From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Double wide mode is only available on pipe A, except on GDG where
pipe B is also double wide capable.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ee777a7..70f9fc2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4150,10 +4150,10 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
* Enable pixel doubling when the dot clock
* is > 90% of the (display) core speed.
*
- * XXX: No double-wide on 915GM pipe B. Is that
- * the only reason for the pipe == PIPE_A check?
+ * GDG double wide on either pipe,
+ * otherwise pipe A only.
*/
- if (crtc->pipe == PIPE_A &&
+ if ((crtc->pipe == PIPE_A || IS_I915G(dev)) &&
adjusted_mode->clock > clock_limit * 9 / 10) {
clock_limit *= 2;
pipe_config->double_wide = true;
--
1.8.1.5
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