[v2] drm/amd/pp: enable power limit increase in OD mode

Submitted by Greathouse, Joseph on Oct. 18, 2018, 7:44 p.m.

Details

Message ID 1539891802-4011-1-git-send-email-Joseph.Greathouse@amd.com
State Accepted
Commit f7becf9a0803030ae125189823328e2d62b90f7b
Headers show
Series "drm/amd/pp: enable power limit increase in OD mode" ( rev: 2 ) in AMD X.Org drivers

Browsing this patch as part of:
"drm/amd/pp: enable power limit increase in OD mode" rev 2 in AMD X.Org drivers
<< prev patch [1/1] next patch >>

Commit Message

Greathouse, Joseph Oct. 18, 2018, 7:44 p.m.
OverDrive mode allows users to increase the maximum SCLK and MCLK
frequencies beyond the default on the GPU. However, this may not
results in large performance gains if the GPU then runs into its TDP
power limit. This patch adds the capability to increase the power
limit of a GPU above its default maximum.

This is only allowed when overdrive is enabled in the ppfeaturemask,
since this is an overdrive feature. The TDPODLimit value from the
VBIOS describes how how much higher the TDP should be allowed to go
over its default, in percentage.

v2: Moved dereference of hwmgr to after its validity check

Signed-off-by: Joseph Greathouse <Joseph.Greathouse@amd.com>
---
 drivers/gpu/drm/amd/powerplay/amd_powerplay.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
index e8964ca..586f1ff 100644
--- a/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/powerplay/amd_powerplay.c
@@ -963,6 +963,7 @@  static int pp_dpm_switch_power_profile(void *handle,
 static int pp_set_power_limit(void *handle, uint32_t limit)
 {
 	struct pp_hwmgr *hwmgr = handle;
+	uint32_t max_power_limit;
 
 	if (!hwmgr || !hwmgr->pm_en)
 		return -EINVAL;
@@ -975,7 +976,13 @@  static int pp_set_power_limit(void *handle, uint32_t limit)
 	if (limit == 0)
 		limit = hwmgr->default_power_limit;
 
-	if (limit > hwmgr->default_power_limit)
+	max_power_limit = hwmgr->default_power_limit;
+	if (hwmgr->od_enabled) {
+		max_power_limit *= (100 + hwmgr->platform_descriptor.TDPODLimit);
+		max_power_limit /= 100;
+	}
+
+	if (limit > max_power_limit)
 		return -EINVAL;
 
 	mutex_lock(&hwmgr->smu_lock);
@@ -994,8 +1001,13 @@  static int pp_get_power_limit(void *handle, uint32_t *limit, bool default_limit)
 
 	mutex_lock(&hwmgr->smu_lock);
 
-	if (default_limit)
+	if (default_limit) {
 		*limit = hwmgr->default_power_limit;
+		if (hwmgr->od_enabled) {
+			*limit *= (100 + hwmgr->platform_descriptor.TDPODLimit);
+			*limit /= 100;
+		}
+	}
 	else
 		*limit = hwmgr->power_limit;