drm/i915: Removed the read of RP_STATE_CAP from sysfs/debugfs functions
The frequency values(Rp0, Rp1, Rpn) reported by RP_STATE_CAP register
are stored, initially by the Driver, inside the dev_priv->rps structure.
Since these values are expected to remain same throughout, there is no real
need to read this register, on dynamic basis, from certain debugfs/sysfs
functions and the values can be instead retrieved from the dev_priv->rps
structure when needed.
For the i915_frequency_info debugfs interface, the frequency values from the
RP_STATE_CAP register only should be used, to indicate the actual Hw state,
since it is principally used for the debugging purpose.
v2: Reverted the changes in i915_frequency_info function, to continue report
back the frequency values, as per the actual Hw state (Chris)
Signed-off-by: Akash Goel <akash.goel@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 843b471..81e27d4 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4180,7 +4180,7 @@
{
struct drm_device *dev = data;
struct drm_i915_private *dev_priv = dev->dev_private;
- u32 rp_state_cap, hw_max, hw_min;
+ u32 hw_max, hw_min;
int ret;
if (INTEL_INFO(dev)->gen < 6)
@@ -4197,18 +4197,10 @@
/*
* Turbo will still be enabled, but won't go above the set value.
*/
- if (IS_VALLEYVIEW(dev)) {
- val = intel_freq_opcode(dev_priv, val);
+ val = intel_freq_opcode(dev_priv, val);
- hw_max = dev_priv->rps.max_freq;
- hw_min = dev_priv->rps.min_freq;
- } else {
- val = intel_freq_opcode(dev_priv, val);
-
- rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
- hw_max = dev_priv->rps.max_freq;
- hw_min = (rp_state_cap >> 16) & 0xff;
- }
+ hw_max = dev_priv->rps.max_freq;
+ hw_min = dev_priv->rps.min_freq;
if (val < hw_min || val > hw_max || val < dev_priv->rps.min_freq_softlimit) {
mutex_unlock(&dev_priv->rps.hw_lock);
@@ -4255,7 +4247,7 @@
{
struct drm_device *dev = data;
struct drm_i915_private *dev_priv = dev->dev_private;
- u32 rp_state_cap, hw_max, hw_min;
+ u32 hw_max, hw_min;
int ret;
if (INTEL_INFO(dev)->gen < 6)
@@ -4272,18 +4264,10 @@
/*
* Turbo will still be enabled, but won't go below the set value.
*/
- if (IS_VALLEYVIEW(dev)) {
- val = intel_freq_opcode(dev_priv, val);
+ val = intel_freq_opcode(dev_priv, val);
- hw_max = dev_priv->rps.max_freq;
- hw_min = dev_priv->rps.min_freq;
- } else {
- val = intel_freq_opcode(dev_priv, val);
-
- rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
- hw_max = dev_priv->rps.max_freq;
- hw_min = (rp_state_cap >> 16) & 0xff;
- }
+ hw_max = dev_priv->rps.max_freq;
+ hw_min = dev_priv->rps.min_freq;
if (val < hw_min || val > hw_max || val > dev_priv->rps.max_freq_softlimit) {
mutex_unlock(&dev_priv->rps.hw_lock);