[PATCH 04/28] drm/amd/display: Always Scale Flag

[Ray Wu <ray.wu@amd.com>]

From: Jesse Agate <jesse.agate@amd.com>

[Why & How]
When always scale flag is set at the API level, the number of taps
should not be overridden to zero in the identity scaling ratio case,
and luma scale should not be set to bypass regardless of luma scale
ratio

Reviewed-by: Samson Tam <samson.tam@amd.com>
Signed-off-by: Jesse Agate <jesse.agate@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
---
 drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c | 25 +++++++++++---------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c b/drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c
index 28348734d900..002eb926cca4 100644
--- a/drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c
+++ b/drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c
@@ -776,7 +776,7 @@ static enum scl_mode spl_get_dscl_mode(const struct spl_in *spl_in,
 	 * Do not bypass UV at 1:1 for cositing to be applied
 	 */
 	if (!enable_isharp) {
-		if (data->ratios.horz.value == one && data->ratios.vert.value == one)
+		if (data->ratios.horz.value == one && data->ratios.vert.value == one && !spl_in->basic_out.always_scale)
 			return SCL_MODE_SCALING_420_LUMA_BYPASS;
 	}
 
@@ -884,7 +884,7 @@ static bool spl_get_isharp_en(struct spl_in *spl_in,
 
 /* Calculate number of tap with adaptive scaling off */
 static void spl_get_taps_non_adaptive_scaler(
-	  struct spl_scratch *spl_scratch, const struct spl_taps *in_taps)
+	  struct spl_scratch *spl_scratch, const struct spl_taps *in_taps, bool always_scale)
 {
 	bool check_max_downscale = false;
 
@@ -944,15 +944,15 @@ static void spl_get_taps_non_adaptive_scaler(
 		spl_fixpt_from_fraction(6, 1));
 	SPL_ASSERT(check_max_downscale);
 
-	if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.horz))
+
+	if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.horz) && !always_scale)
 		spl_scratch->scl_data.taps.h_taps = 1;
-	if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.vert))
+	if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.vert) && !always_scale)
 		spl_scratch->scl_data.taps.v_taps = 1;
-	if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.horz_c))
+	if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.horz_c) && !always_scale)
 		spl_scratch->scl_data.taps.h_taps_c = 1;
-	if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.vert_c))
+	if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.vert_c) && !always_scale)
 		spl_scratch->scl_data.taps.v_taps_c = 1;
-
 }
 
 /* Calculate optimal number of taps */
@@ -965,13 +965,15 @@ static bool spl_get_optimal_number_of_taps(
 	unsigned int max_taps_y, max_taps_c;
 	unsigned int min_taps_y, min_taps_c;
 	enum lb_memory_config lb_config;
-	bool skip_easf = false;
+	bool skip_easf     = false;
+	bool always_scale  = spl_in->basic_out.always_scale;
 	bool is_subsampled = spl_is_subsampled_format(spl_in->basic_in.format);
 
+
 	if (spl_scratch->scl_data.viewport.width > spl_scratch->scl_data.h_active &&
 		max_downscale_src_width != 0 &&
 		spl_scratch->scl_data.viewport.width > max_downscale_src_width) {
-		spl_get_taps_non_adaptive_scaler(spl_scratch, in_taps);
+		spl_get_taps_non_adaptive_scaler(spl_scratch, in_taps, always_scale);
 		*enable_easf_v = false;
 		*enable_easf_h = false;
 		*enable_isharp = false;
@@ -980,7 +982,7 @@ static bool spl_get_optimal_number_of_taps(
 
 	/* Disable adaptive scaler and sharpener when integer scaling is enabled */
 	if (spl_in->scaling_quality.integer_scaling) {
-		spl_get_taps_non_adaptive_scaler(spl_scratch, in_taps);
+		spl_get_taps_non_adaptive_scaler(spl_scratch, in_taps, always_scale);
 		*enable_easf_v = false;
 		*enable_easf_h = false;
 		*enable_isharp = false;
@@ -996,7 +998,7 @@ static bool spl_get_optimal_number_of_taps(
 	 * taps = 4 for upscaling
 	 */
 	if (skip_easf)
-		spl_get_taps_non_adaptive_scaler(spl_scratch, in_taps);
+		spl_get_taps_non_adaptive_scaler(spl_scratch, in_taps, always_scale);
 	else {
 		if (spl_is_video_format(spl_in->basic_in.format)) {
 			spl_scratch->scl_data.taps.h_taps = 6;
@@ -1898,3 +1900,4 @@ bool SPL_NAMESPACE(spl_get_number_of_taps(struct spl_in *spl_in, struct spl_out
 	spl_set_taps_data(dscl_prog_data, data);
 	return res;
 }
+
-- 
2.43.0