drm/i915/skl: Print the DMC firmware status in debugfs

Create a new debufs file for it, we'll have a few more things to add
there.

v2: Fix checkpatch warning about static const array
v3: use named initializers (Ville)
v4: strip out csr_state as it will be removed in future (Ville, Imre)

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> (v1)
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1445950025-5793-3-git-send-email-mika.kuoppala@intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
Tested-by: Daniel Stone <daniels@collabora.com> # SKL
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 8436e37..847753d 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2788,6 +2788,32 @@ static int i915_power_domain_info(struct seq_file *m, void *unused)
        return 0;
 }
 
+static int i915_dmc_info(struct seq_file *m, void *unused)
+{
+       struct drm_info_node *node = m->private;
+       struct drm_device *dev = node->minor->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       struct intel_csr *csr;
+
+       if (!HAS_CSR(dev)) {
+               seq_puts(m, "not supported\n");
+               return 0;
+       }
+
+       csr = &dev_priv->csr;
+
+       seq_printf(m, "fw loaded: %s\n", yesno(csr->dmc_payload != NULL));
+       seq_printf(m, "path: %s\n", csr->fw_path);
+
+       if (!csr->dmc_payload)
+               return 0;
+
+       seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
+                  CSR_VERSION_MINOR(csr->version));
+
+       return 0;
+}
+
 static void intel_seq_print_mode(struct seq_file *m, int tabs,
                                 struct drm_display_mode *mode)
 {
@@ -5352,6 +5378,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
        {"i915_energy_uJ", i915_energy_uJ, 0},
        {"i915_runtime_pm_status", i915_runtime_pm_status, 0},
        {"i915_power_domain_info", i915_power_domain_info, 0},
+       {"i915_dmc_info", i915_dmc_info, 0},
        {"i915_display_info", i915_display_info, 0},
        {"i915_semaphore_status", i915_semaphore_status, 0},
        {"i915_shared_dplls_info", i915_shared_dplls_info, 0},