drm/i915: allow platforms without eDP transcoder

Define a HAS_TRANSCODER_EDP() macro that checks if we have defined an
offset for this transcoder. This allows platforms to be defined without
eDP transcoder.

Cc: Mika Kahola <mika.kahola@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190222230254.20351-2-lucas.demarchi@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -2506,6 +2506,7 @@ static inline unsigned int i915_sg_segment_size(void)
 #define HAS_DDI(dev_priv)		 (INTEL_INFO(dev_priv)->display.has_ddi)
 #define HAS_FPGA_DBG_UNCLAIMED(dev_priv) (INTEL_INFO(dev_priv)->has_fpga_dbg)
 #define HAS_PSR(dev_priv)		 (INTEL_INFO(dev_priv)->display.has_psr)
+#define HAS_TRANSCODER_EDP(dev_priv)	 (INTEL_INFO(dev_priv)->trans_offsets[TRANSCODER_EDP] != 0)
 
 #define HAS_RC6(dev_priv)		 (INTEL_INFO(dev_priv)->has_rc6)
 #define HAS_RC6p(dev_priv)		 (INTEL_INFO(dev_priv)->has_rc6p)

drivers/gpu/drm/i915/intel_ddi.c

@@ -1911,7 +1911,7 @@ bool intel_ddi_connector_get_hw_state(struct intel_connector *intel_connector)
 		goto out;
 	}
 
-	if (port == PORT_A)
+	if (HAS_TRANSCODER_EDP(dev_priv) && port == PORT_A)
 		cpu_transcoder = TRANSCODER_EDP;
 	else
 		cpu_transcoder = (enum transcoder) pipe;
@@ -1973,7 +1973,7 @@ static void intel_ddi_get_encoder_pipes(struct intel_encoder *encoder,
 	if (!(tmp & DDI_BUF_CTL_ENABLE))
 		goto out;
 
-	if (port == PORT_A) {
+	if (HAS_TRANSCODER_EDP(dev_priv) && port == PORT_A) {
 		tmp = I915_READ(TRANS_DDI_FUNC_CTL(TRANSCODER_EDP));
 
 		switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
@@ -3871,7 +3871,7 @@ static int intel_ddi_compute_config(struct intel_encoder *encoder,
 	enum port port = encoder->port;
 	int ret;
 
-	if (port == PORT_A)
+	if (HAS_TRANSCODER_EDP(dev_priv) && port == PORT_A)
 		pipe_config->cpu_transcoder = TRANSCODER_EDP;
 
 	if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_HDMI))

drivers/gpu/drm/i915/intel_display.c

@@ -9688,7 +9688,7 @@ static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	enum intel_display_power_domain power_domain;
-	unsigned long panel_transcoder_mask = BIT(TRANSCODER_EDP);
+	unsigned long panel_transcoder_mask = 0;
 	unsigned long enabled_panel_transcoders = 0;
 	enum transcoder panel_transcoder;
 	u32 tmp;
@@ -9697,6 +9697,9 @@ static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
 		panel_transcoder_mask |=
 			BIT(TRANSCODER_DSI_0) | BIT(TRANSCODER_DSI_1);
 
+	if (HAS_TRANSCODER_EDP(dev_priv))
+		panel_transcoder_mask |= BIT(TRANSCODER_EDP);
+
 	/*
 	 * The pipe->transcoder mapping is fixed with the exception of the eDP
 	 * and DSI transcoders handled below.