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Commit 0b2eb33e authored by Ville Syrjälä's avatar Ville Syrjälä Committed by Daniel Vetter
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drm/i915: LPT:LP needs port A HPD enabled in both north and south 



If the CPU and PCH are on the same package we must enabled the port A
HPD also in the south hotplug register. To identify the package type
we simply look at the PCH type: LPT-H means separate package, and
LPT-LP means multi chip package (MCP).

v2: Add comment and pimp commit message

Reviewed-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 23bb4cb5

drivers/gpu/drm/i915/i915_irq.c

+6 −0
Original line number Diff line number Diff line
@@ -3131,6 +3131,12 @@ static void ibx_hpd_irq_setup(struct drm_device *dev) 
	hotplug |= PORTD_HOTPLUG_ENABLE | PORTD_PULSE_DURATION_2ms;

	hotplug |= PORTC_HOTPLUG_ENABLE | PORTC_PULSE_DURATION_2ms;

	hotplug |= PORTB_HOTPLUG_ENABLE | PORTB_PULSE_DURATION_2ms;

	/*

	 * When CPU and PCH are on the same package, port A

	 * HPD must be enabled in both north and south.

	 */

	if (HAS_PCH_LPT_LP(dev))

		hotplug |= PORTA_HOTPLUG_ENABLE;

	I915_WRITE(PCH_PORT_HOTPLUG, hotplug);

}