On 7/10/2021 10:47 AM, Michal Wajdeczko wrote:
On 10.07.2021 03:20, Vinay Belgaumkar wrote:
Add param set h2g helpers to set the min and max frequencies
for use by SLPC.
Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@xxxxxxxxx>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 94 +++++++++++++++++++++
drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 2 +
2 files changed, 96 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
index e579408d1c19..19cb26479942 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
@@ -106,6 +106,19 @@ static int slpc_send(struct intel_guc_slpc *slpc,
return intel_guc_send(guc, action, in_len);
}
+static int host2guc_slpc_set_param(struct intel_guc_slpc *slpc,
+ u32 id, u32 value)
+{
+ struct slpc_event_input data = {0};
+
+ data.header.value = SLPC_EVENT(SLPC_EVENT_PARAMETER_SET, 2);
+ data.args[0] = id;
+ data.args[1] = value;
+
+ return slpc_send(slpc, &data, 4);
as suggested before, use of explicit function like:
static int guc_action_slpc_param(guc, u32 id, u32 value)
{
u32 request[] = {
INTEL_GUC_ACTION_SLPC_REQUEST,
SLPC_EVENT(SLPC_EVENT_PARAMETER_SET, 2),
id,
value,
};
return intel_guc_send(guc, request, ARRAY_SIZE(request));
}
will be simpler/cleaner
done.
+}
+
+
static bool slpc_running(struct intel_guc_slpc *slpc)
{
struct slpc_shared_data *data;
@@ -134,6 +147,19 @@ static int host2guc_slpc_query_task_state(struct intel_guc_slpc *slpc)
return slpc_send(slpc, &data, 4);
}
+static int slpc_set_param(struct intel_guc_slpc *slpc, u32 id, u32 value)
+{
+ struct drm_i915_private *i915 = slpc_to_i915(slpc);
+ GEM_BUG_ON(id >= SLPC_MAX_PARAM);
+
+ if (host2guc_slpc_set_param(slpc, id, value)) {
+ drm_err(&i915->drm, "Unable to set param %x", id);
missing \n
what about printing value to be set ?
what about printing send error %pe ?
done.
+ return -EIO;
+ }
+
+ return 0;
+}
+
static int slpc_read_task_state(struct intel_guc_slpc *slpc)
{
return host2guc_slpc_query_task_state(slpc);
@@ -218,6 +244,74 @@ int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
return slpc_shared_data_init(slpc);
}
+/**
+ * intel_guc_slpc_max_freq_set() - Set max frequency limit for SLPC.
+ * @slpc: pointer to intel_guc_slpc.
+ * @val: encoded frequency
what's the encoding ?
It should just be frequency (MHz).
+ *
+ * This function will invoke GuC SLPC action to update the max frequency
+ * limit for slice and unslice.
+ *
+ * Return: 0 on success, non-zero error code on failure.
+ */
+int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val)
+{
+ int ret;
+ struct drm_i915_private *i915 = slpc_to_i915(slpc);
+ intel_wakeref_t wakeref;
+
+ wakeref = intel_runtime_pm_get(&i915->runtime_pm);
use can use with_intel_runtime_pm(rpm, wakeref)
Ok.
+
+ ret = slpc_set_param(slpc,
+ SLPC_PARAM_GLOBAL_MAX_GT_UNSLICE_FREQ_MHZ,
+ val);
+
+ if (ret) {
+ drm_err(&i915->drm,
+ "Set max frequency unslice returned %d", ret);
missing \n
print error with %pe
but slpc_set_param returns only -EIO ;(
I was done that way so the sysfs method that calls it gets a standard
value. Will change that.
+ ret = -EIO;
+ goto done;
+ }
+
+done:
+ intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+ return ret;
+}
+
+/**
+ * intel_guc_slpc_min_freq_set() - Set min frequency limit for SLPC.
+ * @slpc: pointer to intel_guc_slpc.
+ * @val: encoded frequency
+ *
+ * This function will invoke GuC SLPC action to update the min frequency
+ * limit.
+ *
+ * Return: 0 on success, non-zero error code on failure.
+ */
+int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val)
+{
+ int ret;
+ struct intel_guc *guc = slpc_to_guc(slpc);
+ struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
+ intel_wakeref_t wakeref;
+
+ wakeref = intel_runtime_pm_get(&i915->runtime_pm);
+
+ ret = slpc_set_param(slpc,
+ SLPC_PARAM_GLOBAL_MIN_GT_UNSLICE_FREQ_MHZ,
+ val);
+ if (ret) {
+ drm_err(&i915->drm,
+ "Set min frequency for unslice returned %d", ret);
as above
done.
Thanks,
Vinay.
Michal
+ ret = -EIO;
+ goto done;
+ }
+
+done:
+ intel_runtime_pm_put(&i915->runtime_pm, wakeref);
+ return ret;
+}
+
/*
* intel_guc_slpc_enable() - Start SLPC
* @slpc: pointer to intel_guc_slpc.
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
index a2643b904165..a473e1ea7c10 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
@@ -34,5 +34,7 @@ struct intel_guc_slpc {
int intel_guc_slpc_init(struct intel_guc_slpc *slpc);
int intel_guc_slpc_enable(struct intel_guc_slpc *slpc);
void intel_guc_slpc_fini(struct intel_guc_slpc *slpc);
+int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val);
+int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val);
#endif
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