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drm/i915: Create helper functions to determine eDP power state

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We need to check eDP VDD force and panel on in several places, so
create some simple helper functions to avoid duplicating code.

Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Keith Packard 2011-09-29 15:53:27 -07:00
parent 7d639f35b7
commit ebf33b1881
1 changed files with 26 additions and 13 deletions
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39
drivers/gpu/drm/i915/intel_dp.c
View file

@ -283,20 +283,34 @@ intel_hrawclk(struct drm_device *dev)
}
}
static bool ironlake_edp_have_panel_power(struct intel_dp *intel_dp)
{
struct drm_device *dev = intel_dp->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
return (I915_READ(PCH_PP_STATUS) & PP_ON) != 0;
}
static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp)
{
struct drm_device *dev = intel_dp->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
return (I915_READ(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0;
}
static void
intel_dp_check_edp(struct intel_dp *intel_dp)
{
struct drm_device *dev = intel_dp->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pp_status, pp_control;
if (!is_edp(intel_dp))
return;
pp_status = I915_READ(PCH_PP_STATUS);
pp_control = I915_READ(PCH_PP_CONTROL);
if ((pp_status & PP_ON) == 0 && (pp_control & EDP_FORCE_VDD) == 0) {
if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) {
WARN(1, "eDP powered off while attempting aux channel communication.\n");
DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
pp_status,
I915_READ(PCH_PP_STATUS),
I915_READ(PCH_PP_CONTROL));
}
}
@ -852,16 +866,11 @@ static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp)
{
struct drm_device *dev = intel_dp->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
u32 pp, pp_status;
u32 pp;
if (!is_edp(intel_dp))
return;
DRM_DEBUG_KMS("Turn eDP VDD on\n");
/*
* If the panel wasn't on, make sure there's not a currently
* active PP sequence before enabling AUX VDD.
*/
pp_status = I915_READ(PCH_PP_STATUS);
pp = I915_READ(PCH_PP_CONTROL);
pp &= ~PANEL_UNLOCK_MASK;
@ -871,7 +880,11 @@ static void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp)
POSTING_READ(PCH_PP_CONTROL);
DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n",
I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL));
if (!(pp_status & PP_ON)) {
/*
* If the panel wasn't on, delay before accessing aux channel
*/
if (!ironlake_edp_have_panel_power(intel_dp)) {
msleep(intel_dp->panel_power_up_delay);
DRM_DEBUG_KMS("eDP VDD was not on\n");
}
@ -908,7 +921,7 @@ static void ironlake_edp_panel_on (struct intel_dp *intel_dp)
if (!is_edp(intel_dp))
return true;
if (I915_READ(PCH_PP_STATUS) & PP_ON)
if (ironlake_edp_have_panel_power(intel_dp))
return;
pp = I915_READ(PCH_PP_CONTROL);