/*
* Copyright © 2006 - 2010 Intel Corporation
* Copyright ( c ) 2006 Dave Airlie < airlied @ linux . ie >
*
* 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 .
*
* Authors :
* Eric Anholt < eric @ anholt . net >
* Dave Airlie < airlied @ linux . ie >
* Jesse Barnes < jesse . barnes @ intel . com >
* Chris Wilson < chris @ chris - wilson . co . uk >
*/
#include <linux/kernel.h>
#include <linux/pwm.h>
#include <drm/drm_edid.h>
#include <drm/drm_print.h>
#include "intel_backlight.h"
#include "intel_connector.h"
#include "intel_display_core.h"
#include "intel_display_driver.h"
#include "intel_display_types.h"
#include "intel_drrs.h"
#include "intel_panel.h"
#include "intel_quirks.h"
#include "intel_vrr.h"
bool intel_panel_use_ssc(struct intel_display *display)
{
if (display->params.panel_use_ssc >= 0 )
return display->params.panel_use_ssc != 0 ;
return display->vbt.lvds_use_ssc &&
!intel_has_quirk(display, QUIRK_LVDS_SSC_DISABLE);
}
const struct drm_display_mode *
intel_panel_preferred_fixed_mode(struct intel_connector *connector)
{
return list_first_entry_or_null(&connector->panel.fixed_modes,
struct drm_display_mode, head);
}
static bool is_best_fixed_mode(struct intel_connector *connector,
int vrefresh, int fixed_mode_vrefresh,
const struct drm_display_mode *best_mode)
{
/* we want to always return something */
if (!best_mode)
return true ;
/*
* With VRR always pick a mode with equal / higher than requested
* vrefresh , which we can then reduce to match the requested
* vrefresh by extending the vblank length .
*/
if (intel_vrr_is_in_range(connector, vrefresh) &&
intel_vrr_is_in_range(connector, fixed_mode_vrefresh) &&
fixed_mode_vrefresh < vrefresh)
return false ;
/* pick the fixed_mode that is closest in terms of vrefresh */
return abs(fixed_mode_vrefresh - vrefresh) <
abs(drm_mode_vrefresh(best_mode) - vrefresh);
}
const struct drm_display_mode *
intel_panel_fixed_mode(struct intel_connector *connector,
const struct drm_display_mode *mode)
{
const struct drm_display_mode *fixed_mode, *best_mode = NULL;
int vrefresh = drm_mode_vrefresh(mode);
list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
int fixed_mode_vrefresh = drm_mode_vrefresh(fixed_mode);
if (is_best_fixed_mode(connector, vrefresh,
fixed_mode_vrefresh, best_mode))
best_mode = fixed_mode;
}
return best_mode;
}
static bool is_alt_drrs_mode(const struct drm_display_mode *mode,
const struct drm_display_mode *preferred_mode)
{
return drm_mode_match(mode, preferred_mode,
DRM_MODE_MATCH_TIMINGS |
DRM_MODE_MATCH_FLAGS |
DRM_MODE_MATCH_3D_FLAGS) &&
mode->clock != preferred_mode->clock;
}
static bool is_alt_fixed_mode(const struct drm_display_mode *mode,
const struct drm_display_mode *preferred_mode)
{
u32 sync_flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NHSYNC |
DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC;
return (mode->flags & ~sync_flags) == (preferred_mode->flags & ~sync_flags) &&
mode->hdisplay == preferred_mode->hdisplay &&
mode->vdisplay == preferred_mode->vdisplay;
}
const struct drm_display_mode *
intel_panel_downclock_mode(struct intel_connector *connector,
const struct drm_display_mode *adjusted_mode)
{
const struct drm_display_mode *fixed_mode, *best_mode = NULL;
int min_vrefresh = connector->panel.vbt.seamless_drrs_min_refresh_rate;
int max_vrefresh = drm_mode_vrefresh(adjusted_mode);
/* pick the fixed_mode with the lowest refresh rate */
list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
int vrefresh = drm_mode_vrefresh(fixed_mode);
if (is_alt_drrs_mode(fixed_mode, adjusted_mode) &&
vrefresh >= min_vrefresh && vrefresh < max_vrefresh) {
max_vrefresh = vrefresh;
best_mode = fixed_mode;
}
}
return best_mode;
}
const struct drm_display_mode *
intel_panel_highest_mode(struct intel_connector *connector,
const struct drm_display_mode *adjusted_mode)
{
const struct drm_display_mode *fixed_mode, *best_mode = adjusted_mode;
/* pick the fixed_mode that has the highest clock */
list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
if (fixed_mode->clock > best_mode->clock)
best_mode = fixed_mode;
}
return best_mode;
}
int intel_panel_get_modes(struct intel_connector *connector)
{
const struct drm_display_mode *fixed_mode;
int num_modes = 0 ;
list_for_each_entry(fixed_mode, &connector->panel.fixed_modes, head) {
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->base.dev, fixed_mode);
if (mode) {
drm_mode_probed_add(&connector->base, mode);
num_modes++;
}
}
return num_modes;
}
static bool has_drrs_modes(struct intel_connector *connector)
{
const struct drm_display_mode *mode1;
list_for_each_entry(mode1, &connector->panel.fixed_modes, head) {
const struct drm_display_mode *mode2 = mode1;
list_for_each_entry_continue(mode2, &connector->panel.fixed_modes, head) {
if (is_alt_drrs_mode(mode1, mode2))
return true ;
}
}
return false ;
}
enum drrs_type intel_panel_drrs_type(struct intel_connector *connector)
{
return connector->panel.vbt.drrs_type;
}
int intel_panel_compute_config(struct intel_connector *connector,
struct drm_display_mode *adjusted_mode)
{
const struct drm_display_mode *fixed_mode =
intel_panel_fixed_mode(connector, adjusted_mode);
int vrefresh, fixed_mode_vrefresh;
bool is_vrr;
if (!fixed_mode)
return 0 ;
vrefresh = drm_mode_vrefresh(adjusted_mode);
fixed_mode_vrefresh = drm_mode_vrefresh(fixed_mode);
/*
* Assume that we shouldn ' t muck about with the
* timings if they don ' t land in the VRR range .
*/
is_vrr = intel_vrr_is_in_range(connector, vrefresh) &&
intel_vrr_is_in_range(connector, fixed_mode_vrefresh);
if (!is_vrr) {
/*
* We don ' t want to lie too much to the user about the refresh
* rate they ' re going to get . But we have to allow a bit of latitude
* for Xorg since it likes to automagically cook up modes with slightly
* off refresh rates .
*/
if (abs(vrefresh - fixed_mode_vrefresh) > 1 ) {
drm_dbg_kms(connector->base.dev,
"[CONNECTOR:%d:%s] Requested mode vrefresh (%d Hz) does not match fixed mode vrefresh (%d Hz)\n" ,
connector->base.base.id, connector->base.name,
vrefresh, fixed_mode_vrefresh);
return -EINVAL;
}
}
drm_mode_copy(adjusted_mode, fixed_mode);
if (is_vrr && fixed_mode_vrefresh != vrefresh)
adjusted_mode->vtotal =
DIV_ROUND_CLOSEST(adjusted_mode->clock * 1000 ,
adjusted_mode->htotal * vrefresh);
drm_mode_set_crtcinfo(adjusted_mode, 0 );
return 0 ;
}
static void intel_panel_add_edid_alt_fixed_modes(struct intel_connector *connector)
{
struct intel_display *display = to_intel_display(connector);
const struct drm_display_mode *preferred_mode =
intel_panel_preferred_fixed_mode(connector);
struct drm_display_mode *mode, *next;
list_for_each_entry_safe(mode, next, &connector->base.probed_modes, head) {
if (!is_alt_fixed_mode(mode, preferred_mode))
continue ;
drm_dbg_kms(display->drm,
"[CONNECTOR:%d:%s] using alternate EDID fixed mode: " DRM_MODE_FMT "\n" ,
connector->base.base.id, connector->base.name,
DRM_MODE_ARG(mode));
list_move_tail(&mode->head, &connector->panel.fixed_modes);
}
}
static void intel_panel_add_edid_preferred_mode(struct intel_connector *connector)
{
struct intel_display *display = to_intel_display(connector);
struct drm_display_mode *scan, *fixed_mode = NULL;
if (list_empty(&connector->base.probed_modes))
return ;
/* make sure the preferred mode is first */
list_for_each_entry(scan, &connector->base.probed_modes, head) {
if (scan->type & DRM_MODE_TYPE_PREFERRED) {
fixed_mode = scan;
break ;
}
}
if (!fixed_mode)
fixed_mode = list_first_entry(&connector->base.probed_modes,
typeof(*fixed_mode), head);
drm_dbg_kms(display->drm,
"[CONNECTOR:%d:%s] using %s EDID fixed mode: " DRM_MODE_FMT "\n" ,
connector->base.base.id, connector->base.name,
fixed_mode->type & DRM_MODE_TYPE_PREFERRED ? "preferred" : "first" ,
DRM_MODE_ARG(fixed_mode));
fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;
list_move_tail(&fixed_mode->head, &connector->panel.fixed_modes);
}
static void intel_panel_destroy_probed_modes(struct intel_connector *connector)
{
struct intel_display *display = to_intel_display(connector);
struct drm_display_mode *mode, *next;
list_for_each_entry_safe(mode, next, &connector->base.probed_modes, head) {
drm_dbg_kms(display->drm,
"[CONNECTOR:%d:%s] not using EDID mode: " DRM_MODE_FMT "\n" ,
connector->base.base.id, connector->base.name,
DRM_MODE_ARG(mode));
list_del(&mode->head);
drm_mode_destroy(display->drm, mode);
}
}
void intel_panel_add_edid_fixed_modes(struct intel_connector *connector,
bool use_alt_fixed_modes)
{
intel_panel_add_edid_preferred_mode(connector);
if (intel_panel_preferred_fixed_mode(connector) && use_alt_fixed_modes)
intel_panel_add_edid_alt_fixed_modes(connector);
intel_panel_destroy_probed_modes(connector);
}
static void intel_panel_add_fixed_mode(struct intel_connector *connector,
struct drm_display_mode *fixed_mode,
const char *type)
{
struct intel_display *display = to_intel_display(connector);
struct drm_display_info *info = &connector->base.display_info;
if (!fixed_mode)
return ;
fixed_mode->type |= DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
info->width_mm = fixed_mode->width_mm;
info->height_mm = fixed_mode->height_mm;
drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s] using %s fixed mode: " DRM_MODE_FMT "\n" ,
connector->base.base.id, connector->base.name, type,
DRM_MODE_ARG(fixed_mode));
list_add_tail(&fixed_mode->head, &connector->panel.fixed_modes);
}
void intel_panel_add_vbt_lfp_fixed_mode(struct intel_connector *connector)
{
struct intel_display *display = to_intel_display(connector);
const struct drm_display_mode *mode;
mode = connector->panel.vbt.lfp_vbt_mode;
if (!mode)
return ;
intel_panel_add_fixed_mode(connector,
drm_mode_duplicate(display->drm, mode),
"VBT LFP" );
}
void intel_panel_add_vbt_sdvo_fixed_mode(struct intel_connector *connector)
{
struct intel_display *display = to_intel_display(connector);
const struct drm_display_mode *mode;
mode = connector->panel.vbt.sdvo_lvds_vbt_mode;
if (!mode)
return ;
intel_panel_add_fixed_mode(connector,
drm_mode_duplicate(display->drm, mode),
"VBT SDVO" );
}
void intel_panel_add_encoder_fixed_mode(struct intel_connector *connector,
struct intel_encoder *encoder)
{
intel_panel_add_fixed_mode(connector,
intel_encoder_current_mode(encoder),
"current (BIOS)" );
}
enum drm_connector_status
intel_panel_detect(struct drm_connector *connector, bool force)
{
struct intel_display *display = to_intel_display(connector->dev);
if (!intel_display_device_enabled(display))
return connector_status_disconnected;
if (!intel_display_driver_check_access(display))
return connector->status;
return connector_status_connected;
}
enum drm_mode_status
intel_panel_mode_valid(struct intel_connector *connector,
const struct drm_display_mode *mode)
{
const struct drm_display_mode *fixed_mode =
intel_panel_fixed_mode(connector, mode);
if (!fixed_mode)
return MODE_OK;
if (mode->hdisplay != fixed_mode->hdisplay)
return MODE_PANEL;
if (mode->vdisplay != fixed_mode->vdisplay)
return MODE_PANEL;
if (drm_mode_vrefresh(mode) != drm_mode_vrefresh(fixed_mode))
return MODE_PANEL;
return MODE_OK;
}
void intel_panel_init_alloc(struct intel_connector *connector)
{
struct intel_panel *panel = &connector->panel;
connector->panel.vbt.panel_type = -1 ;
connector->panel.vbt.backlight.controller = -1 ;
INIT_LIST_HEAD(&panel->fixed_modes);
}
int intel_panel_init(struct intel_connector *connector,
const struct drm_edid *fixed_edid)
{
struct intel_panel *panel = &connector->panel;
panel->fixed_edid = fixed_edid;
intel_backlight_init_funcs(panel);
if (!has_drrs_modes(connector))
connector->panel.vbt.drrs_type = DRRS_TYPE_NONE;
drm_dbg_kms(connector->base.dev,
"[CONNECTOR:%d:%s] DRRS type: %s\n" ,
connector->base.base.id, connector->base.name,
intel_drrs_type_str(intel_panel_drrs_type(connector)));
return 0 ;
}
void intel_panel_fini(struct intel_connector *connector)
{
struct intel_panel *panel = &connector->panel;
struct drm_display_mode *fixed_mode, *next;
if (!IS_ERR_OR_NULL(panel->fixed_edid))
drm_edid_free(panel->fixed_edid);
intel_backlight_destroy(panel);
intel_bios_fini_panel(panel);
list_for_each_entry_safe(fixed_mode, next, &panel->fixed_modes, head) {
list_del(&fixed_mode->head);
drm_mode_destroy(connector->base.dev, fixed_mode);
}
}
/*
* If the panel was already enabled at probe , and we took over the state , the
* panel prepared state is out of sync , and the panel followers won ' t be
* notified . We need to call drm_panel_prepare ( ) on enabled panels .
*
* It would be natural to handle this e . g . in the connector - > sync_state hook at
* intel_modeset_readout_hw_state ( ) , but that ' s unfortunately too early . We
* don ' t have drm_connector : : kdev at that time . For now , figure out the state at
* - > late_register , and sync there .
*/
static void intel_panel_sync_state(struct intel_connector *connector)
{
struct intel_display *display = to_intel_display(connector);
struct drm_connector_state *conn_state;
struct intel_crtc *crtc;
int ret;
ret = drm_modeset_lock(&display->drm->mode_config.connection_mutex, NULL);
if (ret)
return ;
conn_state = connector->base.state;
crtc = to_intel_crtc(conn_state->crtc);
if (crtc) {
struct intel_crtc_state *crtc_state;
crtc_state = to_intel_crtc_state(crtc->base.state);
if (crtc_state->hw.active) {
drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s] Panel prepare\n" ,
connector->base.base.id, connector->base.name);
intel_panel_prepare(crtc_state, conn_state);
}
}
drm_modeset_unlock(&display->drm->mode_config.connection_mutex);
}
static const struct drm_panel_funcs dummy_panel_funcs = {
};
int intel_panel_register(struct intel_connector *connector)
{
struct intel_display *display = to_intel_display(connector);
struct intel_panel *panel = &connector->panel;
int ret;
ret = intel_backlight_device_register(connector);
if (ret)
return ret;
if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI ||
connector->base.connector_type == DRM_MODE_CONNECTOR_eDP) {
struct device *dev = connector->base.kdev;
struct drm_panel *base;
/* Sanity check. */
if (drm_WARN_ON(display->drm, !dev))
goto out;
/*
* We need drm_connector : : kdev for allocating the panel , to make
* drm_panel_add_follower ( ) lookups work . The kdev is
* initialized in drm_sysfs_connector_add ( ) , just before the
* connector . late_register ( ) hooks . So we can ' t allocate the
* panel at connector init time , and can ' t allocate struct
* intel_panel with a drm_panel sub - struct . For now , use
* _ _ devm_drm_panel_alloc ( ) directly .
*
* The lookups also depend on drm_connector : : fwnode being set in
* intel_acpi_assign_connector_fwnodes ( ) . However , if that ' s
* missing , it will gracefully lead to - EPROBE_DEFER in
* drm_panel_add_follower ( ) .
*/
base = __devm_drm_panel_alloc(dev, sizeof (*base), 0 ,
&dummy_panel_funcs,
connector->base.connector_type);
if (IS_ERR(base)) {
ret = PTR_ERR(base);
goto err;
}
panel->base = base;
drm_panel_add(panel->base);
drm_dbg_kms(display->drm, "[CONNECTOR:%d:%s] Registered panel device '%s', has fwnode: %s\n" ,
connector->base.base.id, connector->base.name,
dev_name(dev), str_yes_no(dev_fwnode(dev)));
intel_panel_sync_state(connector);
}
out:
return 0 ;
err:
intel_backlight_device_unregister(connector);
return ret;
}
void intel_panel_unregister(struct intel_connector *connector)
{
struct intel_panel *panel = &connector->panel;
if (panel->base)
drm_panel_remove(panel->base);
intel_backlight_device_unregister(connector);
}
/* Notify followers, if any, about power being up. */
void intel_panel_prepare(const struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state)
{
struct intel_connector *connector = to_intel_connector(conn_state->connector);
struct intel_panel *panel = &connector->panel;
drm_panel_prepare(panel->base);
}
/* Notify followers, if any, about power going down. */
void intel_panel_unprepare(const struct drm_connector_state *old_conn_state)
{
struct intel_connector *connector = to_intel_connector(old_conn_state->connector);
struct intel_panel *panel = &connector->panel;
drm_panel_unprepare(panel->base);
}
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