drm/i915: demote opregion excessive timeout WARN_ONCE to DRM_INFO_ONCE

The WARN_ONCE is a bit too verbose, make it a DRM_INFO_ONCE.

While at it, add a #define for MAX_DSLP and make the message a bit more
informative.

v2: use DRM_INFO_ONCE, add MAX_DSLP, pimp the message.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index 37e9a96777ef..68459605bd12 100644
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -227,6 +227,8 @@ struct opregion_asle {
 #define ACPI_DIGITAL_OUTPUT (3<<8)
 #define ACPI_LVDS_OUTPUT (4<<8)
 
+#define MAX_DSLP        1500
+
 #ifdef CONFIG_ACPI
 static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
 {
@@ -261,10 +263,11 @@ static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
                 /* The spec says 2ms should be the default, but it's too small
                  * for some machines. */
                 dslp = 50;
-        } else if (dslp > 500) {
+        } else if (dslp > MAX_DSLP) {
                 /* Hey bios, trust must be earned. */
-                WARN_ONCE(1, "excessive driver sleep timeout (DSPL) %u\n", dslp);
-                dslp = 500;
+                DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
+                              "using %u ms instead\n", dslp, MAX_DSLP);
+                dslp = MAX_DSLP;
         }
 
         /* The spec tells us to do this, but we are the only user... */