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drm/i915/chv: Try to program the PHY used clock channel overrides

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These should make it possible to feed port C from pipe A or port B from
pipe B. Didn't quite seem to work though.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-04-09 13:29:05 +03:00 committed by Daniel Vetter
parent 13a5660c13
commit 9197c88bf9
3 changed files with 99 additions and 0 deletions
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7
drivers/gpu/drm/i915/i915_reg.h
View File

@ -771,6 +771,8 @@ enum punit_power_well {
#define _VLV_PCS_DW8_CH0 0x8220
#define _VLV_PCS_DW8_CH1 0x8420
#define CHV_PCS_USEDCLKCHANNEL_OVRRIDE (1 << 20)
#define CHV_PCS_USEDCLKCHANNEL (1 << 21)
#define VLV_PCS_DW8(ch) _PORT(ch, _VLV_PCS_DW8_CH0, _VLV_PCS_DW8_CH1)
#define _VLV_PCS01_DW8_CH0 0x0220
@ -895,6 +897,11 @@ enum punit_power_well {
#define DPIO_DCLKP_EN (1 << 13)
#define CHV_CMN_DW14(ch) _PIPE(ch, _CHV_CMN_DW14_CH0, _CHV_CMN_DW1_CH1)
#define _CHV_CMN_DW19_CH0 0x814c
#define _CHV_CMN_DW6_CH1 0x8098
#define CHV_CMN_USEDCLKCHANNEL (1 << 13)
#define CHV_CMN_DW19(ch) _PIPE(ch, _CHV_CMN_DW19_CH0, _CHV_CMN_DW6_CH1)
#define CHV_CMN_DW30 0x8178
#define DPIO_LRC_BYPASS (1 << 3)

46
drivers/gpu/drm/i915/intel_dp.c
View File

@ -2119,6 +2119,51 @@ static void chv_pre_enable_dp(struct intel_encoder *encoder)
vlv_wait_port_ready(dev_priv, dport);
}
static void chv_dp_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;
u32 val;
mutex_lock(&dev_priv->dpio_lock);
/* 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);
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->dpio_lock);
}
/*
* Native read with retry for link status and receiver capability reads for
* cases where the sink may still be asleep.
@ -4335,6 +4380,7 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
intel_encoder->get_hw_state = intel_dp_get_hw_state;
intel_encoder->get_config = intel_dp_get_config;
if (IS_CHERRYVIEW(dev)) {
intel_encoder->pre_pll_enable = chv_dp_pre_pll_enable;
intel_encoder->pre_enable = chv_pre_enable_dp;
intel_encoder->enable = vlv_enable_dp;
intel_encoder->post_disable = chv_post_disable_dp;

46
drivers/gpu/drm/i915/intel_hdmi.c
View File

@ -1229,6 +1229,51 @@ static void vlv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
mutex_unlock(&dev_priv->dpio_lock);
}
static void chv_hdmi_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;
u32 val;
mutex_lock(&dev_priv->dpio_lock);
/* 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);
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->dpio_lock);
}
static void vlv_hdmi_post_disable(struct intel_encoder *encoder)
{
struct intel_digital_port *dport = enc_to_dig_port(&encoder->base);
@ -1528,6 +1573,7 @@ void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port)
intel_encoder->get_hw_state = intel_hdmi_get_hw_state;
intel_encoder->get_config = intel_hdmi_get_config;
if (IS_CHERRYVIEW(dev)) {
intel_encoder->pre_pll_enable = chv_hdmi_pre_pll_enable;
intel_encoder->pre_enable = chv_hdmi_pre_enable;
intel_encoder->enable = vlv_enable_hdmi;
intel_encoder->post_disable = chv_hdmi_post_disable;