On 23/05/2023 00:09, Andi Shyti wrote:
Hi Tvrtko,
On Mon, May 22, 2023 at 12:59:27PM +0100, Tvrtko Ursulin wrote:
From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
In preparation for exposing via sysfs add helpers for managing rps
thresholds.
v2:
* Force sw and hw re-programming on threshold change.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_rps.c | 54 +++++++++++++++++++++++++++++
drivers/gpu/drm/i915/gt/intel_rps.h | 4 +++
2 files changed, 58 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index 333abc8f7ecb..afde601a6111 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -16,7 +16,9 @@
#include "intel_gt.h"
#include "intel_gt_clock_utils.h"
#include "intel_gt_irq.h"
+#include "intel_gt_pm.h"
#include "intel_gt_pm_irq.h"
+#include "intel_gt_print.h"
#include "intel_gt_regs.h"
#include "intel_mchbar_regs.h"
#include "intel_pcode.h"
@@ -2574,6 +2576,58 @@ int intel_rps_set_min_frequency(struct intel_rps *rps, u32 val)
return set_min_freq(rps, val);
}
+u8 intel_rps_get_up_threshold(struct intel_rps *rps)
+{
+ return rps->power.up_threshold;
+}
+
+static int rps_set_threshold(struct intel_rps *rps, u8 *threshold, u8 val)
+{
+ int ret;
+
+ if (val > 100)
+ return -EINVAL;
+
+ ret = mutex_lock_interruptible(&rps->lock);
+ if (ret)
+ return ret;
+
+ if (*threshold == val)
+ goto out_unlock;
+
+ *threshold = val;
+
+ /* Force reset. */
+ rps->last_freq = -1;
+ mutex_lock(&rps->power.mutex);
+ rps->power.mode = -1;
+ mutex_unlock(&rps->power.mutex);
+
+ intel_rps_set(rps, clamp(rps->cur_freq,
+ rps->min_freq_softlimit,
+ rps->max_freq_softlimit));
why are you resetting here?
I want to ensure the next calls to rps_set go past the "if (val ==
rps->last_freq)" and "if (new_power == rps->power.mode)" checks (second
one via gen6_rps_set_thresholds->rps_set_power" so new values are
immediately programmed into the hardware and sw state reset and
re-calculated.
Regards,
Tvrtko
