[PATCH 4/9] drm/amd/display: Add support for custom recout_width in SPL

[Alex Hung]

From: Samson Tam <Samson.Tam at amd.com>

[WHY]
Add support for custom recout_width for mpc combine in SPL

[HOW]
1. Rename mpc_combine_h and mpc_combine_v
2. Add flag use_recout_width_aligned to use custom recout_width
3. Create union to use either mpc_num_h_slices or mpc_recout_width_align

Reviewed-by: Navid Assadian <navid.assadian at amd.com>
Signed-off-by: Samson Tam <Samson.Tam at amd.com>
Signed-off-by: Alex Hung <alex.hung at amd.com>
---
 .../gpu/drm/amd/display/dc/dc_spl_translate.c |  8 +++--
 drivers/gpu/drm/amd/display/dc/spl/dc_spl.c   | 31 ++++++++++++++-----
 .../gpu/drm/amd/display/dc/spl/dc_spl_types.h | 10 ++++--
 3 files changed, 37 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dc_spl_translate.c b/drivers/gpu/drm/amd/display/dc/dc_spl_translate.c
index c8d8e335fa37..2fee0b92f1f5 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_spl_translate.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_spl_translate.c
@@ -108,12 +108,14 @@ void translate_SPL_in_params_from_pipe_ctx(struct pipe_ctx *pipe_ctx, struct spl
 	spl_in->basic_in.horizontal_mirror = plane_state->horizontal_mirror;
 
 	// Calculate horizontal splits and split index
-	spl_in->basic_in.mpc_combine_h = resource_get_mpc_slice_count(pipe_ctx);
+	spl_in->basic_in.num_h_slices_recout_width_align.use_recout_width_aligned = false;
+	spl_in->basic_in.num_h_slices_recout_width_align.num_slices_recout_width.mpc_num_h_slices =
+		resource_get_mpc_slice_count(pipe_ctx);
 
 	if (stream->view_format == VIEW_3D_FORMAT_SIDE_BY_SIDE)
-		spl_in->basic_in.mpc_combine_v = 0;
+		spl_in->basic_in.mpc_h_slice_index = 0;
 	else
-		spl_in->basic_in.mpc_combine_v = resource_get_mpc_slice_index(pipe_ctx);
+		spl_in->basic_in.mpc_h_slice_index = resource_get_mpc_slice_index(pipe_ctx);
 
 	populate_splrect_from_rect(&spl_in->basic_out.odm_slice_rect, &odm_slice_src);
 	spl_in->basic_out.odm_combine_factor = 0;
diff --git a/drivers/gpu/drm/amd/display/dc/spl/dc_spl.c b/drivers/gpu/drm/amd/display/dc/spl/dc_spl.c
index 27fd20fa2942..c92312fec7a9 100644
--- a/drivers/gpu/drm/amd/display/dc/spl/dc_spl.c
+++ b/drivers/gpu/drm/amd/display/dc/spl/dc_spl.c
@@ -137,15 +137,32 @@ static struct spl_rect calculate_mpc_slice_in_timing_active(
 		struct spl_in *spl_in,
 		struct spl_rect *plane_clip_rec)
 {
-	int mpc_slice_count = spl_in->basic_in.mpc_combine_h;
-	int mpc_slice_idx = spl_in->basic_in.mpc_combine_v;
+	bool use_recout_width_aligned =
+		spl_in->basic_in.num_h_slices_recout_width_align.use_recout_width_aligned;
+	int mpc_slice_count =
+		spl_in->basic_in.num_h_slices_recout_width_align.num_slices_recout_width.mpc_num_h_slices;
+	int recout_width_align =
+		spl_in->basic_in.num_h_slices_recout_width_align.num_slices_recout_width.mpc_recout_width_align;
+	int mpc_slice_idx = spl_in->basic_in.mpc_h_slice_index;
 	int epimo = mpc_slice_count - plane_clip_rec->width % mpc_slice_count - 1;
 	struct spl_rect mpc_rec;
 
-	mpc_rec.width = plane_clip_rec->width / mpc_slice_count;
-	mpc_rec.x = plane_clip_rec->x + mpc_rec.width * mpc_slice_idx;
-	mpc_rec.height = plane_clip_rec->height;
-	mpc_rec.y = plane_clip_rec->y;
+	if (use_recout_width_aligned) {
+		mpc_rec.width = recout_width_align;
+		if ((mpc_rec.width * (mpc_slice_idx + 1)) > plane_clip_rec->width) {
+			mpc_rec.width = plane_clip_rec->width % recout_width_align;
+			mpc_rec.x = plane_clip_rec->x + recout_width_align * mpc_slice_idx;
+		} else
+			mpc_rec.x = plane_clip_rec->x + mpc_rec.width * mpc_slice_idx;
+		mpc_rec.height = plane_clip_rec->height;
+		mpc_rec.y = plane_clip_rec->y;
+
+	} else {
+		mpc_rec.width = plane_clip_rec->width / mpc_slice_count;
+		mpc_rec.x = plane_clip_rec->x + mpc_rec.width * mpc_slice_idx;
+		mpc_rec.height = plane_clip_rec->height;
+		mpc_rec.y = plane_clip_rec->y;
+	}
 	SPL_ASSERT(mpc_slice_count == 1 ||
 			spl_in->basic_out.view_format != SPL_VIEW_3D_SIDE_BY_SIDE ||
 			mpc_rec.width % 2 == 0);
@@ -678,7 +695,7 @@ static void spl_handle_3d_recout(struct spl_in *spl_in, struct spl_rect *recout)
 	 * since 3d is special and needs to calculate vp as if there is no recout offset
 	 * This may break with rotation, good thing we aren't mixing hw rotation and 3d
 	 */
-	if (spl_in->basic_in.mpc_combine_v) {
+	if (spl_in->basic_in.mpc_h_slice_index) {
 		SPL_ASSERT(spl_in->basic_in.rotation == SPL_ROTATION_ANGLE_0 ||
 			(spl_in->basic_out.view_format != SPL_VIEW_3D_TOP_AND_BOTTOM &&
 					spl_in->basic_out.view_format != SPL_VIEW_3D_SIDE_BY_SIDE));
diff --git a/drivers/gpu/drm/amd/display/dc/spl/dc_spl_types.h b/drivers/gpu/drm/amd/display/dc/spl/dc_spl_types.h
index 55d557df4aa5..0e6db94bbfb2 100644
--- a/drivers/gpu/drm/amd/display/dc/spl/dc_spl_types.h
+++ b/drivers/gpu/drm/amd/display/dc/spl/dc_spl_types.h
@@ -436,8 +436,14 @@ struct basic_in	{
 	struct spl_rect clip_rect; // Clip rect
 	enum spl_rotation_angle rotation;  // Rotation
 	bool horizontal_mirror;  // Horizontal mirror
-	int mpc_combine_h; // MPC Horizontal Combine Factor (split_count)
-	int mpc_combine_v; // MPC Vertical Combine Factor (split_idx)
+	struct { // previous mpc_combine_h - split count
+		bool use_recout_width_aligned;
+		union {
+			int mpc_num_h_slices;
+			int mpc_recout_width_align;
+		} num_slices_recout_width;
+	} num_h_slices_recout_width_align;
+	int mpc_h_slice_index; // previous mpc_combine_v - split_idx
 	// Inputs for adaptive scaler - TODO
 	enum spl_transfer_func_type tf_type; /* Transfer function type */
 	enum spl_transfer_func_predefined tf_predefined_type; /* Transfer function predefined type */
-- 
2.43.0