drm/i915/dmc: Reduce wakelock hold time

__intel_dmc_wl_release() schedules delayed work which releases the DMC
wakelock after a fixed timeout of 50 ms. Until the delayed work runs,
the wakelock remains held and prevents entry into deeper DC states.

Reduce DMC_WAKELOCK_HOLD_TIME from 50 ms to 5 ms.
This should allow the system to enter deeper DC states sooner once MMIO
activity settles down.

Changes in v2:
- Drop detailed explanation from commit message
  and keep it concise (Suraj Kandpal, Luca Coelho)

Signed-off-by: Dibin Moolakadan Subrahmanian <dibin.moolakadan.subrahmanian@intel.com>
Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260407105102.3730973-1-dibin.moolakadan.subrahmanian@intel.com

diff --git a/drivers/gpu/drm/i915/display/intel_dmc_wl.c b/drivers/gpu/drm/i915/display/intel_dmc_wl.c
index 73a3101514f3b7f876427ced7993ff1d8346a667..ddf1a1f1ebc3b82154ef151b62d9372647795623 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dmc_wl.c
+++ b/drivers/gpu/drm/i915/display/intel_dmc_wl.c
@@ -46,7 +46,7 @@
  * atomic variant of waiting MMIO.
  */
 #define DMC_WAKELOCK_CTL_TIMEOUT_US 5000
-#define DMC_WAKELOCK_HOLD_TIME 50
+#define DMC_WAKELOCK_HOLD_TIME 5
 
 /*
  * Possible non-negative values for the enable_dmc_wl param.