drm/i915/debugfs: add a separate debugfs file for VBT

In the future the VBT might not be in mailbox #4 of the ACPI OpRegion,
thus unavailable in i915_opregion, so add a separate file for the VBT.

v2: Drop the locking as unneeded (Chris)
v3: Rebase

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1450178232-27780-1-git-send-email-jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index a9e1f18..0fc38bb 100644 (file)
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1857,6 +1857,19 @@ out:
        return 0;
 }
 
+static int i915_vbt(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_opregion *opregion = &dev_priv->opregion;
+
+       if (opregion->vbt)
+               seq_write(m, opregion->vbt, opregion->vbt_size);
+
+       return 0;
+}
+
 static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
 {
        struct drm_info_node *node = m->private;
@@ -5325,6 +5338,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
        {"i915_ips_status", i915_ips_status, 0},
        {"i915_sr_status", i915_sr_status, 0},
        {"i915_opregion", i915_opregion, 0},
+       {"i915_vbt", i915_vbt, 0},
        {"i915_gem_framebuffer", i915_gem_framebuffer_info, 0},
        {"i915_context_status", i915_context_status, 0},
        {"i915_dump_lrc", i915_dump_lrc, 0},

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 10e4716..ca8c2a6 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -458,6 +458,7 @@ struct intel_opregion {
        u32 swsci_sbcb_sub_functions;
        struct opregion_asle *asle;
        const void *vbt;
+       u32 vbt_size;
        u32 *lid_state;
        struct work_struct asle_work;
 };

diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index e1795de..53164a0 100644 (file)
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -993,6 +993,7 @@ int intel_opregion_setup(struct drm_device *dev)
                if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
                        DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion\n");
                        opregion->vbt = vbt;
+                       opregion->vbt_size = vbt_size;
                }
        }