From a210b028f07690c127733addbbe137e8f4cad30c Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Mon, 26 Nov 2012 17:22:08 +0100 Subject: [PATCH] drm/i915: replace ad-hoc dual-link lvds checks ... with is_dual_link_lvds introduced in commit b03543857fd75876b96e10d4320b775e95041bb7 Author: Takashi Iwai 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 ... Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- 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 55d3e3dbc137..be19b6d1ca52 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; @@ -5359,7 +5356,7 @@ 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; -- 2.20.1