drm/i915/bxt: get_hw_state for BXT
Pick appropriate port control register (BXT or VLV), based on device. Get the current hw state wrt Mipi port. v2: Rebased on latest drm nightly branch. v3: Removed the GET_DSI_PORT_CTRL Macro for consistency with earlier implementations as per Jani's suggestion. Signed-off-by: Shashank Sharma <shashank.sharma@intel.com> Signed-off-by: Uma Shankar <uma.shankar@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -656,7 +656,7 @@ static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
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struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
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struct drm_device *dev = encoder->base.dev;
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enum intel_display_power_domain power_domain;
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u32 dpi_enabled, func;
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u32 dpi_enabled, func, ctrl_reg;
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enum port port;
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DRM_DEBUG_KMS("\n");
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@ -668,8 +668,9 @@ static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
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/* XXX: this only works for one DSI output */
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for_each_dsi_port(port, intel_dsi->ports) {
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func = I915_READ(MIPI_DSI_FUNC_PRG(port));
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dpi_enabled = I915_READ(MIPI_PORT_CTRL(port)) &
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DPI_ENABLE;
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ctrl_reg = IS_BROXTON(dev) ? BXT_MIPI_PORT_CTRL(port) :
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MIPI_PORT_CTRL(port);
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dpi_enabled = I915_READ(ctrl_reg) & DPI_ENABLE;
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/* Due to some hardware limitations on BYT, MIPI Port C DPI
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* Enable bit does not get set. To check whether DSI Port C
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