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drm/i915/mtl: Readout Thunderbolt HW state

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Readout hw state for Thunderbolt.

Reviewed-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230428095433.4109054-9-mika.kahola@intel.com
This commit is contained in:
Mika Kahola
2023-04-28 12:54:28 +03:00
committed by Radhakrishna Sripada
parent 73fc3abcb7
commit 7dee06bc0f
3 changed files with 32 additions and 2 deletions
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27
drivers/gpu/drm/i915/display/intel_cx0_phy.c
View File

@@ -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) {

2
drivers/gpu/drm/i915/display/intel_cx0_phy.h
View File

@@ -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__ */

5
drivers/gpu/drm/i915/display/intel_ddi.c
View File

@@ -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);