Commit b6b5e383 authored by Damien Lespiau's avatar Damien Lespiau Committed by Daniel Vetter
Browse files

drm/i915/skl: Implement the get_aux_clock_divider() DP vfunc 



We need to provide a vfunc that will make the code in intel_dp_aux_ch()
loop once to start the AUX transaction. The return value (clock divider)
is unused on SKL, so just return 1.

Reviewed-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: default avatarDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent fb8aad4b

drivers/gpu/drm/i915/intel_dp.c

+13 −1
Original line number Diff line number Diff line
@@ -661,6 +661,16 @@ static uint32_t vlv_get_aux_clock_divider(struct intel_dp *intel_dp, int index) 
	return index ? 0 : 100;

}



static uint32_t skl_get_aux_clock_divider(struct intel_dp *intel_dp, int index)

{

	/*

	 * SKL doesn't need us to program the AUX clock divider (Hardware will

	 * derive the clock from CDCLK automatically). We still implement the

	 * get_aux_clock_divider vfunc to plug-in into the existing code.

	 */

	return index ? 0 : 1;

}



static uint32_t i9xx_get_aux_send_ctl(struct intel_dp *intel_dp,

				      bool has_aux_irq,

				      int send_bytes,
@@ -5083,7 +5093,9 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port, 
	intel_dp->pps_pipe = INVALID_PIPE;



	/* intel_dp vfuncs */

	if (IS_VALLEYVIEW(dev))

	if (INTEL_INFO(dev)->gen >= 9)

		intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider;

	else if (IS_VALLEYVIEW(dev))

		intel_dp->get_aux_clock_divider = vlv_get_aux_clock_divider;

	else if (IS_HASWELL(dev) || IS_BROADWELL(dev))

		intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider;

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