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authorAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>2016-04-27 15:44:19 +0300
committerAnder Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>2016-04-29 09:56:22 +0300
commit419b1b7ae13ed0518032ff8d564c0efc0008d20d (patch)
treebafa4cd7432bcafe844de339d6bb43988b9e2b12 /drivers/gpu/drm/i915/intel_dpio_phy.c
parent844b2f9a5d061e5d2d09b0664fad0e0bfa39dc39 (diff)
downloadlinux-419b1b7ae13ed0518032ff8d564c0efc0008d20d.tar.xz
drm/i915: Unduplicate CHV phy-releated pre pll enabling code
The same logic is used for DP and HDMI so move it to intel_dpio_phy.c. v2: Rebase Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> Reviewed-by: Jim Bride <jim.bride@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1461761065-21195-5-git-send-email-ander.conselvan.de.oliveira@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dpio_phy.c')
-rw-r--r--drivers/gpu/drm/i915/intel_dpio_phy.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dpio_phy.c b/drivers/gpu/drm/i915/intel_dpio_phy.c
index 9854c9357b88..b4ca3ff7369a 100644
--- a/drivers/gpu/drm/i915/intel_dpio_phy.c
+++ b/drivers/gpu/drm/i915/intel_dpio_phy.c
@@ -163,3 +163,84 @@ void chv_data_lane_soft_reset(struct intel_encoder *encoder,
vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW1(ch), val);
}
}
+
+void chv_phy_pre_pll_enable(struct intel_encoder *encoder)
+{
+ struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
+ struct drm_device *dev = encoder->base.dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *intel_crtc =
+ to_intel_crtc(encoder->base.crtc);
+ enum dpio_channel ch = vlv_dport_to_channel(dport);
+ enum pipe pipe = intel_crtc->pipe;
+ unsigned int lane_mask =
+ intel_dp_unused_lane_mask(intel_crtc->config->lane_count);
+ u32 val;
+
+ /*
+ * Must trick the second common lane into life.
+ * Otherwise we can't even access the PLL.
+ */
+ if (ch == DPIO_CH0 && pipe == PIPE_B)
+ dport->release_cl2_override =
+ !chv_phy_powergate_ch(dev_priv, DPIO_PHY0, DPIO_CH1, true);
+
+ chv_phy_powergate_lanes(encoder, true, lane_mask);
+
+ mutex_lock(&dev_priv->sb_lock);
+
+ /* Assert data lane reset */
+ chv_data_lane_soft_reset(encoder, true);
+
+ /* program left/right clock distribution */
+ if (pipe != PIPE_B) {
+ val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW5_CH0);
+ val &= ~(CHV_BUFLEFTENA1_MASK | CHV_BUFRIGHTENA1_MASK);
+ if (ch == DPIO_CH0)
+ val |= CHV_BUFLEFTENA1_FORCE;
+ if (ch == DPIO_CH1)
+ val |= CHV_BUFRIGHTENA1_FORCE;
+ vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW5_CH0, val);
+ } else {
+ val = vlv_dpio_read(dev_priv, pipe, _CHV_CMN_DW1_CH1);
+ val &= ~(CHV_BUFLEFTENA2_MASK | CHV_BUFRIGHTENA2_MASK);
+ if (ch == DPIO_CH0)
+ val |= CHV_BUFLEFTENA2_FORCE;
+ if (ch == DPIO_CH1)
+ val |= CHV_BUFRIGHTENA2_FORCE;
+ vlv_dpio_write(dev_priv, pipe, _CHV_CMN_DW1_CH1, val);
+ }
+
+ /* program clock channel usage */
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS01_DW8(ch));
+ val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
+ if (pipe != PIPE_B)
+ val &= ~CHV_PCS_USEDCLKCHANNEL;
+ else
+ val |= CHV_PCS_USEDCLKCHANNEL;
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS01_DW8(ch), val);
+
+ if (intel_crtc->config->lane_count > 2) {
+ val = vlv_dpio_read(dev_priv, pipe, VLV_PCS23_DW8(ch));
+ val |= CHV_PCS_USEDCLKCHANNEL_OVRRIDE;
+ if (pipe != PIPE_B)
+ val &= ~CHV_PCS_USEDCLKCHANNEL;
+ else
+ val |= CHV_PCS_USEDCLKCHANNEL;
+ vlv_dpio_write(dev_priv, pipe, VLV_PCS23_DW8(ch), val);
+ }
+
+ /*
+ * This a a bit weird since generally CL
+ * matches the pipe, but here we need to
+ * pick the CL based on the port.
+ */
+ val = vlv_dpio_read(dev_priv, pipe, CHV_CMN_DW19(ch));
+ if (pipe != PIPE_B)
+ val &= ~CHV_CMN_USEDCLKCHANNEL;
+ else
+ val |= CHV_CMN_USEDCLKCHANNEL;
+ vlv_dpio_write(dev_priv, pipe, CHV_CMN_DW19(ch), val);
+
+ mutex_unlock(&dev_priv->sb_lock);
+}