[Intel-gfx] [PATCH] drm/i915: Removed the read of RP_STATE_CAP from sysfs/debugfs functions
akash.goel at intel.com
akash.goel at intel.com
Wed Feb 25 23:59:09 PST 2015
From: Akash Goel <akash.goel at intel.com>
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 debugfs/sysfs functions
and the values can be instead retrieved from the dev_priv->rps structure
when needed.
Signed-off-by: Akash Goel <akash.goel at intel.com>
---
drivers/gpu/drm/i915/i915_debugfs.c | 43 ++++++++++---------------------------
drivers/gpu/drm/i915/i915_sysfs.c | 39 ++++++++-------------------------
2 files changed, 20 insertions(+), 62 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 26e9c7b..4736b84 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1092,13 +1092,11 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
IS_BROADWELL(dev)) {
u32 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
u32 rp_state_limits = I915_READ(GEN6_RP_STATE_LIMITS);
- u32 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
u32 rpmodectl, rpinclimit, rpdeclimit;
u32 rpstat, cagf, reqf;
u32 rpupei, rpcurup, rpprevup;
u32 rpdownei, rpcurdown, rpprevdown;
u32 pm_ier, pm_imr, pm_isr, pm_iir, pm_mask;
- int max_freq;
/* RPSTAT1 is in the GT power well */
ret = mutex_lock_interruptible(&dev->struct_mutex);
@@ -1176,17 +1174,14 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
seq_printf(m, "RP PREV DOWN: %dus\n", rpprevdown &
GEN6_CURBSYTAVG_MASK);
- max_freq = (rp_state_cap & 0xff0000) >> 16;
seq_printf(m, "Lowest (RPN) frequency: %dMHz\n",
- intel_gpu_freq(dev_priv, max_freq));
+ intel_gpu_freq(dev_priv, dev_priv->rps.min_freq));
- max_freq = (rp_state_cap & 0xff00) >> 8;
seq_printf(m, "Nominal (RP1) frequency: %dMHz\n",
- intel_gpu_freq(dev_priv, max_freq));
+ intel_gpu_freq(dev_priv, dev_priv->rps.rp1_freq));
- max_freq = rp_state_cap & 0xff;
seq_printf(m, "Max non-overclocked (RP0) frequency: %dMHz\n",
- intel_gpu_freq(dev_priv, max_freq));
+ intel_gpu_freq(dev_priv, dev_priv->rps.rp0_freq));
seq_printf(m, "Max overclocked frequency: %dMHz\n",
intel_gpu_freq(dev_priv, dev_priv->rps.max_freq));
@@ -4191,7 +4186,7 @@ i915_max_freq_set(void *data, u64 val)
{
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)
@@ -4208,18 +4203,10 @@ i915_max_freq_set(void *data, u64 val)
/*
* Turbo will still be enabled, but won't go above the set value.
*/
- if (IS_VALLEYVIEW(dev)) {
- 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);
+ 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);
@@ -4266,7 +4253,7 @@ i915_min_freq_set(void *data, u64 val)
{
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)
@@ -4283,18 +4270,10 @@ i915_min_freq_set(void *data, u64 val)
/*
* 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);
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index cdc9da0..186ab95 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -487,38 +487,17 @@ static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr
struct drm_minor *minor = dev_to_drm_minor(kdev);
struct drm_device *dev = minor->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
- u32 val, rp_state_cap;
- ssize_t ret;
-
- ret = mutex_lock_interruptible(&dev->struct_mutex);
- if (ret)
- return ret;
- intel_runtime_pm_get(dev_priv);
- rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
- intel_runtime_pm_put(dev_priv);
- mutex_unlock(&dev->struct_mutex);
+ u32 val;
- if (attr == &dev_attr_gt_RP0_freq_mhz) {
- if (IS_VALLEYVIEW(dev))
- val = intel_gpu_freq(dev_priv, dev_priv->rps.rp0_freq);
- else
- val = intel_gpu_freq(dev_priv,
- ((rp_state_cap & 0x0000ff) >> 0));
- } else if (attr == &dev_attr_gt_RP1_freq_mhz) {
- if (IS_VALLEYVIEW(dev))
- val = intel_gpu_freq(dev_priv, dev_priv->rps.rp1_freq);
- else
- val = intel_gpu_freq(dev_priv,
- ((rp_state_cap & 0x00ff00) >> 8));
- } else if (attr == &dev_attr_gt_RPn_freq_mhz) {
- if (IS_VALLEYVIEW(dev))
- val = intel_gpu_freq(dev_priv, dev_priv->rps.min_freq);
- else
- val = intel_gpu_freq(dev_priv,
- ((rp_state_cap & 0xff0000) >> 16));
- } else {
+ if (attr == &dev_attr_gt_RP0_freq_mhz)
+ val = intel_gpu_freq(dev_priv, dev_priv->rps.rp0_freq);
+ else if (attr == &dev_attr_gt_RP1_freq_mhz)
+ val = intel_gpu_freq(dev_priv, dev_priv->rps.rp1_freq);
+ else if (attr == &dev_attr_gt_RPn_freq_mhz)
+ val = intel_gpu_freq(dev_priv, dev_priv->rps.min_freq);
+ else
BUG();
- }
+
return snprintf(buf, PAGE_SIZE, "%d\n", val);
}
--
1.9.2
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