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drm/i915: enable DisplayPort support on IGDNG

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Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhenyu Wang
2009-07-24 01:00:31 +08:00
committed by Eric Anholt
parent eebc863e46
commit 5eb08b69f5
3 changed files with 157 additions and 21 deletions
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102
drivers/gpu/drm/i915/intel_dp.c
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@@ -206,7 +206,12 @@ intel_dp_aux_ch(struct intel_output *intel_output,
* and would like to run at 2MHz. So, take the
* hrawclk value and divide by 2 and use that
*/
aux_clock_divider = intel_hrawclk(dev) / 2;
/* IGDNG: input clock fixed at 125Mhz, so aux_bit_clk always 62 */
if (IS_IGDNG(dev))
aux_clock_divider = 62;
else
aux_clock_divider = intel_hrawclk(dev) / 2;
/* Must try at least 3 times according to DP spec */
for (try = 0; try < 5; try++) {
/* Load the send data into the aux channel data registers */
@@ -493,22 +498,40 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
intel_dp_compute_m_n(3, lane_count,
mode->clock, adjusted_mode->clock, &m_n);
if (intel_crtc->pipe == 0) {
I915_WRITE(PIPEA_GMCH_DATA_M,
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
m_n.gmch_m);
I915_WRITE(PIPEA_GMCH_DATA_N,
m_n.gmch_n);
I915_WRITE(PIPEA_DP_LINK_M, m_n.link_m);
I915_WRITE(PIPEA_DP_LINK_N, m_n.link_n);
if (IS_IGDNG(dev)) {
if (intel_crtc->pipe == 0) {
I915_WRITE(TRANSA_DATA_M1,
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
m_n.gmch_m);
I915_WRITE(TRANSA_DATA_N1, m_n.gmch_n);
I915_WRITE(TRANSA_DP_LINK_M1, m_n.link_m);
I915_WRITE(TRANSA_DP_LINK_N1, m_n.link_n);
} else {
I915_WRITE(TRANSB_DATA_M1,
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
m_n.gmch_m);
I915_WRITE(TRANSB_DATA_N1, m_n.gmch_n);
I915_WRITE(TRANSB_DP_LINK_M1, m_n.link_m);
I915_WRITE(TRANSB_DP_LINK_N1, m_n.link_n);
}
} else {
I915_WRITE(PIPEB_GMCH_DATA_M,
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
m_n.gmch_m);
I915_WRITE(PIPEB_GMCH_DATA_N,
m_n.gmch_n);
I915_WRITE(PIPEB_DP_LINK_M, m_n.link_m);
I915_WRITE(PIPEB_DP_LINK_N, m_n.link_n);
if (intel_crtc->pipe == 0) {
I915_WRITE(PIPEA_GMCH_DATA_M,
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
m_n.gmch_m);
I915_WRITE(PIPEA_GMCH_DATA_N,
m_n.gmch_n);
I915_WRITE(PIPEA_DP_LINK_M, m_n.link_m);
I915_WRITE(PIPEA_DP_LINK_N, m_n.link_n);
} else {
I915_WRITE(PIPEB_GMCH_DATA_M,
((m_n.tu - 1) << PIPE_GMCH_DATA_M_TU_SIZE_SHIFT) |
m_n.gmch_m);
I915_WRITE(PIPEB_GMCH_DATA_N,
m_n.gmch_n);
I915_WRITE(PIPEB_DP_LINK_M, m_n.link_m);
I915_WRITE(PIPEB_DP_LINK_N, m_n.link_n);
}
}
}
@@ -935,6 +958,12 @@ intel_dp_link_down(struct intel_output *intel_output, uint32_t DP)
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_dp_priv *dp_priv = intel_output->dev_priv;
DP &= ~DP_LINK_TRAIN_MASK;
I915_WRITE(dp_priv->output_reg, DP | DP_LINK_TRAIN_PAT_IDLE);
POSTING_READ(dp_priv->output_reg);
udelay(17000);
I915_WRITE(dp_priv->output_reg, DP & ~DP_PORT_EN);
POSTING_READ(dp_priv->output_reg);
}
@@ -978,6 +1007,24 @@ intel_dp_check_link_status(struct intel_output *intel_output)
intel_dp_link_train(intel_output, dp_priv->DP, dp_priv->link_configuration);
}
static enum drm_connector_status
igdng_dp_detect(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
struct intel_dp_priv *dp_priv = intel_output->dev_priv;
enum drm_connector_status status;
status = connector_status_disconnected;
if (intel_dp_aux_native_read(intel_output,
0x000, dp_priv->dpcd,
sizeof (dp_priv->dpcd)) == sizeof (dp_priv->dpcd))
{
if (dp_priv->dpcd[0] != 0)
status = connector_status_connected;
}
return status;
}
/**
* Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect DP connection.
*
@@ -996,6 +1043,9 @@ intel_dp_detect(struct drm_connector *connector)
dp_priv->has_audio = false;
if (IS_IGDNG(dev))
return igdng_dp_detect(connector);
temp = I915_READ(PORT_HOTPLUG_EN);
I915_WRITE(PORT_HOTPLUG_EN,
@@ -1106,6 +1156,7 @@ intel_dp_init(struct drm_device *dev, int output_reg)
struct drm_connector *connector;
struct intel_output *intel_output;
struct intel_dp_priv *dp_priv;
const char *name = NULL;
intel_output = kcalloc(sizeof(struct intel_output) +
sizeof(struct intel_dp_priv), 1, GFP_KERNEL);
@@ -1139,9 +1190,22 @@ intel_dp_init(struct drm_device *dev, int output_reg)
drm_sysfs_connector_add(connector);
/* Set up the DDC bus. */
intel_dp_i2c_init(intel_output,
(output_reg == DP_B) ? "DPDDC-B" :
(output_reg == DP_C) ? "DPDDC-C" : "DPDDC-D");
switch (output_reg) {
case DP_B:
case PCH_DP_B:
name = "DPDDC-B";
break;
case DP_C:
case PCH_DP_C:
name = "DPDDC-C";
break;
case DP_D:
case PCH_DP_D:
name = "DPDDC-D";
break;
}
intel_dp_i2c_init(intel_output, name);
intel_output->ddc_bus = &dp_priv->adapter;
intel_output->hot_plug = intel_dp_hot_plug;