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drm/i915: Add state readout and checking for has_dp_encoder and dp_m_n

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Add functions to read out the CPU and PCH transcoder M/N values,
and use them to fill out the pipe config dp_m_n information. And
while at it populate has_dp_encoder too.

Also refactor ironlake_get_fdi_m_n_config() to simply call the new
intel_cpu_transcoder_get_m_n() function.

v2: Remember the DDI

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä
2013-09-10 17:02:54 +03:00
committed by Daniel Vetter
parent 42571aefaf
commit eb14cb747b
4 changed files with 86 additions and 10 deletions
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4
drivers/gpu/drm/i915/intel_dp.c
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@@ -1444,6 +1444,10 @@ static void intel_dp_get_config(struct intel_encoder *encoder,
pipe_config->adjusted_mode.flags |= flags;
pipe_config->has_dp_encoder = true;
intel_dp_get_m_n(crtc, pipe_config);
if (dp_to_dig_port(intel_dp)->port == PORT_A) {
if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_160MHZ)
pipe_config->port_clock = 162000;