[PATCH 3/5] drm/amd/pp: Memory Latency is always 25us on Vega10

[Harry Wentland]

From: Rex Zhu <Rex.Zhu at amd.com>

Also use the tolerable latency defined in Display
to find lowest MCLK frequency when disable mclk switch

Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
Acked-by: Alex Deucher <alexander.deucher at amd.com>
---
 .../drm/amd/powerplay/hwmgr/vega10_hwmgr.c    | 24 ++-----------------
 1 file changed, 2 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
index e9a8b527d481..3e54de061496 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_hwmgr.c
@@ -55,12 +55,6 @@
 
 static const uint32_t channel_number[] = {1, 2, 0, 4, 0, 8, 0, 16, 2};
 
-#define MEM_FREQ_LOW_LATENCY        25000
-#define MEM_FREQ_HIGH_LATENCY       80000
-#define MEM_LATENCY_HIGH            245
-#define MEM_LATENCY_LOW             35
-#define MEM_LATENCY_ERR             0xFFFF
-
 #define mmDF_CS_AON0_DramBaseAddress0                                                                  0x0044
 #define mmDF_CS_AON0_DramBaseAddress0_BASE_IDX                                                         0
 
@@ -3223,7 +3217,7 @@ static int vega10_apply_state_adjust_rules(struct pp_hwmgr *hwmgr,
 		/* Find the lowest MCLK frequency that is within
 		 * the tolerable latency defined in DAL
 		 */
-		latency = 0;
+		latency = hwmgr->display_config->dce_tolerable_mclk_in_active_latency;
 		for (i = 0; i < data->mclk_latency_table.count; i++) {
 			if ((data->mclk_latency_table.entries[i].latency <= latency) &&
 				(data->mclk_latency_table.entries[i].frequency >=
@@ -4074,18 +4068,6 @@ static void vega10_get_sclks(struct pp_hwmgr *hwmgr,
 
 }
 
-static uint32_t vega10_get_mem_latency(struct pp_hwmgr *hwmgr,
-		uint32_t clock)
-{
-	if (clock >= MEM_FREQ_LOW_LATENCY &&
-			clock < MEM_FREQ_HIGH_LATENCY)
-		return MEM_LATENCY_HIGH;
-	else if (clock >= MEM_FREQ_HIGH_LATENCY)
-		return MEM_LATENCY_LOW;
-	else
-		return MEM_LATENCY_ERR;
-}
-
 static void vega10_get_memclocks(struct pp_hwmgr *hwmgr,
 		struct pp_clock_levels_with_latency *clocks)
 {
@@ -4107,9 +4089,7 @@ static void vega10_get_memclocks(struct pp_hwmgr *hwmgr,
 					dep_table->entries[i].clk * 10;
 			clocks->data[clocks->num_levels].latency_in_us =
 			data->mclk_latency_table.entries
-			[data->mclk_latency_table.count].latency =
-					vega10_get_mem_latency(hwmgr,
-						dep_table->entries[i].clk);
+			[data->mclk_latency_table.count].latency = 25;
 			clocks->num_levels++;
 			data->mclk_latency_table.count++;
 		}
-- 
2.17.1