0,0 → 1,548 |
/* |
* 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_crtc_helper.h> |
#include <drm/drm_edid.h> |
|
static bool intel_dp_mst_compute_config(struct intel_encoder *encoder, |
struct intel_crtc_config *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_device *dev = encoder->base.dev; |
int bpp; |
int lane_count, slots; |
struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode; |
struct intel_connector *found = NULL, *intel_connector; |
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); |
intel_dp->link_bw = intel_dp_max_link_bw(intel_dp); |
intel_dp->lane_count = lane_count; |
|
pipe_config->pipe_bpp = 24; |
pipe_config->port_clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw); |
|
list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) { |
if (intel_connector->new_encoder == encoder) { |
found = intel_connector; |
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); |
|
list_for_each_entry(intel_connector, &dev->mode_config.connector_list, base.head) { |
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_config *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 = crtc->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->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_mst_port_dp_detect(struct drm_connector *connector) |
{ |
struct intel_connector *intel_connector = to_intel_connector(connector); |
struct intel_dp *intel_dp = intel_connector->mst_port; |
|
return drm_dp_mst_detect_port(&intel_dp->mst_mgr, intel_connector->port); |
} |
|
static enum drm_connector_status |
intel_dp_mst_detect(struct drm_connector *connector, bool force) |
{ |
enum drm_connector_status status; |
status = intel_mst_port_dp_detect(connector); |
return status; |
} |
|
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, |
.destroy = intel_dp_mst_connector_destroy, |
}; |
|
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, 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 = kzalloc(sizeof(*intel_connector), GFP_KERNEL); |
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_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 */ |
} |