From 434ed097245423c5ea277d18121c0fad0df42abf Mon Sep 17 00:00:00 2001
From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Tue, 7 Sep 2010 14:48:06 -0700
Subject: [PATCH] drm/i915: set dither bits on eDP panels too
We really need a macro to test whether a given connector has a panel
attached rather than sprinkling HAS_PCH_SPLIT/IS_eDP/has_edp_encoder
etc all over. In the meantime, fix the bug...
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[ickle: tidy up the duplicity in the conditionals]
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/intel_display.c | 35 ++++++++++++++--------------
1 file changed, 17 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 948a3608d1bd..4b23646304df 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3909,11 +3909,6 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
udelay(150);
}
- if (HAS_PCH_SPLIT(dev)) {
- pipeconf &= ~PIPECONF_DITHER_EN;
- pipeconf &= ~PIPECONF_DITHER_TYPE_MASK;
- }
-
/* The LVDS pin pair needs to be on before the DPLLs are enabled.
* This is an exception to the general rule that mode_set doesn't turn
* things on.
@@ -3951,23 +3946,27 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
* appropriately here, but we need to look more thoroughly into how
* panels behave in the two modes.
*/
- /* set the dithering flag */
- if (IS_I965G(dev)) {
- if (dev_priv->lvds_dither) {
- if (HAS_PCH_SPLIT(dev)) {
- pipeconf |= PIPECONF_DITHER_EN;
- pipeconf |= PIPECONF_DITHER_TYPE_ST1;
- } else
- lvds |= LVDS_ENABLE_DITHER;
- } else {
- if (!HAS_PCH_SPLIT(dev)) {
- lvds &= ~LVDS_ENABLE_DITHER;
- }
- }
+ /* set the dithering flag on non-PCH LVDS as needed */
+ if (IS_I965G(dev) && !HAS_PCH_SPLIT(dev)) {
+ if (dev_priv->lvds_dither)
+ lvds |= LVDS_ENABLE_DITHER;
+ else
+ lvds &= ~LVDS_ENABLE_DITHER;
}
I915_WRITE(lvds_reg, lvds);
I915_READ(lvds_reg);
}
+
+ /* set the dithering flag and clear for anything other than a panel. */
+ if (HAS_PCH_SPLIT(dev)) {
+ pipeconf &= ~PIPECONF_DITHER_EN;
+ pipeconf &= ~PIPECONF_DITHER_TYPE_MASK;
+ if (dev_priv->lvds_dither && (is_lvds || has_edp_encoder)) {
+ pipeconf |= PIPECONF_DITHER_EN;
+ pipeconf |= PIPECONF_DITHER_TYPE_ST1;
+ }
+ }
+
if (is_dp)
intel_dp_set_m_n(crtc, mode, adjusted_mode);
else if (HAS_PCH_SPLIT(dev)) {
--
2.34.1