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>

diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index 37e9a96777efa5351a5d7cdf1ce5acd959cd1ea4..68459605bd12afa8d89970a4fee472f4d4866c6a 100644 (file)
--- 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... */