From 01a551971c0fb1739dbe61f60105323a1f8827ad Mon Sep 17 00:00:00 2001 From: Rodrigo Vivi Date: Thu, 17 Nov 2016 11:17:36 -0800 Subject: [PATCH] drm/i915: Only poll DW3_A when init DDI PHY for ports B and C. According to Bspec we need to "Poll for PORT_REF_DW3_A grc_done == 1b" only on ports B and C initialization sequence when copying rcomp from port A. So let's follow the spec and only poll for that case and not on every port A initialization. v2: Also remove the grc_done check from bxt_ddi_phy_is_enabled() otherwise it might believe it is disabled and force it to re program. Cc: Imre Deak Cc: Ander Conselvan de Oliveira Signed-off-by: Rodrigo Vivi Reviewed-by: Imre Deak Link: http://patchwork.freedesktop.org/patch/msgid/1479410256-25735-1-git-send-email-rodrigo.vivi@intel.com --- drivers/gpu/drm/i915/intel_dpio_phy.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dpio_phy.c b/drivers/gpu/drm/i915/intel_dpio_phy.c index 46e38a05b3ac..09b670929786 100644 --- a/drivers/gpu/drm/i915/intel_dpio_phy.c +++ b/drivers/gpu/drm/i915/intel_dpio_phy.c @@ -328,14 +328,6 @@ bool bxt_ddi_phy_is_enabled(struct drm_i915_private *dev_priv, return false; } - if (phy_info->rcomp_phy == -1 && - !(I915_READ(BXT_PORT_REF_DW3(phy)) & GRC_DONE)) { - DRM_DEBUG_DRIVER("DDI PHY %d powered, but GRC isn't done\n", - phy); - - return false; - } - if (!(I915_READ(BXT_PHY_CTL_FAMILY(phy)) & COMMON_RESET_DIS)) { DRM_DEBUG_DRIVER("DDI PHY %d powered, but still in reset\n", phy); @@ -441,6 +433,9 @@ static void _bxt_ddi_phy_init(struct drm_i915_private *dev_priv, if (phy_info->rcomp_phy != -1) { uint32_t grc_code; + + bxt_phy_wait_grc_done(dev_priv, phy_info->rcomp_phy); + /* * PHY0 isn't connected to an RCOMP resistor so copy over * the corresponding calibrated value from PHY1, and disable @@ -464,10 +459,6 @@ static void _bxt_ddi_phy_init(struct drm_i915_private *dev_priv, val = I915_READ(BXT_PHY_CTL_FAMILY(phy)); val |= COMMON_RESET_DIS; I915_WRITE(BXT_PHY_CTL_FAMILY(phy), val); - - if (phy_info->rcomp_phy == -1) - bxt_phy_wait_grc_done(dev_priv, phy); - } void bxt_ddi_phy_uninit(struct drm_i915_private *dev_priv, enum dpio_phy phy) -- 2.11.0