drm/i915/dsi: Do not read the transcoder register. (6d73af27) · Commits · 戴 / test

As per the Bspec, port mapping is fixed for mipi dsi. v2: Reuse the existing function (Jani) Signed-off-by:

drivers/gpu/drm/i915/display/intel_display.c

+11 −6

Original line number	Diff line number	Diff line
		@@ -10577,16 +10577,21 @@ static void haswell_get_ddi_port_state(struct intel_crtc *crtc,
		struct intel_crtc_state *pipe_config)
		{
		struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
		enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
		struct intel_shared_dpll *pll;
		enum port port;
		u32 tmp;

		tmp = I915_READ(TRANS_DDI_FUNC_CTL(pipe_config->cpu_transcoder));

		if (transcoder_is_dsi(cpu_transcoder)) {
		port = (cpu_transcoder == TRANSCODER_DSI_A) ?
		PORT_A : PORT_B;
		} else {
		tmp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
		if (INTEL_GEN(dev_priv) >= 12)
		port = TGL_TRANS_DDI_FUNC_CTL_VAL_TO_PORT(tmp);
		else
		port = TRANS_DDI_FUNC_CTL_VAL_TO_PORT(tmp);
		}

		if (INTEL_GEN(dev_priv) >= 11)
		icelake_get_ddi_pll(dev_priv, port, pipe_config);