drm/amd/display: Use pixels per container logic for DCN314 DCCG dividers

[Why]
DP DSC YCbCr422 not working because dcn314_calculate_dccg_k1_k2_values
does not account for two pixels per container

[How]
Replace the contents of dcn314_calculate_dccg_k1_k2_values with the
code from the function dcn32_calculate_dccg_k1_k2_values
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Daniel Miess <Daniel.Miess@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -343,7 +343,10 @@ unsigned int dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsig
 {
 	struct dc_stream_state *stream = pipe_ctx->stream;
 	unsigned int odm_combine_factor = 0;
+	struct dc *dc = pipe_ctx->stream->ctx->dc;
+	bool two_pix_per_container = false;
 
+	two_pix_per_container = optc2_is_two_pixels_per_containter(&stream->timing);
 	odm_combine_factor = get_odm_config(pipe_ctx, NULL);
 
 	if (is_dp_128b_132b_signal(pipe_ctx)) {
@@ -355,16 +358,13 @@ unsigned int dcn314_calculate_dccg_k1_k2_values(struct pipe_ctx *pipe_ctx, unsig
 		else
 			*k2_div = PIXEL_RATE_DIV_BY_4;
 	} else if (dc_is_dp_signal(pipe_ctx->stream->signal)) {
-		if (stream->timing.pixel_encoding == PIXEL_ENCODING_YCBCR420) {
+		if (two_pix_per_container) {
 			*k1_div = PIXEL_RATE_DIV_BY_1;
 			*k2_div = PIXEL_RATE_DIV_BY_2;
-		} else if (stream->timing.pixel_encoding == PIXEL_ENCODING_YCBCR422) {
-			*k1_div = PIXEL_RATE_DIV_BY_2;
-			*k2_div = PIXEL_RATE_DIV_BY_2;
 		} else {
-			if (odm_combine_factor == 1)
-				*k2_div = PIXEL_RATE_DIV_BY_4;
-			else if (odm_combine_factor == 2)
+			*k1_div = PIXEL_RATE_DIV_BY_1;
+			*k2_div = PIXEL_RATE_DIV_BY_4;
+			if ((odm_combine_factor == 2) || dc->debug.enable_dp_dig_pixel_rate_div_policy)
 				*k2_div = PIXEL_RATE_DIV_BY_2;
 		}
 	}