[PATCH AUTOSEL 6.14 462/642] drm/amd/display: remove TF check for LLS policy

[Sasha Levin]

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

[ Upstream commit 2a4519c4e9b2e1f622ab4c5f5841abdb9760cb0b ]

[Why & How]
LLS policy not affected by TF.
Remove check in don't care case and use
 pixel format only.

Reviewed-by: Navid Assadian <navid.assadian at amd.com>
Signed-off-by: Samson Tam <Samson.Tam at amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 drivers/gpu/drm/amd/display/dc/spl/dc_spl.c | 31 +++++----------------
 1 file changed, 7 insertions(+), 24 deletions(-)

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 153b7a8904e1e..047f05ab01810 100644
--- a/drivers/gpu/drm/amd/display/dc/spl/dc_spl.c
+++ b/drivers/gpu/drm/amd/display/dc/spl/dc_spl.c
@@ -784,25 +784,13 @@ static enum scl_mode spl_get_dscl_mode(const struct spl_in *spl_in,
 	return SCL_MODE_SCALING_420_YCBCR_ENABLE;
 }
 
-static bool spl_choose_lls_policy(enum spl_pixel_format format,
-	enum spl_transfer_func_type tf_type,
-	enum spl_transfer_func_predefined tf_predefined_type,
+static void spl_choose_lls_policy(enum spl_pixel_format format,
 	enum linear_light_scaling *lls_pref)
 {
-	if (spl_is_video_format(format)) {
+	if (spl_is_subsampled_format(format))
 		*lls_pref = LLS_PREF_NO;
-		if ((tf_type == SPL_TF_TYPE_PREDEFINED) ||
-			(tf_type == SPL_TF_TYPE_DISTRIBUTED_POINTS))
-			return true;
-	} else { /* RGB or YUV444 */
-		if ((tf_type == SPL_TF_TYPE_PREDEFINED) ||
-			(tf_type == SPL_TF_TYPE_BYPASS)) {
-			*lls_pref = LLS_PREF_YES;
-			return true;
-		}
-	}
-	*lls_pref = LLS_PREF_NO;
-	return false;
+	else /* RGB or YUV444 */
+		*lls_pref = LLS_PREF_YES;
 }
 
 /* Enable EASF ?*/
@@ -811,7 +799,6 @@ static bool enable_easf(struct spl_in *spl_in, struct spl_scratch *spl_scratch)
 	int vratio = 0;
 	int hratio = 0;
 	bool skip_easf = false;
-	bool lls_enable_easf = true;
 
 	if (spl_in->disable_easf)
 		skip_easf = true;
@@ -827,17 +814,13 @@ static bool enable_easf(struct spl_in *spl_in, struct spl_scratch *spl_scratch)
 		skip_easf = true;
 
 	/*
-	 * If lls_pref is LLS_PREF_DONT_CARE, then use pixel format and transfer
-	 *  function to determine whether to use LINEAR or NONLINEAR scaling
+	 * If lls_pref is LLS_PREF_DONT_CARE, then use pixel format
+	 *  to determine whether to use LINEAR or NONLINEAR scaling
 	 */
 	if (spl_in->lls_pref == LLS_PREF_DONT_CARE)
-		lls_enable_easf = spl_choose_lls_policy(spl_in->basic_in.format,
-			spl_in->basic_in.tf_type, spl_in->basic_in.tf_predefined_type,
+		spl_choose_lls_policy(spl_in->basic_in.format,
 			&spl_in->lls_pref);
 
-	if (!lls_enable_easf)
-		skip_easf = true;
-
 	/* Check for linear scaling or EASF preferred */
 	if (spl_in->lls_pref != LLS_PREF_YES && !spl_in->prefer_easf)
 		skip_easf = true;
-- 
2.39.5