec {
@@ -517,6 +535,11 @@ enum radeon_connector_dither {
 	RADEON_FMT_DITHER_ENABLE = 1,
 };
 
+struct stream_attribs {
+	uint16_t fe;
+	uint16_t slots;
+};
+
 struct radeon_connector {
 	struct drm_connector base;
 	uint32_t connector_id;
@@ -538,6 +561,14 @@ struct radeon_connector {
 	enum radeon_connector_audio audio;
 	enum radeon_connector_dither dither;
 	int pixelclock_for_modeset;
+	bool is_mst_connector;
+	struct radeon_connector *mst_port;
+	struct drm_dp_mst_port *port;
+	struct drm_dp_mst_topology_mgr mst_mgr;
+
+	struct radeon_encoder *mst_encoder;
+	struct stream_attribs cur_stream_attribs[6];
+	int enabled_attribs;
 };
 
 struct radeon_framebuffer {
@@ -740,6 +771,8 @@ extern void atombios_dig_transmitter_setup(struct drm_encoder *encoder,
 extern void atombios_dig_transmitter_setup2(struct drm_encoder *encoder,
 					    int action, uint8_t lane_num,
 					    uint8_t lane_set, int fe);
+extern void atombios_set_mst_encoder_crtc_source(struct drm_encoder *encoder,
+						 int fe);
 extern void radeon_atom_ext_encoder_setup_ddc(struct drm_encoder *encoder);
 extern struct drm_encoder *radeon_get_external_encoder(struct drm_encoder *encoder);
 void radeon_atom_copy_swap(u8 *dst, u8 *src, u8 num_bytes, bool to_le);
@@ -960,6 +993,15 @@ void radeon_crtc_handle_flip(struct radeon_device *rdev, int crtc_id);
 
 int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bool tiled);
 
+/* mst */
+int radeon_dp_mst_init(struct radeon_connector *radeon_connector);
+int radeon_dp_mst_probe(struct radeon_connector *radeon_connector);
+int radeon_dp_mst_check_status(struct radeon_connector *radeon_connector);
+int radeon_mst_debugfs_init(struct radeon_device *rdev);
+void radeon_dp_mst_prepare_pll(struct drm_crtc *crtc, struct drm_display_mode *mode);
+
+void radeon_setup_mst_connector(struct drm_device *dev);
+
 int radeon_atom_pick_dig_encoder(struct drm_encoder *encoder, int fe_idx);
 void radeon_atom_release_dig_encoder(struct radeon_device *rdev, int enc_idx);
 #endif