drm/amd/display: use even ODM slice width for two pixels per container

[why]
When optc uses two pixel per container, each ODM slice width must be an
even number.

[how]
If ODM slice width is odd number increase it by 1.
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@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/spl/dc_spl.c

@@ -173,6 +173,9 @@ static struct spl_rect calculate_odm_slice_in_timing_active(struct spl_in *spl_i
 	int odm_slice_width = h_active / odm_slice_count;
 	struct spl_rect odm_rec;
 
+	if (spl_in->basic_out.use_two_pixels_per_container && (odm_slice_width % 2))
+		odm_slice_width++;
+
 	odm_rec.x = odm_slice_width * odm_slice_idx;
 	odm_rec.width = is_last_odm_slice ?
 			/* last slice width is the reminder of h_active */

drivers/gpu/drm/amd/display/dc/spl/dc_spl_types.h

@@ -441,6 +441,7 @@ struct basic_out {
 	bool always_scale;	// Is always scale enabled? Required for getting SCL_MODE
 	int max_downscale_src_width; // Required to get optimal no of taps
 	bool alpha_en;
+	bool use_two_pixels_per_container;
 };
 enum explicit_sharpness	{
 	SHARPNESS_LOW = 0,