drm/i915/tgl: add support to one DP-MST stream (b3545e08) · Commits · 戴 / test

This is the minimum change to support 1 (and only 1) DP-MST monitor connected on Tiger Lake. This change was isolated from previous patch from José. In order to support more streams we will need to create a master-slave relation on the transcoders and that is not currently working yet. v2: remove unused macro and use REG_FIELD_PREP() (Ville) Signed-off-by:

Lucas De Marchi <lucas.demarchi@intel.com> Reviewed-by:

José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191029035049.5907-1-lucas.demarchi@intel.com

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

+3 −0

Original line number	Diff line number	Diff line
		@@ -1905,6 +1905,9 @@ intel_ddi_transcoder_func_reg_val_get(const struct intel_crtc_state *crtc_state)
		} else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DP_MST)) {
		temp \|= TRANS_DDI_MODE_SELECT_DP_MST;
		temp \|= DDI_PORT_WIDTH(crtc_state->lane_count);

		if (INTEL_GEN(dev_priv) >= 12)
		temp \|= TRANS_DDI_MST_TRANSPORT_SELECT(crtc_state->cpu_transcoder);
		} else {
		temp \|= TRANS_DDI_MODE_SELECT_DP_SST;
		temp \|= DDI_PORT_WIDTH(crtc_state->lane_count);

drivers/gpu/drm/i915/i915_reg.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -9657,6 +9657,9 @@ enum skl_power_gate {
		#define TRANS_DDI_EDP_INPUT_A_ONOFF (4 << 12)
		#define TRANS_DDI_EDP_INPUT_B_ONOFF (5 << 12)
		#define TRANS_DDI_EDP_INPUT_C_ONOFF (6 << 12)
		#define TRANS_DDI_MST_TRANSPORT_SELECT_MASK REG_GENMASK(12, 10)
		#define TRANS_DDI_MST_TRANSPORT_SELECT(trans) \
		REG_FIELD_PREP(TRANS_DDI_MST_TRANSPORT_SELECT_MASK, trans)
		#define TRANS_DDI_HDCP_SIGNALLING (1 << 9)
		#define TRANS_DDI_DP_VC_PAYLOAD_ALLOC (1 << 8)
		#define TRANS_DDI_HDMI_SCRAMBLER_CTS_ENABLE (1 << 7)

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