drm/amd/display: Fix TMDS 4K@60Hz YCbCr420 corruption issue

[Why]
DIG_FIFO_OUTPUT_PIXEL_MODE not being set for dcn314
resulting in incorrect timing for YCbCr4:2:0

[How]
Copy the implementation of set_pixels_per_cycle from dcn32
over to dcn314
Reviewed-by: NNicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: NTom Chung <chiahsuan.chung@amd.com>
Signed-off-by: NDaniel Miess <Daniel.Miess@amd.com>
Tested-by: NDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -374,3 +374,31 @@ unsigned int dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsig
 
 	return odm_combine_factor;
 }
+
+void dcn314_set_pixels_per_cycle(struct pipe_ctx *pipe_ctx)
+{
+	uint32_t pix_per_cycle = 1;
+	uint32_t odm_combine_factor = 1;
+
+	if (!pipe_ctx || !pipe_ctx->stream || !pipe_ctx->stream_res.stream_enc)
+		return;
+
+	odm_combine_factor = get_odm_config(pipe_ctx, NULL);
+	if (optc2_is_two_pixels_per_containter(&pipe_ctx->stream->timing) || odm_combine_factor > 1
+		|| dcn314_is_dp_dig_pixel_rate_div_policy(pipe_ctx))
+		pix_per_cycle = 2;
+
+	if (pipe_ctx->stream_res.stream_enc->funcs->set_input_mode)
+		pipe_ctx->stream_res.stream_enc->funcs->set_input_mode(pipe_ctx->stream_res.stream_enc,
+				pix_per_cycle);
+}
+
+bool dcn314_is_dp_dig_pixel_rate_div_policy(struct pipe_ctx *pipe_ctx)
+{
+	struct dc *dc = pipe_ctx->stream->ctx->dc;
+
+	if (dc_is_dp_signal(pipe_ctx->stream->signal) && !is_dp_128b_132b_signal(pipe_ctx) &&
+		dc->debug.enable_dp_dig_pixel_rate_div_policy)
+		return true;
+	return false;
+}

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

@@ -39,4 +39,8 @@ void dcn314_enable_power_gating_plane(struct dce_hwseq *hws, bool enable);
 
 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);
+
+bool dcn314_is_dp_dig_pixel_rate_div_policy(struct pipe_ctx *pipe_ctx);
+
 #endif /* __DC_HWSS_DCN314_H__ */

drivers/gpu/drm/amd/display/dc/dcn314/dcn314_init.c

@@ -145,6 +145,8 @@ static const struct hwseq_private_funcs dcn314_private_funcs = {
 	.set_shaper_3dlut = dcn20_set_shaper_3dlut,
 	.setup_hpo_hw_control = dcn31_setup_hpo_hw_control,
 	.calculate_dccg_k1_k2_values = dcn314_calculate_dccg_k1_k2_values,
+	.set_pixels_per_cycle = dcn314_set_pixels_per_cycle,
+	.is_dp_dig_pixel_rate_div_policy = dcn314_is_dp_dig_pixel_rate_div_policy,
 };
 
 void dcn314_hw_sequencer_construct(struct dc *dc)