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| author | Ben Widawsky <ben@bwidawsk.net> | 2012-09-07 19:43:44 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-09-20 14:23:06 +0200 |
| commit | ac6ae347a50bfb4667438272c0d48f4fd41154db (patch) | |
| tree | 6ef95fb6880a1235b32040740e8bb8783280124e /drivers/gpu/drm/i915 | |
| parent | 46ddf194776500e132693dd2c11b28a971070cc0 (diff) | |
| download | blackbird-op-linux-ac6ae347a50bfb4667438272c0d48f4fd41154db.tar.gz blackbird-op-linux-ac6ae347a50bfb4667438272c0d48f4fd41154db.zip | |
drm/i915: Show render P state thresholds in sysfs
This is useful for userspace utilities which wish to use the previous
interface, specifically for micromanaging the increase/decrease steps by
setting min == max.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_sysfs.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c index 1ffb9880d64c..a25351519397 100644 --- a/drivers/gpu/drm/i915/i915_sysfs.c +++ b/drivers/gpu/drm/i915/i915_sysfs.c @@ -338,10 +338,46 @@ static DEVICE_ATTR(gt_cur_freq_mhz, S_IRUGO, gt_cur_freq_mhz_show, NULL); static DEVICE_ATTR(gt_max_freq_mhz, S_IRUGO | S_IWUSR, gt_max_freq_mhz_show, gt_max_freq_mhz_store); static DEVICE_ATTR(gt_min_freq_mhz, S_IRUGO | S_IWUSR, gt_min_freq_mhz_show, gt_min_freq_mhz_store); + +static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf); +static DEVICE_ATTR(gt_RP0_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); +static DEVICE_ATTR(gt_RP1_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); +static DEVICE_ATTR(gt_RPn_freq_mhz, S_IRUGO, gt_rp_mhz_show, NULL); + +/* For now we have a static number of RP states */ +static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr, char *buf) +{ + struct drm_minor *minor = container_of(kdev, struct 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; + rp_state_cap = I915_READ(GEN6_RP_STATE_CAP); + mutex_unlock(&dev->struct_mutex); + + if (attr == &dev_attr_gt_RP0_freq_mhz) { + val = ((rp_state_cap & 0x0000ff) >> 0) * GT_FREQUENCY_MULTIPLIER; + } else if (attr == &dev_attr_gt_RP1_freq_mhz) { + val = ((rp_state_cap & 0x00ff00) >> 8) * GT_FREQUENCY_MULTIPLIER; + } else if (attr == &dev_attr_gt_RPn_freq_mhz) { + val = ((rp_state_cap & 0xff0000) >> 16) * GT_FREQUENCY_MULTIPLIER; + } else { + BUG(); + } + return snprintf(buf, PAGE_SIZE, "%d", val); +} + static const struct attribute *gen6_attrs[] = { &dev_attr_gt_cur_freq_mhz.attr, &dev_attr_gt_max_freq_mhz.attr, &dev_attr_gt_min_freq_mhz.attr, + &dev_attr_gt_RP0_freq_mhz.attr, + &dev_attr_gt_RP1_freq_mhz.attr, + &dev_attr_gt_RPn_freq_mhz.attr, NULL, }; |
