[PATCH] drm/amd/powerplay: add support for 3DP 4K@120Hz on vega10.

[Rex.Zhu@xxxxxxx (Rex Zhu)]

Change-Id: Ic884366431afde180f9926963871a8daddc4588e
Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
---
 .../amd/powerplay/hwmgr/vega10_processpptables.c   | 39 ++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_processpptables.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_processpptables.c
index 1623644..22ebecf 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_processpptables.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_processpptables.c
@@ -31,6 +31,8 @@
 #include "cgs_common.h"
 #include "vega10_pptable.h"
 
+#define NUM_DSPCLK_LEVELS 8
+
 static void set_hw_cap(struct pp_hwmgr *hwmgr, bool enable,
 		enum phm_platform_caps cap)
 {
@@ -651,15 +653,43 @@ static int get_dcefclk_voltage_dependency_table(
 		const ATOM_Vega10_DCEFCLK_Dependency_Table *clk_dep_table)
 {
 	uint32_t table_size, i;
+	uint8_t num_entries;
 	struct phm_ppt_v1_clock_voltage_dependency_table
 				*clk_table;
+	struct cgs_system_info sys_info = {0};
+	uint32_t dev_id;
+	uint32_t rev_id;
 
 	PP_ASSERT_WITH_CODE((clk_dep_table->ucNumEntries != 0),
 			"Invalid PowerPlay Table!", return -1);
 
+/*
+ * workaround needed to add another DPM level for pioneer cards
+ * as VBIOS is locked down.
+ * This DPM level was added to support 3DPM monitors @ 4K120Hz
+ *
+ */
+	sys_info.size = sizeof(struct cgs_system_info);
+	sys_info.info_id = CGS_SYSTEM_INFO_PCIE_DEV;
+	cgs_query_system_info(hwmgr->device, &sys_info);
+	dev_id = (uint32_t)sys_info.value;
+
+	sys_info.size = sizeof(struct cgs_system_info);
+	sys_info.info_id = CGS_SYSTEM_INFO_PCIE_REV;
+	cgs_query_system_info(hwmgr->device, &sys_info);
+	rev_id = (uint32_t)sys_info.value;
+
+	if (dev_id == 0x6863 && rev_id == 0 &&
+		clk_dep_table->entries[clk_dep_table->ucNumEntries - 1].ulClk < 90000)
+		num_entries = clk_dep_table->ucNumEntries + 1 > NUM_DSPCLK_LEVELS ?
+				NUM_DSPCLK_LEVELS : clk_dep_table->ucNumEntries + 1;
+	else
+		num_entries = clk_dep_table->ucNumEntries;
+
+
 	table_size = sizeof(uint32_t) +
 			sizeof(phm_ppt_v1_clock_voltage_dependency_record) *
-			clk_dep_table->ucNumEntries;
+			num_entries;
 
 	clk_table = (struct phm_ppt_v1_clock_voltage_dependency_table *)
 			kzalloc(table_size, GFP_KERNEL);
@@ -667,7 +697,7 @@ static int get_dcefclk_voltage_dependency_table(
 	if (!clk_table)
 		return -ENOMEM;
 
-	clk_table->count = clk_dep_table->ucNumEntries;
+	clk_table->count = (uint32_t)num_entries;
 
 	for (i = 0; i < clk_table->count; i++) {
 		clk_table->entries[i].vddInd =
@@ -676,6 +706,11 @@ static int get_dcefclk_voltage_dependency_table(
 				le32_to_cpu(clk_dep_table->entries[i].ulClk);
 	}
 
+	if (i < num_entries) {
+		clk_table->entries[i].vddInd = clk_dep_table->entries[i-1].ucVddInd;
+		clk_table->entries[i].clk = 90000;
+	}
+
 	*pp_vega10_clk_dep_table = clk_table;
 
 	return 0;
-- 
1.9.1