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drm/i915: Only wait for required lanes in vlv_wait_port_ready() 

Currently vlv_wait_port_ready() waits for all four lanes on the
appropriate channel. This no longer works on CHV when the unused
lanes may be power gated. So pass in a mask of lanes that the
caller is expecting to be ready.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by:  Deepak S<deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2015-04-10 18:21:31 +03:00 committed by Daniel Vetter
parent c7c7372edc
commit 9b6de0a155
4 changed files with 13 additions and 8 deletions
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10
drivers/gpu/drm/i915/intel_display.c
View File

@ -1844,7 +1844,8 @@ static void chv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe)
}
void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
struct intel_digital_port *dport)
struct intel_digital_port *dport,
unsigned int expected_mask)
{
u32 port_mask;
int dpll_reg;
@ -1857,6 +1858,7 @@ void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
case PORT_C:
port_mask = DPLL_PORTC_READY_MASK;
dpll_reg = DPLL(0);
expected_mask <<= 4;
break;
case PORT_D:
port_mask = DPLL_PORTD_READY_MASK;
@ -1866,9 +1868,9 @@ void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
BUG();
}
if (wait_for((I915_READ(dpll_reg) & port_mask) == 0, 1000))
WARN(1, "timed out waiting for port %c ready: 0x%08x\n",
port_name(dport->port), I915_READ(dpll_reg));
if (wait_for((I915_READ(dpll_reg) & port_mask) == expected_mask, 1000))
WARN(1, "timed out waiting for port %c ready: got 0x%x, expected 0x%x\n",
port_name(dport->port), I915_READ(dpll_reg) & port_mask, expected_mask);
}
static void intel_prepare_shared_dpll(struct intel_crtc *crtc)

4
drivers/gpu/drm/i915/intel_dp.c
View File

@ -2497,6 +2497,7 @@ static void intel_enable_dp(struct intel_encoder *encoder)
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
uint32_t dp_reg = I915_READ(intel_dp->output_reg);
unsigned int lane_mask = 0x0;
if (WARN_ON(dp_reg & DP_PORT_EN))
return;
@ -2515,7 +2516,8 @@ static void intel_enable_dp(struct intel_encoder *encoder)
pps_unlock(intel_dp);
if (IS_VALLEYVIEW(dev))
vlv_wait_port_ready(dev_priv, dp_to_dig_port(intel_dp));
vlv_wait_port_ready(dev_priv, dp_to_dig_port(intel_dp),
lane_mask);
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
intel_dp_start_link_train(intel_dp);

3
drivers/gpu/drm/i915/intel_drv.h
View File

@ -1013,7 +1013,8 @@ intel_wait_for_vblank(struct drm_device *dev, int pipe)
}
int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp);
void vlv_wait_port_ready(struct drm_i915_private *dev_priv,
struct intel_digital_port *dport);
struct intel_digital_port *dport,
unsigned int expected_mask);
bool intel_get_load_detect_pipe(struct drm_connector *connector,
struct drm_display_mode *mode,
struct intel_load_detect_pipe *old,

4
drivers/gpu/drm/i915/intel_hdmi.c
View File

@ -1324,7 +1324,7 @@ static void vlv_hdmi_pre_enable(struct intel_encoder *encoder)
intel_enable_hdmi(encoder);
vlv_wait_port_ready(dev_priv, dport);
vlv_wait_port_ready(dev_priv, dport, 0x0);
}
static void vlv_hdmi_pre_pll_enable(struct intel_encoder *encoder)
@ -1641,7 +1641,7 @@ static void chv_hdmi_pre_enable(struct intel_encoder *encoder)
intel_enable_hdmi(encoder);
vlv_wait_port_ready(dev_priv, dport);
vlv_wait_port_ready(dev_priv, dport, 0x0);
}
static void intel_hdmi_destroy(struct drm_connector *connector)