From b6b5e38323b276cae53cf34970d968084de701bc Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Mon, 20 Jan 2014 16:00:59 +0000 Subject: [PATCH] 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 Signed-off-by: Damien Lespiau Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 17c6910..4d2f704 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -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; -- 2.7.4