Commit 7dee06bc authored by Mika Kahola's avatar Mika Kahola Committed by Radhakrishna Sripada
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drm/i915/mtl: Readout Thunderbolt HW state 



Readout hw state for Thunderbolt.

Reviewed-by: default avatarRadhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: default avatarMika Kahola <mika.kahola@intel.com>
Signed-off-by: default avatarRadhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230428095433.4109054-9-mika.kahola@intel.com
parent 73fc3abc

drivers/gpu/drm/i915/display/intel_cx0_phy.c

+27 −0
Original line number Diff line number Diff line
@@ -2685,6 +2685,33 @@ static void intel_cx0pll_enable(struct intel_encoder *encoder, 
	intel_cx0_phy_transaction_end(encoder, wakeref);

}



int intel_mtl_tbt_calc_port_clock(struct intel_encoder *encoder)

{

	struct drm_i915_private *i915 = to_i915(encoder->base.dev);

	u32 clock;

	u32 val = intel_de_read(i915, XELPDP_PORT_CLOCK_CTL(encoder->port));



	clock = REG_FIELD_GET(XELPDP_DDI_CLOCK_SELECT_MASK, val);



	drm_WARN_ON(&i915->drm, !(val & XELPDP_FORWARD_CLOCK_UNGATE));

	drm_WARN_ON(&i915->drm, !(val & XELPDP_TBT_CLOCK_REQUEST));

	drm_WARN_ON(&i915->drm, !(val & XELPDP_TBT_CLOCK_ACK));



	switch (clock) {

	case XELPDP_DDI_CLOCK_SELECT_TBT_162:

		return 162000;

	case XELPDP_DDI_CLOCK_SELECT_TBT_270:

		return 270000;

	case XELPDP_DDI_CLOCK_SELECT_TBT_540:

		return 540000;

	case XELPDP_DDI_CLOCK_SELECT_TBT_810:

		return 810000;

	default:

		MISSING_CASE(clock);

		return 162000;

	}

}



static int intel_mtl_tbt_clock_select(struct drm_i915_private *i915, int clock)

{

	switch (clock) {

drivers/gpu/drm/i915/display/intel_cx0_phy.h

+1 −1
Original line number Diff line number Diff line
@@ -42,5 +42,5 @@ int intel_cx0_phy_check_hdmi_link_rate(struct intel_hdmi *hdmi, int clock); 
void intel_cx0_phy_ddi_vswing_sequence(struct intel_encoder *encoder,

				       const struct intel_crtc_state *crtc_state,

				       u32 level);

int intel_mtl_tbt_readout_hw_state(struct intel_encoder *encoder);

int intel_mtl_tbt_calc_port_clock(struct intel_encoder *encoder);

#endif /* __INTEL_CX0_PHY_H__ */

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

+4 −1
Original line number Diff line number Diff line
@@ -3852,8 +3852,11 @@ static void mtl_ddi_get_config(struct intel_encoder *encoder, 
{

	struct drm_i915_private *i915 = to_i915(encoder->base.dev);

	enum phy phy = intel_port_to_phy(i915, encoder->port);

	struct intel_digital_port *dig_port = enc_to_dig_port(encoder);



	if (intel_is_c10phy(i915, phy)) {

	if (intel_tc_port_in_tbt_alt_mode(dig_port)) {

		crtc_state->port_clock = intel_mtl_tbt_calc_port_clock(encoder);

	} else if (intel_is_c10phy(i915, phy)) {

		intel_c10pll_readout_hw_state(encoder, &crtc_state->cx0pll_state.c10);

		intel_c10pll_dump_hw_state(i915, &crtc_state->cx0pll_state.c10);

		crtc_state->port_clock = intel_c10pll_calc_port_clock(encoder, &crtc_state->cx0pll_state.c10);