... with is_dual_link_lvds introduced in
commit b03543857fd75876b96e10d4320b775e95041bb7
Author: Takashi Iwai <tiwai at suse.de>
Date: Tue Mar 20 13:07:05 2012 +0100
drm/i915: Check VBIOS value for determining LVDS dual channel mode, too
All these checks predate this commit and have simply been overlooked.
Since we don't support switching between single-link and dual-link
modes anyway, this different checks could at best only get in the way
of refactorings, and in the worst case cause inconsistencies.
v2: Update the comment, we now have a solid way to figure out whether
we need dual-link lvds or not (falling back to vbt values as a last
resort). We still don't know how to switch between dual-link and
single link so leave that part intact. I'm not sure though whether
switching between these two modes makes any sense - we always drive
the panel at its fixed mode (with a fixed bpc) anyway ...
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/i915/intel_display.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 647f16e..dd4cb43 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -690,13 +690,11 @@ intel_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
intel_clock_t clock;
int err = target;
- if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
- (I915_READ(LVDS)) != 0) {
+ if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)) {
/*
- * For LVDS, if the panel is on, just rely on its current
- * settings for dual-channel. We haven't figured out how to
- * reliably set up different single/dual channel state, if we
- * even can.
+ * For LVDS just rely on its current settings for dual-channel.
+ * We haven't figured out how to reliably set up different
+ * single/dual channel state, if we even can.
*/
if (is_dual_link_lvds(dev_priv, LVDS))
clock.p2 = limit->p2.p2_fast;
@@ -766,8 +764,7 @@ intel_g4x_find_best_PLL(const intel_limit_t *limit, struct drm_crtc *crtc,
lvds_reg = PCH_LVDS;
else
lvds_reg = LVDS;
- if ((I915_READ(lvds_reg) & LVDS_CLKB_POWER_MASK) ==
- LVDS_CLKB_POWER_UP)
+ if (is_dual_link_lvds(dev_priv, lvds_reg))
clock.p2 = limit->p2.p2_fast;
else
clock.p2 = limit->p2.p2_slow;
@@ -5357,7 +5354,7 @@ static uint32_t ironlake_compute_dpll(struct intel_crtc *intel_crtc,
if (is_lvds) {
if ((intel_panel_use_ssc(dev_priv) &&
dev_priv->lvds_ssc_freq == 100) ||
- (I915_READ(PCH_LVDS) & LVDS_CLKB_POWER_MASK) == LVDS_CLKB_POWER_UP)
+ is_dual_link_lvds(dev_priv, PCH_LVDS))
factor = 25;
} else if (is_sdvo && is_tv)
factor = 20;
--
1.7.11.7
