drm/amd/display: fix odm k2 div calculation

Correct setting is div by 2 for odm. Seamless odm transitions
are enabled with enable_dp_dig_pixel_rate_div_policy debug flag.

Fixes: a2c7356f ("drm/amd/display: fix pixel rate update sequence")
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Dmytro Laktyushkin <dmytro.laktyushkin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.c

@@ -337,13 +337,14 @@ void dcn314_enable_power_gating_plane(struct dce_hwseq *hws, bool enable)
 		REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 0);
 }
 
-void dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *k1_div, unsigned int *k2_div)
+unsigned int dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *k1_div, unsigned int *k2_div)
 {
 	struct dc_stream_state *stream = pipe_ctx->stream;
+	unsigned int odm_combine_factor = 0;
 	bool two_pix_per_container = false;
 
 	two_pix_per_container = optc2_is_two_pixels_per_containter(&stream->timing);
-	get_odm_config(pipe_ctx, NULL);
+	odm_combine_factor = get_odm_config(pipe_ctx, NULL);
 
 	if (stream->ctx->dc->link_srv->dp_is_128b_132b_signal(pipe_ctx)) {
 		*k1_div = PIXEL_RATE_DIV_BY_1;
@@ -361,11 +362,15 @@ void dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int
 		} else {
 			*k1_div = PIXEL_RATE_DIV_BY_1;
 			*k2_div = PIXEL_RATE_DIV_BY_4;
+			if (odm_combine_factor == 2)
+				*k2_div = PIXEL_RATE_DIV_BY_2;
 		}
 	}
 
 	if ((*k1_div == PIXEL_RATE_DIV_NA) && (*k2_div == PIXEL_RATE_DIV_NA))
 		ASSERT(false);
+
+	return odm_combine_factor;
 }
 
 void dcn314_set_pixels_per_cycle(struct pipe_ctx *pipe_ctx)

drivers/gpu/drm/amd/display/dc/dcn314/dcn314_hwseq.h

@@ -37,7 +37,7 @@ void dcn314_dsc_pg_control(struct dce_hwseq *hws, unsigned int dsc_inst, bool po
 
 void dcn314_enable_power_gating_plane(struct dce_hwseq *hws, bool enable);
 
-void dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *k1_div, unsigned int *k2_div);
+unsigned int dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *k1_div, unsigned int *k2_div);
 
 void dcn314_set_pixels_per_cycle(struct pipe_ctx *pipe_ctx);
 

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c

@@ -1141,9 +1141,10 @@ void dcn32_update_odm(struct dc *dc, struct dc_state *context, struct pipe_ctx *
 	}
 }
 
-void dcn32_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *k1_div, unsigned int *k2_div)
+unsigned int dcn32_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *k1_div, unsigned int *k2_div)
 {
 	struct dc_stream_state *stream = pipe_ctx->stream;
+	unsigned int odm_combine_factor = 0;
 	bool two_pix_per_container = false;
 
 	// For phantom pipes, use the same programming as the main pipes
@@ -1151,6 +1152,7 @@ void dcn32_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *
 		stream = pipe_ctx->stream->mall_stream_config.paired_stream;
 	}
 	two_pix_per_container = optc2_is_two_pixels_per_containter(&stream->timing);
+	odm_combine_factor = get_odm_config(pipe_ctx, NULL);
 
 	if (stream->ctx->dc->link_srv->dp_is_128b_132b_signal(pipe_ctx)) {
 		*k1_div = PIXEL_RATE_DIV_BY_1;
@@ -1168,13 +1170,15 @@ void dcn32_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *
 		} else {
 			*k1_div = PIXEL_RATE_DIV_BY_1;
 			*k2_div = PIXEL_RATE_DIV_BY_4;
-			if (dcn32_is_dp_dig_pixel_rate_div_policy(pipe_ctx))
+			if ((odm_combine_factor == 2) || dcn32_is_dp_dig_pixel_rate_div_policy(pipe_ctx))
 				*k2_div = PIXEL_RATE_DIV_BY_2;
 		}
 	}
 
 	if ((*k1_div == PIXEL_RATE_DIV_NA) && (*k2_div == PIXEL_RATE_DIV_NA))
 		ASSERT(false);
+
+	return odm_combine_factor;
 }
 
 void dcn32_set_pixels_per_cycle(struct pipe_ctx *pipe_ctx)

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.h

@@ -71,7 +71,7 @@ void dcn32_update_force_pstate(struct dc *dc, struct dc_state *context);
 
 void dcn32_update_odm(struct dc *dc, struct dc_state *context, struct pipe_ctx *pipe_ctx);
 
-void dcn32_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *k1_div, unsigned int *k2_div);
+unsigned int dcn32_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsigned int *k1_div, unsigned int *k2_div);
 
 void dcn32_set_pixels_per_cycle(struct pipe_ctx *pipe_ctx);
 

drivers/gpu/drm/amd/display/dc/inc/hw_sequencer_private.h

@@ -156,7 +156,7 @@ struct hwseq_private_funcs {
 	void (*program_mall_pipe_config)(struct dc *dc, struct dc_state *context);
 	void (*update_force_pstate)(struct dc *dc, struct dc_state *context);
 	void (*update_mall_sel)(struct dc *dc, struct dc_state *context);
-	void (*calculate_dccg_k1_k2_values)(struct pipe_ctx *pipe_ctx,
+	unsigned int (*calculate_dccg_k1_k2_values)(struct pipe_ctx *pipe_ctx,
 			unsigned int *k1_div,
 			unsigned int *k2_div);
 	void (*set_pixels_per_cycle)(struct pipe_ctx *pipe_ctx);