From bedd4dba75dc583fd3c458f6af2d53c60912a3cb Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Fri, 22 Aug 2014 15:04:13 +0300 Subject: [PATCH] drm/i915: improve assert_panel_unlocked MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Fix assert_panel_unlocked for vlv/chv, and improve it a bit for non-LVDS. Also don't pretend it works for DDI. There's still work to do to get this right for eDP on PCH platforms, but this is a start. v2: WARN_ON(HAS_DDI) Reviewed-by: Ville Syrjälä Signed-off-by: Jani Nikula Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 8245fe51994a..794aa5e611eb 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1195,17 +1195,33 @@ void assert_fdi_rx_pll(struct drm_i915_private *dev_priv, static void assert_panel_unlocked(struct drm_i915_private *dev_priv, enum pipe pipe) { - int pp_reg, lvds_reg; + struct drm_device *dev = dev_priv->dev; + int pp_reg; u32 val; enum pipe panel_pipe = PIPE_A; bool locked = true; - if (HAS_PCH_SPLIT(dev_priv->dev)) { + if (WARN_ON(HAS_DDI(dev))) + return; + + if (HAS_PCH_SPLIT(dev)) { + u32 port_sel; + pp_reg = PCH_PP_CONTROL; - lvds_reg = PCH_LVDS; + port_sel = I915_READ(PCH_PP_ON_DELAYS) & PANEL_PORT_SELECT_MASK; + + if (port_sel == PANEL_PORT_SELECT_LVDS && + I915_READ(PCH_LVDS) & LVDS_PIPEB_SELECT) + panel_pipe = PIPE_B; + /* XXX: else fix for eDP */ + } else if (IS_VALLEYVIEW(dev)) { + /* presumably write lock depends on pipe, not port select */ + pp_reg = VLV_PIPE_PP_CONTROL(pipe); + panel_pipe = pipe; } else { pp_reg = PP_CONTROL; - lvds_reg = LVDS; + if (I915_READ(LVDS) & LVDS_PIPEB_SELECT) + panel_pipe = PIPE_B; } val = I915_READ(pp_reg); @@ -1213,9 +1229,6 @@ static void assert_panel_unlocked(struct drm_i915_private *dev_priv, ((val & PANEL_UNLOCK_MASK) == PANEL_UNLOCK_REGS)) locked = false; - if (I915_READ(lvds_reg) & LVDS_PIPEB_SELECT) - panel_pipe = PIPE_B; - WARN(panel_pipe == pipe && locked, "panel assertion failure, pipe %c regs locked\n", pipe_name(pipe)); -- 2.39.2