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drm/i915/bxt: Add HPD support for DDIA 

Also remove redundant comments.

Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Sonika Jindal 2015-08-10 10:35:35 +05:30 committed by Daniel Vetter
parent 25f5033761
commit 7f3561bec7
1 changed files with 3 additions and 7 deletions
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10
drivers/gpu/drm/i915/i915_irq.c
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@ -90,6 +90,7 @@ static const u32 hpd_status_i915[HPD_NUM_PINS] = {
/* BXT hpd list */
static const u32 hpd_bxt[HPD_NUM_PINS] = {
[HPD_PORT_A] = BXT_DE_PORT_HP_DDIA,
[HPD_PORT_B] = BXT_DE_PORT_HP_DDIB,
[HPD_PORT_C] = BXT_DE_PORT_HP_DDIC
};
@ -3014,30 +3015,25 @@ static void bxt_hpd_irq_setup(struct drm_device *dev)
u32 hotplug_port = 0;
u32 hotplug_ctrl;
/* Now, enable HPD */
for_each_intel_encoder(dev, intel_encoder) {
if (dev_priv->hotplug.stats[intel_encoder->hpd_pin].state
== HPD_ENABLED)
hotplug_port |= hpd_bxt[intel_encoder->hpd_pin];
}
/* Mask all HPD control bits */
hotplug_ctrl = I915_READ(BXT_HOTPLUG_CTL) & ~BXT_HOTPLUG_CTL_MASK;
/* Enable requested port in hotplug control */
/* TODO: implement (short) HPD support on port A */
WARN_ON_ONCE(hotplug_port & BXT_DE_PORT_HP_DDIA);
if (hotplug_port & BXT_DE_PORT_HP_DDIA)
hotplug_ctrl |= BXT_DDIA_HPD_ENABLE;
if (hotplug_port & BXT_DE_PORT_HP_DDIB)
hotplug_ctrl |= BXT_DDIB_HPD_ENABLE;
if (hotplug_port & BXT_DE_PORT_HP_DDIC)
hotplug_ctrl |= BXT_DDIC_HPD_ENABLE;
I915_WRITE(BXT_HOTPLUG_CTL, hotplug_ctrl);
/* Unmask DDI hotplug in IMR */
hotplug_ctrl = I915_READ(GEN8_DE_PORT_IMR) & ~hotplug_port;
I915_WRITE(GEN8_DE_PORT_IMR, hotplug_ctrl);
/* Enable DDI hotplug in IER */
hotplug_ctrl = I915_READ(GEN8_DE_PORT_IER) | hotplug_port;
I915_WRITE(GEN8_DE_PORT_IER, hotplug_ctrl);
POSTING_READ(GEN8_DE_PORT_IER);