The code is too specific and detailed to have open in a high level
function. Abstract away. As a drive-by improvement switch to using
enableddisabled() in logging and git rid of a redundant !!. No
functional changes.
v2: drop the !! while at it too (Chris)
Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 39 +++++++++++---------
1 file changed, 22 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index 538a33adbc0e..9e68df8a9945 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -7552,6 +7552,27 @@ intel_link_compute_m_n(u16 bits_per_pixel, int nlanes,
constant_n);
}
+static void intel_panel_sanitize_ssc(struct drm_i915_private *dev_priv)
+{
+ /*
+ * There may be no VBT; and if the BIOS enabled SSC we can
+ * just keep using it to avoid unnecessary flicker. Whereas if the
+ * BIOS isn't using it, don't assume it will work even if the VBT
+ * indicates as much.
+ */
+ if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
+ bool bios_lvds_use_ssc = I915_READ(PCH_DREF_CONTROL) &
+ DREF_SSC1_ENABLE;
+
+ if (dev_priv->vbt.lvds_use_ssc != bios_lvds_use_ssc) {
+ DRM_DEBUG_KMS("SSC %s by BIOS, overriding VBT which
says %s\n",
+ enableddisabled(bios_lvds_use_ssc),
+
enableddisabled(dev_priv->vbt.lvds_use_ssc));
+ dev_priv->vbt.lvds_use_ssc = bios_lvds_use_ssc;
+ }
+ }
+}
+
static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
{
if (i915_modparams.panel_use_ssc >= 0)
@@ -16165,23 +16186,7 @@ int intel_modeset_init(struct drm_device *dev)
intel_init_pm(dev_priv);
- /*
- * There may be no VBT; and if the BIOS enabled SSC we can
- * just keep using it to avoid unnecessary flicker. Whereas if the
- * BIOS isn't using it, don't assume it will work even if the VBT
- * indicates as much.
- */
- if (HAS_PCH_IBX(dev_priv) || HAS_PCH_CPT(dev_priv)) {
- bool bios_lvds_use_ssc = !!(I915_READ(PCH_DREF_CONTROL) &
- DREF_SSC1_ENABLE);
-
- if (dev_priv->vbt.lvds_use_ssc != bios_lvds_use_ssc) {
- DRM_DEBUG_KMS("SSC %sabled by BIOS, overriding VBT
which says %sabled\n",
- bios_lvds_use_ssc ? "en" : "dis",
- dev_priv->vbt.lvds_use_ssc ? "en" : "dis");
- dev_priv->vbt.lvds_use_ssc = bios_lvds_use_ssc;
- }
- }
+ intel_panel_sanitize_ssc(dev_priv);
/*
* Maximum framebuffer dimensions, chosen to match
--
2.20.1
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