diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2015-06-24 22:00:09 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-06-29 10:59:48 +0200 |
| commit | de38b95cbb2a92ea037c22d41fc1476c0825c0d7 (patch) | |
| tree | a6e7324aecf24ad49c86fbfe3bec03f5db674721 /drivers/gpu/drm/i915/i915_debugfs.c | |
| parent | 6f9c784b7ec2cc9fc9fd7c5a8634b70aadd76015 (diff) | |
| download | lwn-de38b95cbb2a92ea037c22d41fc1476c0825c0d7.tar.gz lwn-de38b95cbb2a92ea037c22d41fc1476c0825c0d7.zip | |
drm/i915: Add debugfs knobs for VLVCHV memory latency values
Allow tweaking the VLV/CHV memory latencies thorugh sysfs, like we do
for ILK+.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Clint Taylor <Clinton.A.Taylor@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 7d303e721a77..68a5e868f90b 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -4203,8 +4203,15 @@ static const struct file_operations i915_displayport_test_type_fops = { static void wm_latency_show(struct seq_file *m, const uint16_t wm[8]) { struct drm_device *dev = m->private; - int num_levels = ilk_wm_max_level(dev) + 1; int level; + int num_levels; + + if (IS_CHERRYVIEW(dev)) + num_levels = 3; + else if (IS_VALLEYVIEW(dev)) + num_levels = 1; + else + num_levels = ilk_wm_max_level(dev) + 1; drm_modeset_lock_all(dev); @@ -4213,9 +4220,9 @@ static void wm_latency_show(struct seq_file *m, const uint16_t wm[8]) /* * - WM1+ latency values in 0.5us units - * - latencies are in us on gen9 + * - latencies are in us on gen9/vlv/chv */ - if (INTEL_INFO(dev)->gen >= 9) + if (INTEL_INFO(dev)->gen >= 9 || IS_VALLEYVIEW(dev)) latency *= 10; else if (level > 0) latency *= 5; @@ -4279,7 +4286,7 @@ static int pri_wm_latency_open(struct inode *inode, struct file *file) { struct drm_device *dev = inode->i_private; - if (HAS_GMCH_DISPLAY(dev)) + if (INTEL_INFO(dev)->gen < 5) return -ENODEV; return single_open(file, pri_wm_latency_show, dev); @@ -4311,11 +4318,18 @@ static ssize_t wm_latency_write(struct file *file, const char __user *ubuf, struct seq_file *m = file->private_data; struct drm_device *dev = m->private; uint16_t new[8] = { 0 }; - int num_levels = ilk_wm_max_level(dev) + 1; + int num_levels; int level; int ret; char tmp[32]; + if (IS_CHERRYVIEW(dev)) + num_levels = 3; + else if (IS_VALLEYVIEW(dev)) + num_levels = 1; + else + num_levels = ilk_wm_max_level(dev) + 1; + if (len >= sizeof(tmp)) return -EINVAL; |