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mutter/src/backends/native/meta-monitor-manager-kms.c
Jonas Ådahl 5111e33948 monitor-manager/kms: Get hotplug events from MetaKms 
This makes it clearer that MetaMonitorManagerKms keeps updated as
MetaKms updates its state.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/743
2019-09-05 08:03:36 +00:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* Copyright (C) 2013 Red Hat Inc.
* Copyright (C) 2018 DisplayLink (UK) Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Author: Giovanni Campagna <gcampagn@redhat.com>
*/
/**
* SECTION:meta-monitor-manager-kms
* @title: MetaMonitorManagerKms
* @short_description: A subclass of #MetaMonitorManager using Linux DRM
*
* #MetaMonitorManagerKms is a subclass of #MetaMonitorManager which
* implements its functionality "natively": it uses the appropriate
* functions of the Linux DRM kernel module and using a udev client.
*
* See also #MetaMonitorManagerXrandr for an implementation using XRandR.
*/
#include "config.h"
#include "backends/native/meta-monitor-manager-kms.h"
#include <drm.h>
#include <errno.h>
#include <gudev/gudev.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include "backends/meta-backend-private.h"
#include "backends/meta-crtc.h"
#include "backends/meta-monitor-config-manager.h"
#include "backends/meta-output.h"
#include "backends/native/meta-backend-native.h"
#include "backends/native/meta-crtc-kms.h"
#include "backends/native/meta-gpu-kms.h"
#include "backends/native/meta-kms-update.h"
#include "backends/native/meta-kms.h"
#include "backends/native/meta-launcher.h"
#include "backends/native/meta-output-kms.h"
#include "backends/native/meta-renderer-native.h"
#include "clutter/clutter.h"
#include "meta/main.h"
#include "meta/meta-x11-errors.h"
typedef struct
{
GSource source;
gpointer fd_tag;
MetaMonitorManagerKms *manager_kms;
} MetaKmsSource;
struct _MetaMonitorManagerKms
{
MetaMonitorManager parent_instance;
gulong kms_resources_changed_handler_id;
};
struct _MetaMonitorManagerKmsClass
{
MetaMonitorManagerClass parent_class;
};
static void
initable_iface_init (GInitableIface *initable_iface);
G_DEFINE_TYPE_WITH_CODE (MetaMonitorManagerKms, meta_monitor_manager_kms,
META_TYPE_MONITOR_MANAGER,
G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
initable_iface_init))
static GBytes *
meta_monitor_manager_kms_read_edid (MetaMonitorManager *manager,
MetaOutput *output)
{
return meta_output_kms_read_edid (output);
}
static void
meta_monitor_manager_kms_read_current_state (MetaMonitorManager *manager)
{
MetaMonitorManagerClass *parent_class =
META_MONITOR_MANAGER_CLASS (meta_monitor_manager_kms_parent_class);
MetaPowerSave power_save_mode;
power_save_mode = meta_monitor_manager_get_power_save_mode (manager);
if (power_save_mode != META_POWER_SAVE_ON)
meta_monitor_manager_power_save_mode_changed (manager,
META_POWER_SAVE_ON);
parent_class->read_current_state (manager);
}
static void
meta_monitor_manager_kms_set_power_save_mode (MetaMonitorManager *manager,
MetaPowerSave mode)
{
MetaBackend *backend = meta_monitor_manager_get_backend (manager);
MetaBackendNative *backend_native = META_BACKEND_NATIVE (backend);
MetaKms *kms = meta_backend_native_get_kms (backend_native);
MetaKmsUpdate *kms_update;
g_autoptr (GError) error = NULL;
uint64_t state;
GList *l;
switch (mode) {
case META_POWER_SAVE_ON:
state = DRM_MODE_DPMS_ON;
break;
case META_POWER_SAVE_STANDBY:
state = DRM_MODE_DPMS_STANDBY;
break;
case META_POWER_SAVE_SUSPEND:
state = DRM_MODE_DPMS_SUSPEND;
break;
case META_POWER_SAVE_OFF:
state = DRM_MODE_DPMS_OFF;
break;
default:
return;
}
kms_update = meta_kms_ensure_pending_update (kms);
for (l = meta_backend_get_gpus (backend); l; l = l->next)
{
MetaGpuKms *gpu_kms = l->data;
meta_gpu_kms_set_power_save_mode (gpu_kms, state, kms_update);
}
if (!meta_kms_post_pending_update_sync (kms, &error))
g_warning ("Failed to DPMS: %s", error->message);
}
static void
meta_monitor_manager_kms_ensure_initial_config (MetaMonitorManager *manager)
{
MetaMonitorsConfig *config;
config = meta_monitor_manager_ensure_configured (manager);
meta_monitor_manager_update_logical_state (manager, config);
}
static void
apply_crtc_assignments (MetaMonitorManager *manager,
MetaCrtcInfo **crtcs,
unsigned int n_crtcs,
MetaOutputInfo **outputs,
unsigned int n_outputs)
{
MetaBackend *backend = meta_monitor_manager_get_backend (manager);
unsigned i;
GList *gpus;
GList *l;
for (i = 0; i < n_crtcs; i++)
{
MetaCrtcInfo *crtc_info = crtcs[i];
MetaCrtc *crtc = crtc_info->crtc;
crtc->is_dirty = TRUE;
if (crtc_info->mode == NULL)
{
crtc->rect.x = 0;
crtc->rect.y = 0;
crtc->rect.width = 0;
crtc->rect.height = 0;
crtc->current_mode = NULL;
}
else
{
MetaCrtcMode *mode;
unsigned int j;
int width, height;
mode = crtc_info->mode;
if (meta_monitor_transform_is_rotated (crtc_info->transform))
{
width = mode->height;
height = mode->width;
}
else
{
width = mode->width;
height = mode->height;
}
crtc->rect.x = crtc_info->x;
crtc->rect.y = crtc_info->y;
crtc->rect.width = width;
crtc->rect.height = height;
crtc->current_mode = mode;
crtc->transform = crtc_info->transform;
for (j = 0; j < crtc_info->outputs->len; j++)
{
MetaOutput *output = g_ptr_array_index (crtc_info->outputs, j);
output->is_dirty = TRUE;
meta_output_assign_crtc (output, crtc);
}
}
}
/* Disable CRTCs not mentioned in the list (they have is_dirty == FALSE,
because they weren't seen in the first loop) */
gpus = meta_backend_get_gpus (backend);
for (l = gpus; l; l = l->next)
{
MetaGpu *gpu = l->data;
GList *k;
for (k = meta_gpu_get_crtcs (gpu); k; k = k->next)
{
MetaCrtc *crtc = k->data;
crtc->logical_monitor = NULL;
if (crtc->is_dirty)
{
crtc->is_dirty = FALSE;
continue;
}
crtc->rect.x = 0;
crtc->rect.y = 0;
crtc->rect.width = 0;
crtc->rect.height = 0;
crtc->current_mode = NULL;
}
}
for (i = 0; i < n_outputs; i++)
{
MetaOutputInfo *output_info = outputs[i];
MetaOutput *output = output_info->output;
output->is_primary = output_info->is_primary;
output->is_presentation = output_info->is_presentation;
output->is_underscanning = output_info->is_underscanning;
}
/* Disable outputs not mentioned in the list */
for (l = gpus; l; l = l->next)
{
MetaGpu *gpu = l->data;
GList *k;
for (k = meta_gpu_get_outputs (gpu); k; k = k->next)
{
MetaOutput *output = k->data;
if (output->is_dirty)
{
output->is_dirty = FALSE;
continue;
}
meta_output_unassign_crtc (output);
output->is_primary = FALSE;
}
}
}
static void
update_screen_size (MetaMonitorManager *manager,
MetaMonitorsConfig *config)
{
GList *l;
int screen_width = 0;
int screen_height = 0;
for (l = config->logical_monitor_configs; l; l = l->next)
{
MetaLogicalMonitorConfig *logical_monitor_config = l->data;
int right_edge;
int bottom_edge;
right_edge = (logical_monitor_config->layout.width +
logical_monitor_config->layout.x);
if (right_edge > screen_width)
screen_width = right_edge;
bottom_edge = (logical_monitor_config->layout.height +
logical_monitor_config->layout.y);
if (bottom_edge > screen_height)
screen_height = bottom_edge;
}
manager->screen_width = screen_width;
manager->screen_height = screen_height;
}
static gboolean
meta_monitor_manager_kms_apply_monitors_config (MetaMonitorManager *manager,
MetaMonitorsConfig *config,
MetaMonitorsConfigMethod method,
GError **error)
{
GPtrArray *crtc_infos;
GPtrArray *output_infos;
if (!config)
{
manager->screen_width = META_MONITOR_MANAGER_MIN_SCREEN_WIDTH;
manager->screen_height = META_MONITOR_MANAGER_MIN_SCREEN_HEIGHT;
meta_monitor_manager_rebuild (manager, NULL);
return TRUE;
}
if (!meta_monitor_config_manager_assign (manager, config,
&crtc_infos, &output_infos,
error))
return FALSE;
if (method == META_MONITORS_CONFIG_METHOD_VERIFY)
{
g_ptr_array_free (crtc_infos, TRUE);
g_ptr_array_free (output_infos, TRUE);
return TRUE;
}
apply_crtc_assignments (manager,
(MetaCrtcInfo **) crtc_infos->pdata,
crtc_infos->len,
(MetaOutputInfo **) output_infos->pdata,
output_infos->len);
g_ptr_array_free (crtc_infos, TRUE);
g_ptr_array_free (output_infos, TRUE);
update_screen_size (manager, config);
meta_monitor_manager_rebuild (manager, config);
return TRUE;
}
static void
meta_monitor_manager_kms_get_crtc_gamma (MetaMonitorManager *manager,
MetaCrtc *crtc,
gsize *size,
unsigned short **red,
unsigned short **green,
unsigned short **blue)
{
MetaKmsCrtc *kms_crtc;
const MetaKmsCrtcState *crtc_state;
kms_crtc = meta_crtc_kms_get_kms_crtc (crtc);
crtc_state = meta_kms_crtc_get_current_state (kms_crtc);
*size = crtc_state->gamma.size;
*red = g_memdup (crtc_state->gamma.red, *size * sizeof **red);
*green = g_memdup (crtc_state->gamma.green, *size * sizeof **green);
*blue = g_memdup (crtc_state->gamma.blue, *size * sizeof **blue);
}
static char *
generate_gamma_ramp_string (size_t size,
unsigned short *red,
unsigned short *green,
unsigned short *blue)
{
GString *string;
int color;
string = g_string_new ("[");
for (color = 0; color < 3; color++)
{
unsigned short **color_ptr;
char color_char;
size_t i;
switch (color)
{
case 0:
color_ptr = &red;
color_char = 'r';
break;
case 1:
color_ptr = &green;
color_char = 'g';
break;
case 2:
color_ptr = &blue;
color_char = 'b';
break;
}
g_string_append_printf (string, " %c: ", color_char);
for (i = 0; i < MIN (4, size); i++)
{
int j;
if (size > 4)
{
if (i == 2)
g_string_append (string, ",...");
if (i >= 2)
j = i + (size - 4);
else
j = i;
}
else
{
j = i;
}
g_string_append_printf (string, "%s%hu",
j == 0 ? "" : ",",
(*color_ptr)[i]);
}
}
g_string_append (string, " ]");
return g_string_free (string, FALSE);
}
static void
meta_monitor_manager_kms_set_crtc_gamma (MetaMonitorManager *manager,
MetaCrtc *crtc,
gsize size,
unsigned short *red,
unsigned short *green,
unsigned short *blue)
{
MetaBackend *backend = meta_monitor_manager_get_backend (manager);
MetaBackendNative *backend_native = META_BACKEND_NATIVE (backend);
MetaKms *kms = meta_backend_native_get_kms (backend_native);
MetaKmsCrtc *kms_crtc;
g_autofree char *gamma_ramp_string = NULL;
MetaKmsUpdate *kms_update;
g_autoptr (GError) error = NULL;
gamma_ramp_string = generate_gamma_ramp_string (size, red, green, blue);
g_debug ("Setting CRTC (%ld) gamma to %s", crtc->crtc_id, gamma_ramp_string);
kms_update = meta_kms_ensure_pending_update (kms);
kms_crtc = meta_crtc_kms_get_kms_crtc (crtc);
meta_kms_crtc_set_gamma (kms_crtc, kms_update,
size, red, green, blue);
if (!meta_kms_post_pending_update_sync (kms, &error))
g_warning ("Failed to CRTC gamma: %s", error->message);
}
static void
handle_hotplug_event (MetaMonitorManager *manager)
{
meta_monitor_manager_read_current_state (manager);
meta_monitor_manager_on_hotplug (manager);
}
static void
on_kms_resources_changed (MetaKms *kms,
MetaMonitorManager *manager)
{
handle_hotplug_event (manager);
}
static void
meta_monitor_manager_kms_connect_hotplug_handler (MetaMonitorManagerKms *manager_kms)
{
MetaMonitorManager *manager = META_MONITOR_MANAGER (manager_kms);
MetaBackend *backend = meta_monitor_manager_get_backend (manager);
MetaBackendNative *backend_native = META_BACKEND_NATIVE (backend);
MetaKms *kms = meta_backend_native_get_kms (backend_native);
manager_kms->kms_resources_changed_handler_id =
g_signal_connect (kms, "resources-changed",
G_CALLBACK (on_kms_resources_changed), manager);
}
static void
meta_monitor_manager_kms_disconnect_hotplug_handler (MetaMonitorManagerKms *manager_kms)
{
MetaMonitorManager *manager = META_MONITOR_MANAGER (manager_kms);
MetaBackend *backend = meta_monitor_manager_get_backend (manager);
MetaBackendNative *backend_native = META_BACKEND_NATIVE (backend);
MetaKms *kms = meta_backend_native_get_kms (backend_native);
g_clear_signal_handler (&manager_kms->kms_resources_changed_handler_id, kms);
}
void
meta_monitor_manager_kms_pause (MetaMonitorManagerKms *manager_kms)
{
meta_monitor_manager_kms_disconnect_hotplug_handler (manager_kms);
}
void
meta_monitor_manager_kms_resume (MetaMonitorManagerKms *manager_kms)
{
meta_monitor_manager_kms_connect_hotplug_handler (manager_kms);
handle_hotplug_event (META_MONITOR_MANAGER (manager_kms));
}
static gboolean
meta_monitor_manager_kms_is_transform_handled (MetaMonitorManager *manager,
MetaCrtc *crtc,
MetaMonitorTransform transform)
{
return meta_crtc_kms_is_transform_handled (crtc, transform);
}
static float
meta_monitor_manager_kms_calculate_monitor_mode_scale (MetaMonitorManager *manager,
MetaMonitor *monitor,
MetaMonitorMode *monitor_mode)
{
return meta_monitor_calculate_mode_scale (monitor, monitor_mode);
}
static float *
meta_monitor_manager_kms_calculate_supported_scales (MetaMonitorManager *manager,
MetaLogicalMonitorLayoutMode layout_mode,
MetaMonitor *monitor,
MetaMonitorMode *monitor_mode,
int *n_supported_scales)
{
MetaMonitorScalesConstraint constraints =
META_MONITOR_SCALES_CONSTRAINT_NONE;
switch (layout_mode)
{
case META_LOGICAL_MONITOR_LAYOUT_MODE_LOGICAL:
break;
case META_LOGICAL_MONITOR_LAYOUT_MODE_PHYSICAL:
constraints |= META_MONITOR_SCALES_CONSTRAINT_NO_FRAC;
break;
}
return meta_monitor_calculate_supported_scales (monitor, monitor_mode,
constraints,
n_supported_scales);
}
static MetaMonitorManagerCapability
meta_monitor_manager_kms_get_capabilities (MetaMonitorManager *manager)
{
MetaBackend *backend = meta_monitor_manager_get_backend (manager);
MetaSettings *settings = meta_backend_get_settings (backend);
MetaRenderer *renderer = meta_backend_get_renderer (backend);
MetaRendererNative *renderer_native = META_RENDERER_NATIVE (renderer);
MetaMonitorManagerCapability capabilities =
META_MONITOR_MANAGER_CAPABILITY_NONE;
if (meta_settings_is_experimental_feature_enabled (
settings,
META_EXPERIMENTAL_FEATURE_SCALE_MONITOR_FRAMEBUFFER))
capabilities |= META_MONITOR_MANAGER_CAPABILITY_LAYOUT_MODE;
if (meta_renderer_native_supports_mirroring (renderer_native))
capabilities |= META_MONITOR_MANAGER_CAPABILITY_MIRRORING;
return capabilities;
}
static gboolean
meta_monitor_manager_kms_get_max_screen_size (MetaMonitorManager *manager,
int *max_width,
int *max_height)
{
return FALSE;
}
static MetaLogicalMonitorLayoutMode
meta_monitor_manager_kms_get_default_layout_mode (MetaMonitorManager *manager)
{
MetaBackend *backend = meta_monitor_manager_get_backend (manager);
MetaSettings *settings = meta_backend_get_settings (backend);
if (meta_settings_is_experimental_feature_enabled (
settings,
META_EXPERIMENTAL_FEATURE_SCALE_MONITOR_FRAMEBUFFER))
return META_LOGICAL_MONITOR_LAYOUT_MODE_LOGICAL;
else
return META_LOGICAL_MONITOR_LAYOUT_MODE_PHYSICAL;
}
static gboolean
meta_monitor_manager_kms_initable_init (GInitable *initable,
GCancellable *cancellable,
GError **error)
{
MetaMonitorManagerKms *manager_kms = META_MONITOR_MANAGER_KMS (initable);
MetaMonitorManager *manager = META_MONITOR_MANAGER (manager_kms);
MetaBackend *backend = meta_monitor_manager_get_backend (manager);
gboolean can_have_outputs;
GList *l;
meta_monitor_manager_kms_connect_hotplug_handler (manager_kms);
can_have_outputs = FALSE;
for (l = meta_backend_get_gpus (backend); l; l = l->next)
{
MetaGpuKms *gpu_kms = l->data;
if (meta_gpu_kms_can_have_outputs (gpu_kms))
{
can_have_outputs = TRUE;
break;
}
}
if (!can_have_outputs)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_FOUND,
"No GPUs with outputs found");
return FALSE;
}
return TRUE;
}
static void
initable_iface_init (GInitableIface *initable_iface)
{
initable_iface->init = meta_monitor_manager_kms_initable_init;
}
static void
meta_monitor_manager_kms_init (MetaMonitorManagerKms *manager_kms)
{
}
static void
meta_monitor_manager_kms_class_init (MetaMonitorManagerKmsClass *klass)
{
MetaMonitorManagerClass *manager_class = META_MONITOR_MANAGER_CLASS (klass);
manager_class->read_edid = meta_monitor_manager_kms_read_edid;
manager_class->read_current_state = meta_monitor_manager_kms_read_current_state;
manager_class->ensure_initial_config = meta_monitor_manager_kms_ensure_initial_config;
manager_class->apply_monitors_config = meta_monitor_manager_kms_apply_monitors_config;
manager_class->set_power_save_mode = meta_monitor_manager_kms_set_power_save_mode;
manager_class->get_crtc_gamma = meta_monitor_manager_kms_get_crtc_gamma;
manager_class->set_crtc_gamma = meta_monitor_manager_kms_set_crtc_gamma;
manager_class->is_transform_handled = meta_monitor_manager_kms_is_transform_handled;
manager_class->calculate_monitor_mode_scale = meta_monitor_manager_kms_calculate_monitor_mode_scale;
manager_class->calculate_supported_scales = meta_monitor_manager_kms_calculate_supported_scales;
manager_class->get_capabilities = meta_monitor_manager_kms_get_capabilities;
manager_class->get_max_screen_size = meta_monitor_manager_kms_get_max_screen_size;
manager_class->get_default_layout_mode = meta_monitor_manager_kms_get_default_layout_mode;
}
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