[PATCH 46/66] drm/i915: Move hsw_fdi_link_train into intel_crt.c

Daniel Vetter
2014-04-24T21:56:55Z

The pch encoder case really isn't anything generic on hsw:
- It's for the vga port only and
- the vga port does only exist on some hsw platforms.

Imo it helps the generic code flow a lot if we shovel all this into
hsw specific enable/disable hooks. A bonus is that some of our largest
files (intel_ddi.c and intel_display.c) will lose a pile of really big
functions.

Step one is to move the fdi link training code.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/intel_crt.c | 136 +++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_ddi.c | 134 +---------------------------------
drivers/gpu/drm/i915/intel_display.c | 4 --
drivers/gpu/drm/i915/intel_drv.h | 3 +-
4 files changed, 140 insertions(+), 137 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index f34d1df88918..2d8f4fe1b450 100644
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -143,6 +143,141 @@ static bool hsw_crt_get_hw_state(struct intel_encoder *encoder,
return intel_ddi_get_port_state(encoder, pipe, PORT_E);
}

+static const long hsw_ddi_buf_ctl_values[] = {
+ DDI_BUF_EMP_400MV_0DB_HSW,
+ DDI_BUF_EMP_400MV_3_5DB_HSW,
+ DDI_BUF_EMP_400MV_6DB_HSW,
+ DDI_BUF_EMP_400MV_9_5DB_HSW,
+ DDI_BUF_EMP_600MV_0DB_HSW,
+ DDI_BUF_EMP_600MV_3_5DB_HSW,
+ DDI_BUF_EMP_600MV_6DB_HSW,
+ DDI_BUF_EMP_800MV_0DB_HSW,
+ DDI_BUF_EMP_800MV_3_5DB_HSW
+};
+
+static void hsw_fdi_link_train(struct drm_crtc *crtc)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ u32 temp, i, rx_ctl_val;
+
+ /* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the
+ * mode set "sequence for CRT port" document:
+ * - TP1 to TP2 time with the default value
+ * - FDI delay to 90h
+ *
+ * WaFDIAutoLinkSetTimingOverrride:hsw
+ */
+ I915_WRITE(_FDI_RXA_MISC, FDI_RX_PWRDN_LANE1_VAL(2) |
+ FDI_RX_PWRDN_LANE0_VAL(2) |
+ FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
+
+ /* Enable the PCH Receiver FDI PLL */
+ rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE |
+ FDI_RX_PLL_ENABLE |
+ FDI_DP_PORT_WIDTH(intel_crtc->config.fdi_lanes);
+ I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
+ POSTING_READ(_FDI_RXA_CTL);
+ udelay(220);
+
+ /* Switch from Rawclk to PCDclk */
+ rx_ctl_val |= FDI_PCDCLK;
+ I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
+
+ /* Configure Port Clock Select */
+ I915_WRITE(PORT_CLK_SEL(PORT_E), intel_crtc->ddi_pll_sel);
+
+ /* Start the training iterating through available voltages and emphasis,
+ * testing each value twice. */
+ for (i = 0; i < ARRAY_SIZE(hsw_ddi_buf_ctl_values) * 2; i++) {
+ /* Configure DP_TP_CTL with auto-training */
+ I915_WRITE(DP_TP_CTL(PORT_E),
+ DP_TP_CTL_FDI_AUTOTRAIN |
+ DP_TP_CTL_ENHANCED_FRAME_ENABLE |
+ DP_TP_CTL_LINK_TRAIN_PAT1 |
+ DP_TP_CTL_ENABLE);
+
+ /* Configure and enable DDI_BUF_CTL for DDI E with next voltage.
+ * DDI E does not support port reversal, the functionality is
+ * achieved on the PCH side in FDI_RX_CTL, so no need to set the
+ * port reversal bit */
+ I915_WRITE(DDI_BUF_CTL(PORT_E),
+ DDI_BUF_CTL_ENABLE |
+ ((intel_crtc->config.fdi_lanes - 1) << 1) |
+ hsw_ddi_buf_ctl_values[i / 2]);
+ POSTING_READ(DDI_BUF_CTL(PORT_E));
+
+ udelay(600);
+
+ /* Program PCH FDI Receiver TU */
+ I915_WRITE(_FDI_RXA_TUSIZE1, TU_SIZE(64));
+
+ /* Enable PCH FDI Receiver with auto-training */
+ rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO;
+ I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
+ POSTING_READ(_FDI_RXA_CTL);
+
+ /* Wait for FDI receiver lane calibration */
+ udelay(30);
+
+ /* Unset FDI_RX_MISC pwrdn lanes */
+ temp = I915_READ(_FDI_RXA_MISC);
+ temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
+ I915_WRITE(_FDI_RXA_MISC, temp);
+ POSTING_READ(_FDI_RXA_MISC);
+
+ /* Wait for FDI auto training time */
+ udelay(5);
+
+ temp = I915_READ(DP_TP_STATUS(PORT_E));
+ if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) {
+ DRM_DEBUG_KMS("FDI link training done on step %d\n", i);
+
+ /* Enable normal pixel sending for FDI */
+ I915_WRITE(DP_TP_CTL(PORT_E),
+ DP_TP_CTL_FDI_AUTOTRAIN |
+ DP_TP_CTL_LINK_TRAIN_NORMAL |
+ DP_TP_CTL_ENHANCED_FRAME_ENABLE |
+ DP_TP_CTL_ENABLE);
+
+ return;
+ }
+
+ temp = I915_READ(DDI_BUF_CTL(PORT_E));
+ temp &= ~DDI_BUF_CTL_ENABLE;
+ I915_WRITE(DDI_BUF_CTL(PORT_E), temp);
+ POSTING_READ(DDI_BUF_CTL(PORT_E));
+
+ /* Disable DP_TP_CTL and FDI_RX_CTL and retry */
+ temp = I915_READ(DP_TP_CTL(PORT_E));
+ temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
+ temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
+ I915_WRITE(DP_TP_CTL(PORT_E), temp);
+ POSTING_READ(DP_TP_CTL(PORT_E));
+
+ intel_wait_ddi_buf_idle(dev_priv, PORT_E);
+
+ rx_ctl_val &= ~FDI_RX_ENABLE;
+ I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
+ POSTING_READ(_FDI_RXA_CTL);
+
+ /* Reset FDI_RX_MISC pwrdn lanes */
+ temp = I915_READ(_FDI_RXA_MISC);
+ temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
+ temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
+ I915_WRITE(_FDI_RXA_MISC, temp);
+ POSTING_READ(_FDI_RXA_MISC);
+ }
+
+ DRM_ERROR("FDI link training failed!\n");
+}
+
+static void hsw_crt_pre_enable(struct intel_encoder *encoder)
+{
+ hsw_fdi_link_train(encoder->base.crtc);
+}
+
/* Note: The caller is required to filter out dpms modes not supported by the
* platform. */
static void intel_crt_set_dpms(struct intel_encoder *encoder, int mode)
@@ -865,6 +1000,7 @@ void intel_crt_init(struct drm_device *dev)
if (HAS_DDI(dev)) {
crt->base.get_config = hsw_crt_get_config;
crt->base.get_hw_state = hsw_crt_get_hw_state;
+ crt->base.pre_enable = hsw_crt_pre_enable;
} else {
crt->base.get_config = intel_crt_get_config;
crt->base.get_hw_state = intel_crt_get_hw_state;
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index afa1e87c54cc..13abde3e848f 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -211,20 +211,8 @@ void intel_prepare_ddi(struct drm_device *dev)
intel_prepare_ddi_buffers(dev, port);
}

-static const long hsw_ddi_buf_ctl_values[] = {
- DDI_BUF_EMP_400MV_0DB_HSW,
- DDI_BUF_EMP_400MV_3_5DB_HSW,
- DDI_BUF_EMP_400MV_6DB_HSW,
- DDI_BUF_EMP_400MV_9_5DB_HSW,
- DDI_BUF_EMP_600MV_0DB_HSW,
- DDI_BUF_EMP_600MV_3_5DB_HSW,
- DDI_BUF_EMP_600MV_6DB_HSW,
- DDI_BUF_EMP_800MV_0DB_HSW,
- DDI_BUF_EMP_800MV_3_5DB_HSW
-};
-
-static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
- enum port port)
+void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
+ enum port port)
{
uint32_t reg = DDI_BUF_CTL(port);
int i;
@@ -246,124 +234,6 @@ static void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
* DDI A (which is used for eDP)
*/

-void hsw_fdi_link_train(struct drm_crtc *crtc)
-{
- struct drm_device *dev = crtc->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
- u32 temp, i, rx_ctl_val;
-
- /* Set the FDI_RX_MISC pwrdn lanes and the 2 workarounds listed at the
- * mode set "sequence for CRT port" document:
- * - TP1 to TP2 time with the default value
- * - FDI delay to 90h
- *
- * WaFDIAutoLinkSetTimingOverrride:hsw
- */
- I915_WRITE(_FDI_RXA_MISC, FDI_RX_PWRDN_LANE1_VAL(2) |
- FDI_RX_PWRDN_LANE0_VAL(2) |
- FDI_RX_TP1_TO_TP2_48 | FDI_RX_FDI_DELAY_90);
-
- /* Enable the PCH Receiver FDI PLL */
- rx_ctl_val = dev_priv->fdi_rx_config | FDI_RX_ENHANCE_FRAME_ENABLE |
- FDI_RX_PLL_ENABLE |
- FDI_DP_PORT_WIDTH(intel_crtc->config.fdi_lanes);
- I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
- POSTING_READ(_FDI_RXA_CTL);
- udelay(220);
-
- /* Switch from Rawclk to PCDclk */
- rx_ctl_val |= FDI_PCDCLK;
- I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
-
- /* Configure Port Clock Select */
- I915_WRITE(PORT_CLK_SEL(PORT_E), intel_crtc->ddi_pll_sel);
-
- /* Start the training iterating through available voltages and emphasis,
- * testing each value twice. */
- for (i = 0; i < ARRAY_SIZE(hsw_ddi_buf_ctl_values) * 2; i++) {
- /* Configure DP_TP_CTL with auto-training */
- I915_WRITE(DP_TP_CTL(PORT_E),
- DP_TP_CTL_FDI_AUTOTRAIN |
- DP_TP_CTL_ENHANCED_FRAME_ENABLE |
- DP_TP_CTL_LINK_TRAIN_PAT1 |
- DP_TP_CTL_ENABLE);
-
- /* Configure and enable DDI_BUF_CTL for DDI E with next voltage.
- * DDI E does not support port reversal, the functionality is
- * achieved on the PCH side in FDI_RX_CTL, so no need to set the
- * port reversal bit */
- I915_WRITE(DDI_BUF_CTL(PORT_E),
- DDI_BUF_CTL_ENABLE |
- ((intel_crtc->config.fdi_lanes - 1) << 1) |
- hsw_ddi_buf_ctl_values[i / 2]);
- POSTING_READ(DDI_BUF_CTL(PORT_E));
-
- udelay(600);
-
- /* Program PCH FDI Receiver TU */
- I915_WRITE(_FDI_RXA_TUSIZE1, TU_SIZE(64));
-
- /* Enable PCH FDI Receiver with auto-training */
- rx_ctl_val |= FDI_RX_ENABLE | FDI_LINK_TRAIN_AUTO;
- I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
- POSTING_READ(_FDI_RXA_CTL);
-
- /* Wait for FDI receiver lane calibration */
- udelay(30);
-
- /* Unset FDI_RX_MISC pwrdn lanes */
- temp = I915_READ(_FDI_RXA_MISC);
- temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
- I915_WRITE(_FDI_RXA_MISC, temp);
- POSTING_READ(_FDI_RXA_MISC);
-
- /* Wait for FDI auto training time */
- udelay(5);
-
- temp = I915_READ(DP_TP_STATUS(PORT_E));
- if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) {
- DRM_DEBUG_KMS("FDI link training done on step %d\n", i);
-
- /* Enable normal pixel sending for FDI */
- I915_WRITE(DP_TP_CTL(PORT_E),
- DP_TP_CTL_FDI_AUTOTRAIN |
- DP_TP_CTL_LINK_TRAIN_NORMAL |
- DP_TP_CTL_ENHANCED_FRAME_ENABLE |
- DP_TP_CTL_ENABLE);
-
- return;
- }
-
- temp = I915_READ(DDI_BUF_CTL(PORT_E));
- temp &= ~DDI_BUF_CTL_ENABLE;
- I915_WRITE(DDI_BUF_CTL(PORT_E), temp);
- POSTING_READ(DDI_BUF_CTL(PORT_E));
-
- /* Disable DP_TP_CTL and FDI_RX_CTL and retry */
- temp = I915_READ(DP_TP_CTL(PORT_E));
- temp &= ~(DP_TP_CTL_ENABLE | DP_TP_CTL_LINK_TRAIN_MASK);
- temp |= DP_TP_CTL_LINK_TRAIN_PAT1;
- I915_WRITE(DP_TP_CTL(PORT_E), temp);
- POSTING_READ(DP_TP_CTL(PORT_E));
-
- intel_wait_ddi_buf_idle(dev_priv, PORT_E);
-
- rx_ctl_val &= ~FDI_RX_ENABLE;
- I915_WRITE(_FDI_RXA_CTL, rx_ctl_val);
- POSTING_READ(_FDI_RXA_CTL);
-
- /* Reset FDI_RX_MISC pwrdn lanes */
- temp = I915_READ(_FDI_RXA_MISC);
- temp &= ~(FDI_RX_PWRDN_LANE1_MASK | FDI_RX_PWRDN_LANE0_MASK);
- temp |= FDI_RX_PWRDN_LANE1_VAL(2) | FDI_RX_PWRDN_LANE0_VAL(2);
- I915_WRITE(_FDI_RXA_MISC, temp);
- POSTING_READ(_FDI_RXA_MISC);
- }
-
- DRM_ERROR("FDI link training failed!\n");
-}
-
static struct intel_encoder *
intel_ddi_get_crtc_encoder(struct drm_crtc *crtc)
{
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 82ad84eefc8d..80b34ac31d0a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3858,9 +3858,6 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
if (intel_crtc->config.has_pch_encoder)
intel_set_pch_fifo_underrun_reporting(dev, TRANSCODER_A, true);

- if (intel_crtc->config.has_pch_encoder)
- dev_priv->display.fdi_link_train(crtc);
-
for_each_encoder_on_crtc(dev, crtc, encoder)
if (encoder->pre_enable)
encoder->pre_enable(encoder);
@@ -11120,7 +11117,6 @@ static void intel_init_display(struct drm_device *dev)
dev_priv->display.modeset_global_resources =
ivb_modeset_global_resources;
} else if (IS_HASWELL(dev) || IS_GEN8(dev)) {
- dev_priv->display.fdi_link_train = hsw_fdi_link_train;
dev_priv->display.write_eld = haswell_write_eld;
dev_priv->display.modeset_global_resources =
haswell_modeset_global_resources;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 1c093e71db7d..7f1d7f675953 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -668,11 +668,12 @@ void intel_crt_init(struct drm_device *dev);

/* intel_ddi.c */
void intel_prepare_ddi(struct drm_device *dev);
-void hsw_fdi_link_train(struct drm_crtc *crtc);
void intel_ddi_init(struct drm_device *dev, enum port port);
enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder);
bool intel_ddi_get_port_state(struct intel_encoder *encoder, enum pipe *pipe,
enum port port);
+void intel_wait_ddi_buf_idle(struct drm_i915_private *dev_priv,
+ enum port port);
int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv);
void intel_ddi_pll_init(struct drm_device *dev);
void intel_ddi_enable_transcoder_func(struct drm_crtc *crtc);
--
1.8.1.4