drm/i915/bdw: Export workaround data to debugfs

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / i915 / i915_debugfs.c

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 9d93af126f9cb0ed24f36ccfe01a41de0add2a30..1467cc1a47a9f57c857b669a2529cb3df519be62 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2628,6 +2628,45 @@ static int i915_shared_dplls_info(struct seq_file *m, void *unused)
        return 0;
 }
 
+static int intel_wa_registers(struct seq_file *m, void *unused)
+{
+       int i;
+       int ret;
+       struct drm_info_node *node = (struct drm_info_node *) m->private;
+       struct drm_device *dev = node->minor->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+
+       if (!IS_BROADWELL(dev)) {
+               DRM_DEBUG_DRIVER("Workaround table not available !!\n");
+               return -EINVAL;
+       }
+
+       ret = mutex_lock_interruptible(&dev->struct_mutex);
+       if (ret)
+               return ret;
+
+       intel_runtime_pm_get(dev_priv);
+
+       seq_printf(m, "Workarounds applied: %d\n", dev_priv->num_wa_regs);
+       for (i = 0; i < dev_priv->num_wa_regs; ++i) {
+               u32 addr, mask;
+
+               addr = dev_priv->intel_wa_regs[i].addr;
+               mask = dev_priv->intel_wa_regs[i].mask;
+               dev_priv->intel_wa_regs[i].value = I915_READ(addr) | mask;
+               if (dev_priv->intel_wa_regs[i].addr)
+                       seq_printf(m, "0x%X: 0x%08X, mask: 0x%08X\n",
+                                  dev_priv->intel_wa_regs[i].addr,
+                                  dev_priv->intel_wa_regs[i].value,
+                                  dev_priv->intel_wa_regs[i].mask);
+       }
+
+       intel_runtime_pm_put(dev_priv);
+       mutex_unlock(&dev->struct_mutex);
+
+       return 0;
+}
+
 struct pipe_crc_info {
        const char *name;
        struct drm_device *dev;
@@ -4159,6 +4198,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
        {"i915_semaphore_status", i915_semaphore_status, 0},
        {"i915_shared_dplls_info", i915_shared_dplls_info, 0},
        {"i915_dp_mst_info", i915_dp_mst_info, 0},
+       {"intel_wa_registers", intel_wa_registers, 0}
 };
 #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)