[PATCH v3 3/3] drm/i915: Add boot paramter to control rps boost at boot time.

deepak.s
2014-03-15T14:56:47Z

From: Deepak S <deepak.s@linux.intel.com>

We are adding a module paramter to control rps boost. By default, we
enable the boost for better performace. Based on the need (perf/power)
we can either enable/disable.

v2: Addressed rps default comment (Jani)

v3: Use bool to represent the boot parameter (Ville).

Signed-off-by: Deepak S <deepak.s@linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_gem.c | 2 +-
drivers/gpu/drm/i915/i915_params.c | 5 +++++
3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f23c258..6d91b1c 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2120,6 +2120,7 @@ struct i915_params {
bool prefault_disable;
bool reset;
bool disable_display;
+ bool enable_rps_boost;
};
extern struct i915_params i915 __read_mostly;

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 92b0b41..b9c52b8 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1042,7 +1042,7 @@ static int __wait_seqno(struct intel_ring_buffer *ring, u32 seqno,

timeout_expire = timeout ? jiffies + timespec_to_jiffies_timeout(timeout) : 0;

- if (INTEL_INFO(dev)->gen >= 6 && can_wait_boost(file_priv)) {
+ if (INTEL_INFO(dev)->gen >= 6 && can_wait_boost(file_priv) && i915.enable_rps_boost) {
gen6_rps_boost(dev_priv);
if (file_priv)
mod_delayed_work(dev_priv->wq,
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
index a66ffb6..772659f 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -49,6 +49,7 @@ struct i915_params i915 __read_mostly = {
.invert_brightness = 0,
.disable_display = 0,
.enable_cmd_parser = 0,
+ .enable_rps_boost = true,
};

module_param_named(modeset, i915.modeset, int, 0400);
@@ -162,3 +163,7 @@ MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
MODULE_PARM_DESC(enable_cmd_parser,
"Enable command parsing (1=enabled, 0=disabled [default])");
+
+module_param_named(enable_rps_boost, i915.enable_rps_boost, bool, 0600);
+MODULE_PARM_DESC(enable_rps_boost,
+ "Enable/Disable boost RPS frequency (default: true)");
--
1.8.4.2