From: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Date: Wed, 8 Aug 2018 18:27:55 -0400
Subject: drm/amd/display: fix dentist did ranges
Git-commit: 39a3cd6783521cb9ec463033ea6a24e42c2d5508
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Dentist did ranges were incomplete as max setting has an unusual
divider step up of 66.

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clocks.c
@@ -106,7 +106,8 @@ enum dentist_base_divider_id {
 	DENTIST_BASE_DID_1 = 0x08,
 	DENTIST_BASE_DID_2 = 0x40,
 	DENTIST_BASE_DID_3 = 0x60,
-	DENTIST_MAX_DID    = 0x80
+	DENTIST_BASE_DID_4 = 0x7e,
+	DENTIST_MAX_DID = 0x7f
 };
 
 /* Starting point and step size for each divider range.*/
@@ -117,6 +118,8 @@ enum dentist_divider_range {
 	DENTIST_DIVIDER_RANGE_2_STEP  = 2,   /* 0.50  */
 	DENTIST_DIVIDER_RANGE_3_START = 128, /* 32.00 */
 	DENTIST_DIVIDER_RANGE_3_STEP  = 4,   /* 1.00  */
+	DENTIST_DIVIDER_RANGE_4_START = 248, /* 62.00 */
+	DENTIST_DIVIDER_RANGE_4_STEP  = 264, /* 66.00 */
 	DENTIST_DIVIDER_RANGE_SCALE_FACTOR = 4
 };
 
@@ -133,9 +136,12 @@ static int dentist_get_divider_from_did(
 	} else if (did < DENTIST_BASE_DID_3) {
 		return DENTIST_DIVIDER_RANGE_2_START + DENTIST_DIVIDER_RANGE_2_STEP
 							* (did - DENTIST_BASE_DID_2);
-	} else {
+	} else if (did < DENTIST_BASE_DID_4) {
 		return DENTIST_DIVIDER_RANGE_3_START + DENTIST_DIVIDER_RANGE_3_STEP
 							* (did - DENTIST_BASE_DID_3);
+	} else {
+		return DENTIST_DIVIDER_RANGE_4_START + DENTIST_DIVIDER_RANGE_4_STEP
+							* (did - DENTIST_BASE_DID_4);
 	}
 }