[Intel-gfx] [PATCH 03/23] drm/i915: Move the TypeC port handling code to a separate file
Jani Nikula
jani.nikula at linux.intel.com
Thu Jun 6 08:43:12 UTC 2019
On Thu, 06 Jun 2019, Jani Nikula <jani.nikula at linux.intel.com> wrote:
> On Tue, 04 Jun 2019, Imre Deak <imre.deak at intel.com> wrote:
>> Move the TypeC port handling functions to a new file for clarity.
>>
>> While at it:
>> - s/icl_tc_port_connected()/intel_tc_port_connected()/
>> icl_tc_phy_disconnect(), will be unexported later.
>>
>> - s/intel_dp_get_fia_supported_lane_count()/intel_tc_port_fia_max_lane_count()/
>> It's used for HDMI legacy mode too.
>>
>> - Simplify function interfaces by passing only dig_port to them.
>>
>> No functional changes.
>
> Some nitpicks below.
Forgot,
Acked-by: Jani Nikula <jani.nikula at intel.com>
on the idea.
>
> BR,
> Jani.
>
>
>>
>> Cc: Animesh Manna <animesh.manna at intel.com>
>> Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
>> Cc: José Roberto de Souza <jose.souza at intel.com>
>> Signed-off-by: Imre Deak <imre.deak at intel.com>
>> ---
>> drivers/gpu/drm/i915/Makefile | 3 +-
>> drivers/gpu/drm/i915/Makefile.header-test | 1 +
>> drivers/gpu/drm/i915/intel_ddi.c | 6 +-
>> drivers/gpu/drm/i915/intel_dp.c | 227 +--------------------
>> drivers/gpu/drm/i915/intel_dp.h | 2 -
>> drivers/gpu/drm/i915/intel_tc.c | 230 ++++++++++++++++++++++
>> drivers/gpu/drm/i915/intel_tc.h | 13 ++
>> 7 files changed, 252 insertions(+), 230 deletions(-)
>> create mode 100644 drivers/gpu/drm/i915/intel_tc.c
>> create mode 100644 drivers/gpu/drm/i915/intel_tc.h
>>
>> diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
>> index c0a7b2994077..74c4d11d83eb 100644
>> --- a/drivers/gpu/drm/i915/Makefile
>> +++ b/drivers/gpu/drm/i915/Makefile
>> @@ -171,7 +171,8 @@ i915-y += intel_audio.o \
>> intel_psr.o \
>> intel_quirks.o \
>> intel_sideband.o \
>> - intel_sprite.o
>> + intel_sprite.o \
>> + intel_tc.o
>> i915-$(CONFIG_ACPI) += intel_acpi.o intel_opregion.o
>> i915-$(CONFIG_DRM_FBDEV_EMULATION) += intel_fbdev.o
>>
>> diff --git a/drivers/gpu/drm/i915/Makefile.header-test b/drivers/gpu/drm/i915/Makefile.header-test
>> index 6ef3b647ac65..e80e8e45b09c 100644
>> --- a/drivers/gpu/drm/i915/Makefile.header-test
>> +++ b/drivers/gpu/drm/i915/Makefile.header-test
>> @@ -58,6 +58,7 @@ header_test := \
>> intel_sdvo.h \
>> intel_sideband.h \
>> intel_sprite.h \
>> + intel_tc.h \
>> intel_tv.h \
>> intel_uncore.h \
>> intel_vdsc.h \
>> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
>> index 350eaf54f01f..5a1c98438375 100644
>> --- a/drivers/gpu/drm/i915/intel_ddi.c
>> +++ b/drivers/gpu/drm/i915/intel_ddi.c
>> @@ -45,6 +45,7 @@
>> #include "intel_lspcon.h"
>> #include "intel_panel.h"
>> #include "intel_psr.h"
>> +#include "intel_tc.h"
>> #include "intel_vdsc.h"
>>
>> struct ddi_buf_trans {
>> @@ -3904,7 +3905,6 @@ static int intel_ddi_compute_config(struct intel_encoder *encoder,
>> static void intel_ddi_encoder_suspend(struct intel_encoder *encoder)
>> {
>> struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
>> - struct drm_i915_private *i915 = to_i915(encoder->base.dev);
>>
>> intel_dp_encoder_suspend(encoder);
>>
>> @@ -3914,7 +3914,7 @@ static void intel_ddi_encoder_suspend(struct intel_encoder *encoder)
>> * even if the sink has disappeared while being suspended.
>> */
>> if (dig_port->tc_legacy_port)
>> - icl_tc_phy_disconnect(i915, dig_port);
>> + icl_tc_phy_disconnect(dig_port);
>> }
>>
>> static void intel_ddi_encoder_reset(struct drm_encoder *drm_encoder)
>> @@ -3936,7 +3936,7 @@ static void intel_ddi_encoder_destroy(struct drm_encoder *encoder)
>> intel_dp_encoder_flush_work(encoder);
>>
>> if (intel_port_is_tc(i915, dig_port->base.port))
>> - icl_tc_phy_disconnect(i915, dig_port);
>> + icl_tc_phy_disconnect(dig_port);
>>
>> drm_encoder_cleanup(encoder);
>> kfree(dig_port);
>> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
>> index 24b56b2a76c8..b69310bd9914 100644
>> --- a/drivers/gpu/drm/i915/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/intel_dp.c
>> @@ -62,6 +62,7 @@
>> #include "intel_panel.h"
>> #include "intel_psr.h"
>> #include "intel_sideband.h"
>> +#include "intel_tc.h"
>> #include "intel_vdsc.h"
>>
>> #define DP_DPRX_ESI_LEN 14
>> @@ -211,46 +212,13 @@ static int intel_dp_max_common_rate(struct intel_dp *intel_dp)
>> return intel_dp->common_rates[intel_dp->num_common_rates - 1];
>> }
>>
>> -static int intel_dp_get_fia_supported_lane_count(struct intel_dp *intel_dp)
>> -{
>> - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
>> - struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
>> - enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
>> - intel_wakeref_t wakeref;
>> - u32 lane_info;
>> -
>> - if (tc_port == PORT_TC_NONE || dig_port->tc_type != TC_PORT_TYPEC)
>> - return 4;
>> -
>> - lane_info = 0;
>> - with_intel_display_power(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref)
>> - lane_info = (I915_READ(PORT_TX_DFLEXDPSP) &
>> - DP_LANE_ASSIGNMENT_MASK(tc_port)) >>
>> - DP_LANE_ASSIGNMENT_SHIFT(tc_port);
>> -
>> - switch (lane_info) {
>> - default:
>> - MISSING_CASE(lane_info);
>> - case 1:
>> - case 2:
>> - case 4:
>> - case 8:
>> - return 1;
>> - case 3:
>> - case 12:
>> - return 2;
>> - case 15:
>> - return 4;
>> - }
>> -}
>> -
>> /* Theoretical max between source and sink */
>> static int intel_dp_max_common_lane_count(struct intel_dp *intel_dp)
>> {
>> struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
>> int source_max = intel_dig_port->max_lanes;
>> int sink_max = drm_dp_max_lane_count(intel_dp->dpcd);
>> - int fia_max = intel_dp_get_fia_supported_lane_count(intel_dp);
>> + int fia_max = intel_tc_port_fia_max_lane_count(intel_dig_port);
>>
>> return min3(source_max, sink_max, fia_max);
>> }
>> @@ -5231,195 +5199,6 @@ static bool icl_combo_port_connected(struct drm_i915_private *dev_priv,
>> return I915_READ(SDEISR) & SDE_DDI_HOTPLUG_ICP(port);
>> }
>>
>> -static const char *tc_type_name(enum tc_port_type type)
>> -{
>> - static const char * const names[] = {
>> - [TC_PORT_UNKNOWN] = "unknown",
>> - [TC_PORT_LEGACY] = "legacy",
>> - [TC_PORT_TYPEC] = "typec",
>> - [TC_PORT_TBT] = "tbt",
>> - };
>> -
>> - if (WARN_ON(type >= ARRAY_SIZE(names)))
>> - type = TC_PORT_UNKNOWN;
>> -
>> - return names[type];
>> -}
>> -
>> -static void icl_update_tc_port_type(struct drm_i915_private *dev_priv,
>> - struct intel_digital_port *intel_dig_port,
>> - bool is_legacy, bool is_typec, bool is_tbt)
>> -{
>> - enum port port = intel_dig_port->base.port;
>> - enum tc_port_type old_type = intel_dig_port->tc_type;
>> -
>> - WARN_ON(is_legacy + is_typec + is_tbt != 1);
>> -
>> - if (is_legacy)
>> - intel_dig_port->tc_type = TC_PORT_LEGACY;
>> - else if (is_typec)
>> - intel_dig_port->tc_type = TC_PORT_TYPEC;
>> - else if (is_tbt)
>> - intel_dig_port->tc_type = TC_PORT_TBT;
>> - else
>> - return;
>> -
>> - /* Types are not supposed to be changed at runtime. */
>> - WARN_ON(old_type != TC_PORT_UNKNOWN &&
>> - old_type != intel_dig_port->tc_type);
>> -
>> - if (old_type != intel_dig_port->tc_type)
>> - DRM_DEBUG_KMS("Port %c has TC type %s\n", port_name(port),
>> - tc_type_name(intel_dig_port->tc_type));
>> -}
>> -
>> -/*
>> - * This function implements the first part of the Connect Flow described by our
>> - * specification, Gen11 TypeC Programming chapter. The rest of the flow (reading
>> - * lanes, EDID, etc) is done as needed in the typical places.
>> - *
>> - * Unlike the other ports, type-C ports are not available to use as soon as we
>> - * get a hotplug. The type-C PHYs can be shared between multiple controllers:
>> - * display, USB, etc. As a result, handshaking through FIA is required around
>> - * connect and disconnect to cleanly transfer ownership with the controller and
>> - * set the type-C power state.
>> - *
>> - * We could opt to only do the connect flow when we actually try to use the AUX
>> - * channels or do a modeset, then immediately run the disconnect flow after
>> - * usage, but there are some implications on this for a dynamic environment:
>> - * things may go away or change behind our backs. So for now our driver is
>> - * always trying to acquire ownership of the controller as soon as it gets an
>> - * interrupt (or polls state and sees a port is connected) and only gives it
>> - * back when it sees a disconnect. Implementation of a more fine-grained model
>> - * will require a lot of coordination with user space and thorough testing for
>> - * the extra possible cases.
>> - */
>> -static bool icl_tc_phy_connect(struct drm_i915_private *dev_priv,
>> - struct intel_digital_port *dig_port)
>> -{
>> - enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
>> - u32 val;
>> -
>> - if (dig_port->tc_type != TC_PORT_LEGACY &&
>> - dig_port->tc_type != TC_PORT_TYPEC)
>> - return true;
>> -
>> - val = I915_READ(PORT_TX_DFLEXDPPMS);
>> - if (!(val & DP_PHY_MODE_STATUS_COMPLETED(tc_port))) {
>> - DRM_DEBUG_KMS("DP PHY for TC port %d not ready\n", tc_port);
>> - WARN_ON(dig_port->tc_legacy_port);
>> - return false;
>> - }
>> -
>> - /*
>> - * This function may be called many times in a row without an HPD event
>> - * in between, so try to avoid the write when we can.
>> - */
>> - val = I915_READ(PORT_TX_DFLEXDPCSSS);
>> - if (!(val & DP_PHY_MODE_STATUS_NOT_SAFE(tc_port))) {
>> - val |= DP_PHY_MODE_STATUS_NOT_SAFE(tc_port);
>> - I915_WRITE(PORT_TX_DFLEXDPCSSS, val);
>> - }
>> -
>> - /*
>> - * Now we have to re-check the live state, in case the port recently
>> - * became disconnected. Not necessary for legacy mode.
>> - */
>> - if (dig_port->tc_type == TC_PORT_TYPEC &&
>> - !(I915_READ(PORT_TX_DFLEXDPSP) & TC_LIVE_STATE_TC(tc_port))) {
>> - DRM_DEBUG_KMS("TC PHY %d sudden disconnect.\n", tc_port);
>> - icl_tc_phy_disconnect(dev_priv, dig_port);
>> - return false;
>> - }
>> -
>> - return true;
>> -}
>> -
>> -/*
>> - * See the comment at the connect function. This implements the Disconnect
>> - * Flow.
>> - */
>> -void icl_tc_phy_disconnect(struct drm_i915_private *dev_priv,
>> - struct intel_digital_port *dig_port)
>> -{
>> - enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
>> -
>> - if (dig_port->tc_type == TC_PORT_UNKNOWN)
>> - return;
>> -
>> - /*
>> - * TBT disconnection flow is read the live status, what was done in
>> - * caller.
>> - */
>> - if (dig_port->tc_type == TC_PORT_TYPEC ||
>> - dig_port->tc_type == TC_PORT_LEGACY) {
>> - u32 val;
>> -
>> - val = I915_READ(PORT_TX_DFLEXDPCSSS);
>> - val &= ~DP_PHY_MODE_STATUS_NOT_SAFE(tc_port);
>> - I915_WRITE(PORT_TX_DFLEXDPCSSS, val);
>> - }
>> -
>> - DRM_DEBUG_KMS("Port %c TC type %s disconnected\n",
>> - port_name(dig_port->base.port),
>> - tc_type_name(dig_port->tc_type));
>> -
>> - dig_port->tc_type = TC_PORT_UNKNOWN;
>> -}
>> -
>> -/*
>> - * The type-C ports are different because even when they are connected, they may
>> - * not be available/usable by the graphics driver: see the comment on
>> - * icl_tc_phy_connect(). So in our driver instead of adding the additional
>> - * concept of "usable" and make everything check for "connected and usable" we
>> - * define a port as "connected" when it is not only connected, but also when it
>> - * is usable by the rest of the driver. That maintains the old assumption that
>> - * connected ports are usable, and avoids exposing to the users objects they
>> - * can't really use.
>> - */
>> -static bool icl_tc_port_connected(struct drm_i915_private *dev_priv,
>> - struct intel_digital_port *intel_dig_port)
>> -{
>> - enum port port = intel_dig_port->base.port;
>> - enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
>> - bool is_legacy, is_typec, is_tbt;
>> - u32 dpsp;
>> -
>> - /*
>> - * Complain if we got a legacy port HPD, but VBT didn't mark the port as
>> - * legacy. Treat the port as legacy from now on.
>> - */
>> - if (!intel_dig_port->tc_legacy_port &&
>> - I915_READ(SDEISR) & SDE_TC_HOTPLUG_ICP(tc_port)) {
>> - DRM_ERROR("VBT incorrectly claims port %c is not TypeC legacy\n",
>> - port_name(port));
>> - intel_dig_port->tc_legacy_port = true;
>> - }
>> - is_legacy = intel_dig_port->tc_legacy_port;
>> -
>> - /*
>> - * The spec says we shouldn't be using the ISR bits for detecting
>> - * between TC and TBT. We should use DFLEXDPSP.
>> - */
>> - dpsp = I915_READ(PORT_TX_DFLEXDPSP);
>> - is_typec = dpsp & TC_LIVE_STATE_TC(tc_port);
>> - is_tbt = dpsp & TC_LIVE_STATE_TBT(tc_port);
>> -
>> - if (!is_legacy && !is_typec && !is_tbt) {
>> - icl_tc_phy_disconnect(dev_priv, intel_dig_port);
>> -
>> - return false;
>> - }
>> -
>> - icl_update_tc_port_type(dev_priv, intel_dig_port, is_legacy, is_typec,
>> - is_tbt);
>> -
>> - if (!icl_tc_phy_connect(dev_priv, intel_dig_port))
>> - return false;
>> -
>> - return true;
>> -}
>> -
>> static bool icl_digital_port_connected(struct intel_encoder *encoder)
>> {
>> struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
>> @@ -5428,7 +5207,7 @@ static bool icl_digital_port_connected(struct intel_encoder *encoder)
>> if (intel_port_is_combophy(dev_priv, encoder->port))
>> return icl_combo_port_connected(dev_priv, dig_port);
>> else if (intel_port_is_tc(dev_priv, encoder->port))
>> - return icl_tc_port_connected(dev_priv, dig_port);
>> + return intel_tc_port_connected(dig_port);
>> else
>> MISSING_CASE(encoder->hpd_pin);
>>
>> diff --git a/drivers/gpu/drm/i915/intel_dp.h b/drivers/gpu/drm/i915/intel_dp.h
>> index da70b1a41c83..657bbb1f5ed0 100644
>> --- a/drivers/gpu/drm/i915/intel_dp.h
>> +++ b/drivers/gpu/drm/i915/intel_dp.h
>> @@ -112,8 +112,6 @@ bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp);
>> int intel_dp_link_required(int pixel_clock, int bpp);
>> int intel_dp_max_data_rate(int max_link_clock, int max_lanes);
>> bool intel_digital_port_connected(struct intel_encoder *encoder);
>> -void icl_tc_phy_disconnect(struct drm_i915_private *dev_priv,
>> - struct intel_digital_port *dig_port);
>>
>> static inline unsigned int intel_dp_unused_lane_mask(int lane_count)
>> {
>> diff --git a/drivers/gpu/drm/i915/intel_tc.c b/drivers/gpu/drm/i915/intel_tc.c
>> new file mode 100644
>> index 000000000000..7a1b5870945f
>> --- /dev/null
>> +++ b/drivers/gpu/drm/i915/intel_tc.c
>> @@ -0,0 +1,230 @@
>> +// SPDX-License-Identifier: MIT
>> +/*
>> + * Copyright © 2019 Intel Corporation
>> + */
>
> From the Nitpicks Department, please add a blank line here.
>
>> +#include "intel_display.h"
>> +#include "i915_drv.h"
>> +#include "intel_tc.h"
>
> And sort the includes.
>
>> +
>> +static const char *tc_type_name(enum tc_port_type type)
>> +{
>> + static const char * const names[] = {
>> + [TC_PORT_UNKNOWN] = "unknown",
>> + [TC_PORT_LEGACY] = "legacy",
>> + [TC_PORT_TYPEC] = "typec",
>> + [TC_PORT_TBT] = "tbt",
>> + };
>> +
>> + if (WARN_ON(type >= ARRAY_SIZE(names)))
>> + type = TC_PORT_UNKNOWN;
>> +
>> + return names[type];
>> +}
>> +
>> +int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port)
>> +{
>> + struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
>> + enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
>> + intel_wakeref_t wakeref;
>> + u32 lane_info;
>> +
>> + if (tc_port == PORT_TC_NONE || dig_port->tc_type != TC_PORT_TYPEC)
>> + return 4;
>> +
>> + lane_info = 0;
>> + with_intel_display_power(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref)
>> + lane_info = (I915_READ(PORT_TX_DFLEXDPSP) &
>> + DP_LANE_ASSIGNMENT_MASK(tc_port)) >>
>> + DP_LANE_ASSIGNMENT_SHIFT(tc_port);
>> +
>> + switch (lane_info) {
>> + default:
>> + MISSING_CASE(lane_info);
>> + case 1:
>> + case 2:
>> + case 4:
>> + case 8:
>> + return 1;
>> + case 3:
>> + case 12:
>> + return 2;
>> + case 15:
>> + return 4;
>> + }
>> +}
>> +
>> +/*
>> + * This function implements the first part of the Connect Flow described by our
>> + * specification, Gen11 TypeC Programming chapter. The rest of the flow (reading
>> + * lanes, EDID, etc) is done as needed in the typical places.
>> + *
>> + * Unlike the other ports, type-C ports are not available to use as soon as we
>> + * get a hotplug. The type-C PHYs can be shared between multiple controllers:
>> + * display, USB, etc. As a result, handshaking through FIA is required around
>> + * connect and disconnect to cleanly transfer ownership with the controller and
>> + * set the type-C power state.
>> + *
>> + * We could opt to only do the connect flow when we actually try to use the AUX
>> + * channels or do a modeset, then immediately run the disconnect flow after
>> + * usage, but there are some implications on this for a dynamic environment:
>> + * things may go away or change behind our backs. So for now our driver is
>> + * always trying to acquire ownership of the controller as soon as it gets an
>> + * interrupt (or polls state and sees a port is connected) and only gives it
>> + * back when it sees a disconnect. Implementation of a more fine-grained model
>> + * will require a lot of coordination with user space and thorough testing for
>> + * the extra possible cases.
>> + */
>> +static bool icl_tc_phy_connect(struct intel_digital_port *dig_port)
>> +{
>> + struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
>> + enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
>> + u32 val;
>> +
>> + if (dig_port->tc_type != TC_PORT_LEGACY &&
>> + dig_port->tc_type != TC_PORT_TYPEC)
>> + return true;
>> +
>> + val = I915_READ(PORT_TX_DFLEXDPPMS);
>> + if (!(val & DP_PHY_MODE_STATUS_COMPLETED(tc_port))) {
>> + DRM_DEBUG_KMS("DP PHY for TC port %d not ready\n", tc_port);
>> + WARN_ON(dig_port->tc_legacy_port);
>> + return false;
>> + }
>> +
>> + /*
>> + * This function may be called many times in a row without an HPD event
>> + * in between, so try to avoid the write when we can.
>> + */
>> + val = I915_READ(PORT_TX_DFLEXDPCSSS);
>> + if (!(val & DP_PHY_MODE_STATUS_NOT_SAFE(tc_port))) {
>> + val |= DP_PHY_MODE_STATUS_NOT_SAFE(tc_port);
>> + I915_WRITE(PORT_TX_DFLEXDPCSSS, val);
>> + }
>> +
>> + /*
>> + * Now we have to re-check the live state, in case the port recently
>> + * became disconnected. Not necessary for legacy mode.
>> + */
>> + if (dig_port->tc_type == TC_PORT_TYPEC &&
>> + !(I915_READ(PORT_TX_DFLEXDPSP) & TC_LIVE_STATE_TC(tc_port))) {
>> + DRM_DEBUG_KMS("TC PHY %d sudden disconnect.\n", tc_port);
>> + icl_tc_phy_disconnect(dig_port);
>> + return false;
>> + }
>> +
>> + return true;
>> +}
>> +
>> +/*
>> + * See the comment at the connect function. This implements the Disconnect
>> + * Flow.
>> + */
>> +void icl_tc_phy_disconnect(struct intel_digital_port *dig_port)
>> +{
>> + struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
>> + enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
>> +
>> + if (dig_port->tc_type == TC_PORT_UNKNOWN)
>> + return;
>> +
>> + /*
>> + * TBT disconnection flow is read the live status, what was done in
>> + * caller.
>> + */
>> + if (dig_port->tc_type == TC_PORT_TYPEC ||
>> + dig_port->tc_type == TC_PORT_LEGACY) {
>> + u32 val;
>> +
>> + val = I915_READ(PORT_TX_DFLEXDPCSSS);
>> + val &= ~DP_PHY_MODE_STATUS_NOT_SAFE(tc_port);
>> + I915_WRITE(PORT_TX_DFLEXDPCSSS, val);
>> + }
>> +
>> + DRM_DEBUG_KMS("Port %c TC type %s disconnected\n",
>> + port_name(dig_port->base.port),
>> + tc_type_name(dig_port->tc_type));
>> +
>> + dig_port->tc_type = TC_PORT_UNKNOWN;
>> +}
>> +
>> +static void icl_update_tc_port_type(struct drm_i915_private *dev_priv,
>> + struct intel_digital_port *intel_dig_port,
>> + bool is_legacy, bool is_typec, bool is_tbt)
>> +{
>> + enum port port = intel_dig_port->base.port;
>> + enum tc_port_type old_type = intel_dig_port->tc_type;
>> +
>> + WARN_ON(is_legacy + is_typec + is_tbt != 1);
>> +
>> + if (is_legacy)
>> + intel_dig_port->tc_type = TC_PORT_LEGACY;
>> + else if (is_typec)
>> + intel_dig_port->tc_type = TC_PORT_TYPEC;
>> + else if (is_tbt)
>> + intel_dig_port->tc_type = TC_PORT_TBT;
>> + else
>> + return;
>> +
>> + /* Types are not supposed to be changed at runtime. */
>> + WARN_ON(old_type != TC_PORT_UNKNOWN &&
>> + old_type != intel_dig_port->tc_type);
>> +
>> + if (old_type != intel_dig_port->tc_type)
>> + DRM_DEBUG_KMS("Port %c has TC type %s\n", port_name(port),
>> + tc_type_name(intel_dig_port->tc_type));
>> +}
>> +
>> +
>> +/*
>> + * The type-C ports are different because even when they are connected, they may
>> + * not be available/usable by the graphics driver: see the comment on
>> + * icl_tc_phy_connect(). So in our driver instead of adding the additional
>> + * concept of "usable" and make everything check for "connected and usable" we
>> + * define a port as "connected" when it is not only connected, but also when it
>> + * is usable by the rest of the driver. That maintains the old assumption that
>> + * connected ports are usable, and avoids exposing to the users objects they
>> + * can't really use.
>> + */
>> +bool intel_tc_port_connected(struct intel_digital_port *dig_port)
>> +{
>> + struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
>> + enum port port = dig_port->base.port;
>> + enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
>> + bool is_legacy, is_typec, is_tbt;
>> + u32 dpsp;
>> +
>> + /*
>> + * Complain if we got a legacy port HPD, but VBT didn't mark the port as
>> + * legacy. Treat the port as legacy from now on.
>> + */
>> + if (!dig_port->tc_legacy_port &&
>> + I915_READ(SDEISR) & SDE_TC_HOTPLUG_ICP(tc_port)) {
>> + DRM_ERROR("VBT incorrectly claims port %c is not TypeC legacy\n",
>> + port_name(port));
>> + dig_port->tc_legacy_port = true;
>> + }
>> + is_legacy = dig_port->tc_legacy_port;
>> +
>> + /*
>> + * The spec says we shouldn't be using the ISR bits for detecting
>> + * between TC and TBT. We should use DFLEXDPSP.
>> + */
>> + dpsp = I915_READ(PORT_TX_DFLEXDPSP);
>> + is_typec = dpsp & TC_LIVE_STATE_TC(tc_port);
>> + is_tbt = dpsp & TC_LIVE_STATE_TBT(tc_port);
>> +
>> + if (!is_legacy && !is_typec && !is_tbt) {
>> + icl_tc_phy_disconnect(dig_port);
>> +
>> + return false;
>> + }
>> +
>> + icl_update_tc_port_type(dev_priv, dig_port, is_legacy, is_typec,
>> + is_tbt);
>> +
>> + if (!icl_tc_phy_connect(dig_port))
>> + return false;
>> +
>> + return true;
>> +}
>> +
>> diff --git a/drivers/gpu/drm/i915/intel_tc.h b/drivers/gpu/drm/i915/intel_tc.h
>> new file mode 100644
>> index 000000000000..94c62ac4a162
>> --- /dev/null
>> +++ b/drivers/gpu/drm/i915/intel_tc.h
>> @@ -0,0 +1,13 @@
>
> SPDX header here please.
>
>> +#ifndef __INTEL_TC_H__
>> +#define __INTEL_TC_H__
>> +
>> +#include <linux/types.h>
>> +
>> +struct intel_digital_port;
>> +
>> +void icl_tc_phy_disconnect(struct intel_digital_port *dig_port);
>
> I'd like to see this named intel_tc_* in the future.
>
> BR,
> Jani.
>
>
>> +
>> +bool intel_tc_port_connected(struct intel_digital_port *dig_port);
>> +int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port);
>> +
>> +#endif /* __INTEL_TC_H__ */
--
Jani Nikula, Intel Open Source Graphics Center
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