drm/amd/display: Process crc window at DMCU

[Why & How]
Add additional MCP_SCP commands for starting/stopping updaing crc
window at DMCU

Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

4 files changed, 194 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 87b8315cfbb8..86de6eed8450 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -347,6 +347,88 @@ bool dc_stream_get_crtc_position(struct dc *dc,
 	return ret;
 }
 
+#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
+bool dc_stream_forward_dmcu_crc_window(struct dc *dc, struct dc_stream_state *stream,
+			     struct crc_params *crc_window)
+{
+	int i;
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+	struct pipe_ctx *pipe;
+	struct crc_region tmp_win, *crc_win;
+	struct otg_phy_mux mapping_tmp, *mux_mapping;
+
+	/*crc window can't be null*/
+	if (!crc_window)
+		return false;
+
+	if ((dmcu != NULL && dmcu->funcs->is_dmcu_initialized(dmcu))) {
+		crc_win = &tmp_win;
+		mux_mapping = &mapping_tmp;
+		/*set crc window*/
+		tmp_win.x_start = crc_window->windowa_x_start;
+		tmp_win.y_start = crc_window->windowa_y_start;
+		tmp_win.x_end = crc_window->windowa_x_end;
+		tmp_win.y_end = crc_window->windowa_y_end;
+
+		for (i = 0; i < MAX_PIPES; i++) {
+			pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+			if (pipe->stream == stream && !pipe->top_pipe && !pipe->prev_odm_pipe)
+				break;
+		}
+
+		/* Stream not found */
+		if (i == MAX_PIPES)
+			return false;
+
+
+		/*set mux routing info*/
+		mapping_tmp.phy_output_num = stream->link->link_enc_hw_inst;
+		mapping_tmp.otg_output_num = pipe->stream_res.tg->inst;
+
+		dmcu->funcs->forward_crc_window(dmcu, crc_win, mux_mapping);
+	} else {
+		DC_LOG_DC("dmcu is not initialized");
+		return false;
+	}
+
+	return true;
+}
+
+bool dc_stream_stop_dmcu_crc_win_update(struct dc *dc, struct dc_stream_state *stream)
+{
+	int i;
+	struct dmcu *dmcu = dc->res_pool->dmcu;
+	struct pipe_ctx *pipe;
+	struct otg_phy_mux mapping_tmp, *mux_mapping;
+
+	if ((dmcu != NULL && dmcu->funcs->is_dmcu_initialized(dmcu))) {
+		mux_mapping = &mapping_tmp;
+
+		for (i = 0; i < MAX_PIPES; i++) {
+			pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+			if (pipe->stream == stream && !pipe->top_pipe && !pipe->prev_odm_pipe)
+				break;
+		}
+
+		/* Stream not found */
+		if (i == MAX_PIPES)
+			return false;
+
+
+		/*set mux routing info*/
+		mapping_tmp.phy_output_num = stream->link->link_enc_hw_inst;
+		mapping_tmp.otg_output_num = pipe->stream_res.tg->inst;
+
+		dmcu->funcs->stop_crc_win_update(dmcu, mux_mapping);
+	} else {
+		DC_LOG_DC("dmcu is not initialized");
+		return false;
+	}
+
+	return true;
+}
+#endif
+
 /**
  * dc_stream_configure_crc() - Configure CRC capture for the given stream.
  * @dc: DC Object
diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index a597ecaf4007..e747370fc43b 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -453,6 +453,13 @@ bool dc_stream_get_crtc_position(struct dc *dc,
 				 unsigned int *v_pos,
 				 unsigned int *nom_v_pos);
 
+#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
+bool dc_stream_forward_dmcu_crc_window(struct dc *dc, struct dc_stream_state *stream,
+			     struct crc_params *crc_window);
+bool dc_stream_stop_dmcu_crc_win_update(struct dc *dc,
+				 struct dc_stream_state *stream);
+#endif
+
 bool dc_stream_configure_crc(struct dc *dc,
 			     struct dc_stream_state *stream,
 			     struct crc_params *crc_window,
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
index ddc789daf3b1..4f864501e046 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
@@ -57,6 +57,8 @@
 #define MCP_SYNC_PHY_LOCK 0x90
 #define MCP_SYNC_PHY_UNLOCK 0x91
 #define MCP_BL_SET_PWM_FRAC 0x6A  /* Enable or disable Fractional PWM */
+#define CRC_WIN_NOTIFY 0x92
+#define CRC_STOP_UPDATE 0x93
 #define MCP_SEND_EDID_CEA 0xA0
 #define EDID_CEA_CMD_ACK 1
 #define EDID_CEA_CMD_NACK 2
@@ -930,6 +932,84 @@ static bool dcn10_recv_edid_cea_ack(struct dmcu *dmcu, int *offset)
 
 #endif //(CONFIG_DRM_AMD_DC_DCN)
 
+#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
+static void dcn10_forward_crc_window(struct dmcu *dmcu,
+					struct crc_region *crc_win,
+					struct otg_phy_mux *mux_mapping)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	unsigned int dmcu_max_retry_on_wait_reg_ready = 801;
+	unsigned int dmcu_wait_reg_ready_interval = 100;
+	unsigned int crc_start = 0, crc_end = 0, otg_phy_mux = 0;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return;
+
+	if (!crc_win)
+		return;
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
+				dmcu_wait_reg_ready_interval,
+				dmcu_max_retry_on_wait_reg_ready);
+
+	/* build up nitification data */
+	crc_start = (((unsigned int) crc_win->x_start) << 16) | crc_win->y_start;
+	crc_end = (((unsigned int) crc_win->x_end) << 16) | crc_win->y_end;
+	otg_phy_mux =
+		(((unsigned int) mux_mapping->otg_output_num) << 16) | mux_mapping->phy_output_num;
+
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG1),
+					crc_start);
+
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG2),
+			crc_end);
+
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG3),
+			otg_phy_mux);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+				CRC_WIN_NOTIFY);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+}
+
+static void dcn10_stop_crc_win_update(struct dmcu *dmcu,
+					struct otg_phy_mux *mux_mapping)
+{
+	struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+	unsigned int dmcu_max_retry_on_wait_reg_ready = 801;
+	unsigned int dmcu_wait_reg_ready_interval = 100;
+	unsigned int otg_phy_mux = 0;
+
+	/* If microcontroller is not running, do nothing */
+	if (dmcu->dmcu_state != DMCU_RUNNING)
+		return;
+
+	/* waitDMCUReadyForCmd */
+	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
+				dmcu_wait_reg_ready_interval,
+				dmcu_max_retry_on_wait_reg_ready);
+
+	/* build up nitification data */
+	otg_phy_mux =
+		(((unsigned int) mux_mapping->otg_output_num) << 16) | mux_mapping->phy_output_num;
+
+	dm_write_reg(dmcu->ctx, REG(MASTER_COMM_DATA_REG1),
+					otg_phy_mux);
+
+	/* setDMCUParam_Cmd */
+	REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+				CRC_STOP_UPDATE);
+
+	/* notifyDMCUMsg */
+	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+}
+#endif
+
 static const struct dmcu_funcs dce_funcs = {
 	.dmcu_init = dce_dmcu_init,
 	.load_iram = dce_dmcu_load_iram,
@@ -953,6 +1033,10 @@ static const struct dmcu_funcs dcn10_funcs = {
 	.send_edid_cea = dcn10_send_edid_cea,
 	.recv_amd_vsdb = dcn10_recv_amd_vsdb,
 	.recv_edid_cea_ack = dcn10_recv_edid_cea_ack,
+#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
+	.forward_crc_window = dcn10_forward_crc_window,
+	.stop_crc_win_update = dcn10_stop_crc_win_update,
+#endif
 	.is_dmcu_initialized = dcn10_is_dmcu_initialized
 };
 
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h b/drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h
index cd1c0dc32bf8..8df2765cce78 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h
@@ -56,6 +56,20 @@ struct dmcu {
 	bool auto_load_dmcu;
 };
 
+#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
+struct crc_region {
+	uint16_t x_start;
+	uint16_t y_start;
+	uint16_t x_end;
+	uint16_t y_end;
+};
+
+struct otg_phy_mux {
+	uint8_t phy_output_num;
+	uint8_t otg_output_num;
+};
+#endif
+
 struct dmcu_funcs {
 	bool (*dmcu_init)(struct dmcu *dmcu);
 	bool (*load_iram)(struct dmcu *dmcu,
@@ -84,6 +98,13 @@ struct dmcu_funcs {
 			int *min_frame_rate,
 			int *max_frame_rate);
 	bool (*recv_edid_cea_ack)(struct dmcu *dmcu, int *offset);
+#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
+	void (*forward_crc_window)(struct dmcu *dmcu,
+			struct crc_region *crc_win,
+			struct otg_phy_mux *mux_mapping);
+	void (*stop_crc_win_update)(struct dmcu *dmcu,
+			struct otg_phy_mux *mux_mapping);
+#endif
 };
 
 #endif