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Commit 7f3561be authored by Sonika Jindal's avatar Sonika Jindal Committed by Daniel Vetter
Browse files

drm/i915/bxt: Add HPD support for DDIA 



Also remove redundant comments.

Signed-off-by: default avatarSonika Jindal <sonika.jindal@intel.com>
Reviewed-by: default avatarSivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 25f50337

drivers/gpu/drm/i915/i915_irq.c

+3 −7
Original line number Diff line number Diff line
@@ -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);