drm/i915/skl: Augment the latency debugfs files for SKL

v2: Use the gen >= 9 in the debugfs file condition (Ville)

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
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 0a69813..b1cbfbf 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3523,7 +3523,7 @@ static const struct file_operations i915_display_crc_ctl_fops = {
        .write = display_crc_ctl_write
 };
 
-static void wm_latency_show(struct seq_file *m, const uint16_t wm[5])
+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;
@@ -3534,13 +3534,17 @@ static void wm_latency_show(struct seq_file *m, const uint16_t wm[5])
        for (level = 0; level < num_levels; level++) {
                unsigned int latency = wm[level];
 
-               /* WM1+ latency values in 0.5us units */
-               if (level > 0)
+               /*
+                * - WM1+ latency values in 0.5us units
+                * - latencies are in us on gen9
+                */
+               if (INTEL_INFO(dev)->gen >= 9)
+                       latency *= 10;
+               else if (level > 0)
                        latency *= 5;
 
                seq_printf(m, "WM%d %u (%u.%u usec)\n",
-                          level, wm[level],
-                          latency / 10, latency % 10);
+                          level, wm[level], latency / 10, latency % 10);
        }
 
        drm_modeset_unlock_all(dev);
@@ -3549,8 +3553,15 @@ static void wm_latency_show(struct seq_file *m, const uint16_t wm[5])
 static int pri_wm_latency_show(struct seq_file *m, void *data)
 {
        struct drm_device *dev = m->private;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       const uint16_t *latencies;
+
+       if (INTEL_INFO(dev)->gen >= 9)
+               latencies = dev_priv->wm.skl_latency;
+       else
+               latencies = to_i915(dev)->wm.pri_latency;
 
-       wm_latency_show(m, to_i915(dev)->wm.pri_latency);
+       wm_latency_show(m, latencies);
 
        return 0;
 }
@@ -3558,8 +3569,15 @@ static int pri_wm_latency_show(struct seq_file *m, void *data)
 static int spr_wm_latency_show(struct seq_file *m, void *data)
 {
        struct drm_device *dev = m->private;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       const uint16_t *latencies;
+
+       if (INTEL_INFO(dev)->gen >= 9)
+               latencies = dev_priv->wm.skl_latency;
+       else
+               latencies = to_i915(dev)->wm.spr_latency;
 
-       wm_latency_show(m, to_i915(dev)->wm.spr_latency);
+       wm_latency_show(m, latencies);
 
        return 0;
 }
@@ -3567,8 +3585,15 @@ static int spr_wm_latency_show(struct seq_file *m, void *data)
 static int cur_wm_latency_show(struct seq_file *m, void *data)
 {
        struct drm_device *dev = m->private;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       const uint16_t *latencies;
+
+       if (INTEL_INFO(dev)->gen >= 9)
+               latencies = dev_priv->wm.skl_latency;
+       else
+               latencies = to_i915(dev)->wm.cur_latency;
 
-       wm_latency_show(m, to_i915(dev)->wm.cur_latency);
+       wm_latency_show(m, latencies);
 
        return 0;
 }
@@ -3604,11 +3629,11 @@ static int cur_wm_latency_open(struct inode *inode, struct file *file)
 }
 
 static ssize_t wm_latency_write(struct file *file, const char __user *ubuf,
-                               size_t len, loff_t *offp, uint16_t wm[5])
+                               size_t len, loff_t *offp, uint16_t wm[8])
 {
        struct seq_file *m = file->private_data;
        struct drm_device *dev = m->private;
-       uint16_t new[5] = { 0 };
+       uint16_t new[8] = { 0 };
        int num_levels = ilk_wm_max_level(dev) + 1;
        int level;
        int ret;
@@ -3622,7 +3647,9 @@ static ssize_t wm_latency_write(struct file *file, const char __user *ubuf,
 
        tmp[len] = '\0';
 
-       ret = sscanf(tmp, "%hu %hu %hu %hu %hu", &new[0], &new[1], &new[2], &new[3], &new[4]);
+       ret = sscanf(tmp, "%hu %hu %hu %hu %hu %hu %hu %hu",
+                    &new[0], &new[1], &new[2], &new[3],
+                    &new[4], &new[5], &new[6], &new[7]);
        if (ret != num_levels)
                return -EINVAL;
 
@@ -3642,8 +3669,15 @@ static ssize_t pri_wm_latency_write(struct file *file, const char __user *ubuf,
 {
        struct seq_file *m = file->private_data;
        struct drm_device *dev = m->private;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       uint16_t *latencies;
 
-       return wm_latency_write(file, ubuf, len, offp, to_i915(dev)->wm.pri_latency);
+       if (INTEL_INFO(dev)->gen >= 9)
+               latencies = dev_priv->wm.skl_latency;
+       else
+               latencies = to_i915(dev)->wm.pri_latency;
+
+       return wm_latency_write(file, ubuf, len, offp, latencies);
 }
 
 static ssize_t spr_wm_latency_write(struct file *file, const char __user *ubuf,
@@ -3651,8 +3685,15 @@ static ssize_t spr_wm_latency_write(struct file *file, const char __user *ubuf,
 {
        struct seq_file *m = file->private_data;
        struct drm_device *dev = m->private;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       uint16_t *latencies;
 
-       return wm_latency_write(file, ubuf, len, offp, to_i915(dev)->wm.spr_latency);
+       if (INTEL_INFO(dev)->gen >= 9)
+               latencies = dev_priv->wm.skl_latency;
+       else
+               latencies = to_i915(dev)->wm.spr_latency;
+
+       return wm_latency_write(file, ubuf, len, offp, latencies);
 }
 
 static ssize_t cur_wm_latency_write(struct file *file, const char __user *ubuf,
@@ -3660,8 +3701,15 @@ static ssize_t cur_wm_latency_write(struct file *file, const char __user *ubuf,
 {
        struct seq_file *m = file->private_data;
        struct drm_device *dev = m->private;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       uint16_t *latencies;
+
+       if (INTEL_INFO(dev)->gen >= 9)
+               latencies = dev_priv->wm.skl_latency;
+       else
+               latencies = to_i915(dev)->wm.cur_latency;
 
-       return wm_latency_write(file, ubuf, len, offp, to_i915(dev)->wm.cur_latency);
+       return wm_latency_write(file, ubuf, len, offp, latencies);
 }
 
 static const struct file_operations i915_pri_wm_latency_fops = {