- 根目录:
- drivers
- gpu
- drm
- i915
- intel_dp_mst.c
/*
* Copyright © 2008 Intel Corporation
* 2014 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
*/
#include <drm/drmP.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config)
{
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
struct intel_digital_port *intel_dig_port = intel_mst->primary;
struct intel_dp *intel_dp = &intel_dig_port->dp;
struct drm_atomic_state *state;
int bpp, i;
int lane_count, slots, rate;
struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
struct intel_connector *found = NULL;
int mst_pbn;
pipe_config->dp_encoder_is_mst = true;
pipe_config->has_pch_encoder = false;
pipe_config->has_dp_encoder = true;
bpp = 24;
/*
* for MST we always configure max link bw - the spec doesn't
* seem to suggest we should do otherwise.
*/
lane_count = drm_dp_max_lane_count(intel_dp->dpcd);
rate = intel_dp_max_link_rate(intel_dp);
if (intel_dp->num_sink_rates) {
intel_dp->link_bw = 0;
intel_dp->rate_select = intel_dp_rate_select(intel_dp, rate);
} else {
intel_dp->link_bw = drm_dp_link_rate_to_bw_code(rate);
intel_dp->rate_select = 0;
}
intel_dp->lane_count = lane_count;
pipe_config->pipe_bpp = 24;
pipe_config->port_clock = rate;
state = pipe_config->base.state;
for (i = 0; i < state->num_connector; i++) {
if (!state->connectors[i])
continue;
if (state->connector_states[i]->best_encoder == &encoder->base) {
found = to_intel_connector(state->connectors[i]);
break;
}
}
if (!found) {
DRM_ERROR("can't find connector\n");
return false;
}
mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->clock, bpp);
pipe_config->pbn = mst_pbn;
slots = drm_dp_find_vcpi_slots(&intel_dp->mst_mgr, mst_pbn);
intel_link_compute_m_n(bpp, lane_count,
adjusted_mode->crtc_clock,
pipe_config->port_clock,
&pipe_config->dp_m_n);
pipe_config->dp_m_n.tu = slots;
return true;
}
static void intel_mst_disable_dp(struct intel_encoder *encoder)
{
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
struct intel_digital_port *intel_dig_port = intel_mst->primary;
struct intel_dp *intel_dp = &intel_dig_port->dp;
int ret;
DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
drm_dp_mst_reset_vcpi_slots(&intel_dp->mst_mgr, intel_mst->port);
ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
if (ret) {
DRM_ERROR("failed to update payload %d\n", ret);
}
}
static void intel_mst_post_disable_dp(struct intel_encoder *encoder)
{
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
struct intel_digital_port *intel_dig_port = intel_mst->primary;
struct intel_dp *intel_dp = &intel_dig_port->dp;
DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
/* this can fail */
drm_dp_check_act_status(&intel_dp->mst_mgr);
/* and this can also fail */
drm_dp_update_payload_part2(&intel_dp->mst_mgr);
drm_dp_mst_deallocate_vcpi(&intel_dp->mst_mgr, intel_mst->port);
intel_dp->active_mst_links--;
intel_mst->port = NULL;
if (intel_dp->active_mst_links == 0) {
intel_dig_port->base.post_disable(&intel_dig_port->base);
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_OFF);
}
}
static void intel_mst_pre_enable_dp(struct intel_encoder *encoder)
{
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
struct intel_digital_port *intel_dig_port = intel_mst->primary;
struct intel_dp *intel_dp = &intel_dig_port->dp;
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
enum port port = intel_dig_port->port;
int ret;
uint32_t temp;
struct intel_connector *found = NULL, *intel_connector;
int slots;
struct drm_crtc *crtc = encoder->base.crtc;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
for_each_intel_connector(dev, intel_connector) {
if (intel_connector->new_encoder == encoder) {
found = intel_connector;
break;
}
}
if (!found) {
DRM_ERROR("can't find connector\n");
return;
}
DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
intel_mst->port = found->port;
if (intel_dp->active_mst_links == 0) {
enum port port = intel_ddi_get_encoder_port(encoder);
I915_WRITE(PORT_CLK_SEL(port),
intel_crtc->config->ddi_pll_sel);
intel_ddi_init_dp_buf_reg(&intel_dig_port->base);
intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
intel_dp_start_link_train(intel_dp);
intel_dp_complete_link_train(intel_dp);
intel_dp_stop_link_train(intel_dp);
}
ret = drm_dp_mst_allocate_vcpi(&intel_dp->mst_mgr,
intel_mst->port,
intel_crtc->config->pbn, &slots);
if (ret == false) {
DRM_ERROR("failed to allocate vcpi\n");
return;
}
intel_dp->active_mst_links++;
temp = I915_READ(DP_TP_STATUS(port));
I915_WRITE(DP_TP_STATUS(port), temp);
ret = drm_dp_update_payload_part1(&intel_dp->mst_mgr);
}
static void intel_mst_enable_dp(struct intel_encoder *encoder)
{
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
struct intel_digital_port *intel_dig_port = intel_mst->primary;
struct intel_dp *intel_dp = &intel_dig_port->dp;
struct drm_device *dev = intel_dig_port->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
enum port port = intel_dig_port->port;
int ret;
DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_ACT_SENT),
1))
DRM_ERROR("Timed out waiting for ACT sent\n");
ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
}
static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
enum pipe *pipe)
{
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
*pipe = intel_mst->pipe;
if (intel_mst->port)
return true;
return false;
}
static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config)
{
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
struct intel_digital_port *intel_dig_port = intel_mst->primary;
struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
u32 temp, flags = 0;
pipe_config->has_dp_encoder = true;
temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
if (temp & TRANS_DDI_PHSYNC)
flags |= DRM_MODE_FLAG_PHSYNC;
else
flags |= DRM_MODE_FLAG_NHSYNC;
if (temp & TRANS_DDI_PVSYNC)
flags |= DRM_MODE_FLAG_PVSYNC;
else
flags |= DRM_MODE_FLAG_NVSYNC;
switch (temp & TRANS_DDI_BPC_MASK) {
case TRANS_DDI_BPC_6:
pipe_config->pipe_bpp = 18;
break;
case TRANS_DDI_BPC_8:
pipe_config->pipe_bpp = 24;
break;
case TRANS_DDI_BPC_10:
pipe_config->pipe_bpp = 30;
break;
case TRANS_DDI_BPC_12:
pipe_config->pipe_bpp = 36;
break;
default:
break;
}
pipe_config->base.adjusted_mode.flags |= flags;
intel_dp_get_m_n(crtc, pipe_config);
intel_ddi_clock_get(&intel_dig_port->base, pipe_config);
}
static int intel_dp_mst_get_ddc_modes(struct drm_connector *connector)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
struct intel_dp *intel_dp = intel_connector->mst_port;
struct edid *edid;
int ret;
edid = drm_dp_mst_get_edid(connector, &intel_dp->mst_mgr, intel_connector->port);
if (!edid)
return 0;
ret = intel_connector_update_modes(connector, edid);
kfree(edid);
return ret;
}
static enum drm_connector_status
intel_dp_mst_detect(struct drm_connector *connector, bool force)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
struct intel_dp *intel_dp = intel_connector->mst_port;
return drm_dp_mst_detect_port(connector, &intel_dp->mst_mgr, intel_connector->port);
}
static int
intel_dp_mst_set_property(struct drm_connector *connector,
struct drm_property *property,
uint64_t val)
{
return 0;
}
static void
intel_dp_mst_connector_destroy(struct drm_connector *connector)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
if (!IS_ERR_OR_NULL(intel_connector->edid))
kfree(intel_connector->edid);
drm_connector_cleanup(connector);
kfree(connector);
}
static const struct drm_connector_funcs intel_dp_mst_connector_funcs = {
.dpms = intel_connector_dpms,
.detect = intel_dp_mst_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.set_property = intel_dp_mst_set_property,
.atomic_get_property = intel_connector_atomic_get_property,
.destroy = intel_dp_mst_connector_destroy,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
};
static int intel_dp_mst_get_modes(struct drm_connector *connector)
{
return intel_dp_mst_get_ddc_modes(connector);
}
static enum drm_mode_status
intel_dp_mst_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
/* TODO - validate mode against available PBN for link */
if (mode->clock < 10000)
return MODE_CLOCK_LOW;
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
return MODE_H_ILLEGAL;
return MODE_OK;
}
static struct drm_encoder *intel_mst_best_encoder(struct drm_connector *connector)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
struct intel_dp *intel_dp = intel_connector->mst_port;
return &intel_dp->mst_encoders[0]->base.base;
}
static const struct drm_connector_helper_funcs intel_dp_mst_connector_helper_funcs = {
.get_modes = intel_dp_mst_get_modes,
.mode_valid = intel_dp_mst_mode_valid,
.best_encoder = intel_mst_best_encoder,
};
static void intel_dp_mst_encoder_destroy(struct drm_encoder *encoder)
{
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
drm_encoder_cleanup(encoder);
kfree(intel_mst);
}
static const struct drm_encoder_funcs intel_dp_mst_enc_funcs = {
.destroy = intel_dp_mst_encoder_destroy,
};
static bool intel_dp_mst_get_hw_state(struct intel_connector *connector)
{
if (connector->encoder) {
enum pipe pipe;
if (!connector->encoder->get_hw_state(connector->encoder, &pipe))
return false;
return true;
}
return false;
}
static void intel_connector_add_to_fbdev(struct intel_connector *connector)
{
#ifdef CONFIG_DRM_I915_FBDEV
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
drm_fb_helper_add_one_connector(&dev_priv->fbdev->helper, &connector->base);
#endif
}
static void intel_connector_remove_from_fbdev(struct intel_connector *connector)
{
#ifdef CONFIG_DRM_I915_FBDEV
struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
drm_fb_helper_remove_one_connector(&dev_priv->fbdev->helper, &connector->base);
#endif
}
static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr, struct drm_dp_mst_port *port, const char *pathprop)
{
struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = intel_dig_port->base.base.dev;
struct intel_connector *intel_connector;
struct drm_connector *connector;
int i;
intel_connector = intel_connector_alloc();
if (!intel_connector)
return NULL;
connector = &intel_connector->base;
drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
intel_connector->unregister = intel_connector_unregister;
intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
intel_connector->mst_port = intel_dp;
intel_connector->port = port;
for (i = PIPE_A; i <= PIPE_C; i++) {
drm_mode_connector_attach_encoder(&intel_connector->base,
&intel_dp->mst_encoders[i]->base.base);
}
intel_dp_add_properties(intel_dp, connector);
drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
drm_mode_connector_set_path_property(connector, pathprop);
drm_reinit_primary_mode_group(dev);
mutex_lock(&dev->mode_config.mutex);
intel_connector_add_to_fbdev(intel_connector);
mutex_unlock(&dev->mode_config.mutex);
drm_connector_register(&intel_connector->base);
return connector;
}
static void intel_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
struct drm_connector *connector)
{
struct intel_connector *intel_connector = to_intel_connector(connector);
struct drm_device *dev = connector->dev;
/* need to nuke the connector */
mutex_lock(&dev->mode_config.mutex);
intel_connector_dpms(connector, DRM_MODE_DPMS_OFF);
mutex_unlock(&dev->mode_config.mutex);
intel_connector->unregister(intel_connector);
mutex_lock(&dev->mode_config.mutex);
intel_connector_remove_from_fbdev(intel_connector);
drm_connector_cleanup(connector);
mutex_unlock(&dev->mode_config.mutex);
drm_reinit_primary_mode_group(dev);
kfree(intel_connector);
DRM_DEBUG_KMS("\n");
}
static void intel_dp_mst_hotplug(struct drm_dp_mst_topology_mgr *mgr)
{
struct intel_dp *intel_dp = container_of(mgr, struct intel_dp, mst_mgr);
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = intel_dig_port->base.base.dev;
drm_kms_helper_hotplug_event(dev);
}
static struct drm_dp_mst_topology_cbs mst_cbs = {
.add_connector = intel_dp_add_mst_connector,
.destroy_connector = intel_dp_destroy_mst_connector,
.hotplug = intel_dp_mst_hotplug,
};
static struct intel_dp_mst_encoder *
intel_dp_create_fake_mst_encoder(struct intel_digital_port *intel_dig_port, enum pipe pipe)
{
struct intel_dp_mst_encoder *intel_mst;
struct intel_encoder *intel_encoder;
struct drm_device *dev = intel_dig_port->base.base.dev;
intel_mst = kzalloc(sizeof(*intel_mst), GFP_KERNEL);
if (!intel_mst)
return NULL;
intel_mst->pipe = pipe;
intel_encoder = &intel_mst->base;
intel_mst->primary = intel_dig_port;
drm_encoder_init(dev, &intel_encoder->base, &intel_dp_mst_enc_funcs,
DRM_MODE_ENCODER_DPMST);
intel_encoder->type = INTEL_OUTPUT_DP_MST;
intel_encoder->crtc_mask = 0x7;
intel_encoder->cloneable = 0;
intel_encoder->compute_config = intel_dp_mst_compute_config;
intel_encoder->disable = intel_mst_disable_dp;
intel_encoder->post_disable = intel_mst_post_disable_dp;
intel_encoder->pre_enable = intel_mst_pre_enable_dp;
intel_encoder->enable = intel_mst_enable_dp;
intel_encoder->get_hw_state = intel_dp_mst_enc_get_hw_state;
intel_encoder->get_config = intel_dp_mst_enc_get_config;
return intel_mst;
}
static bool
intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
{
int i;
struct intel_dp *intel_dp = &intel_dig_port->dp;
for (i = PIPE_A; i <= PIPE_C; i++)
intel_dp->mst_encoders[i] = intel_dp_create_fake_mst_encoder(intel_dig_port, i);
return true;
}
int
intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
{
struct intel_dp *intel_dp = &intel_dig_port->dp;
struct drm_device *dev = intel_dig_port->base.base.dev;
int ret;
intel_dp->can_mst = true;
intel_dp->mst_mgr.cbs = &mst_cbs;
/* create encoders */
intel_dp_create_fake_mst_encoders(intel_dig_port);
ret = drm_dp_mst_topology_mgr_init(&intel_dp->mst_mgr, dev->dev, &intel_dp->aux, 16, 3, conn_base_id);
if (ret) {
intel_dp->can_mst = false;
return ret;
}
return 0;
}
void
intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port)
{
struct intel_dp *intel_dp = &intel_dig_port->dp;
if (!intel_dp->can_mst)
return;
drm_dp_mst_topology_mgr_destroy(&intel_dp->mst_mgr);
/* encoders will get killed by normal cleanup */
}