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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: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2014-01-20 16:00:59 +00:00 committed by Daniel Vetter
parent fb8aad4bec
commit b6b5e38323
1 changed files with 13 additions and 1 deletions
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14
drivers/gpu/drm/i915/intel_dp.c
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@ -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;