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xf86drmMode.c
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xf86drmMode.c
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/*
* \file xf86drmMode.c
* Header for DRM modesetting interface.
*
* \author Jakob Bornecrantz <wallbraker@gmail.com>
*
* \par Acknowledgements:
* Feb 2007, Dave Airlie <airlied@linux.ie>
*/
/*
* Copyright (c) 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* Copyright (c) 2007-2008 Dave Airlie <airlied@linux.ie>
* Copyright (c) 2007-2008 Jakob Bornecrantz <wallbraker@gmail.com>
*
* 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 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 <assert.h>
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#if HAVE_SYS_SYSCTL_H
#ifdef __FreeBSD__
#include <sys/types.h>
#endif
#include <sys/sysctl.h>
#endif
#include <stdio.h>
#include <stdbool.h>
#include "libdrm_macros.h"
#include "xf86drmMode.h"
#include "xf86drm.h"
#include <drm.h>
#include <drm_fourcc.h>
#include <string.h>
#include <dirent.h>
#include <unistd.h>
#include <errno.h>
#define memclear(s) memset(&s, 0, sizeof(s))
#define U642VOID(x) ((void *)(unsigned long)(x))
#define VOID2U64(x) ((uint64_t)(unsigned long)(x))
static inline int DRM_IOCTL(int fd, unsigned long cmd, void *arg)
{
int ret = drmIoctl(fd, cmd, arg);
return ret < 0 ? -errno : ret;
}
/*
* Util functions
*/
static void* drmAllocCpy(char *array, int count, int entry_size)
{
char *r;
int i;
if (!count || !array || !entry_size)
return 0;
if (!(r = drmMalloc(count*entry_size)))
return 0;
for (i = 0; i < count; i++)
memcpy(r+(entry_size*i), array+(entry_size*i), entry_size);
return r;
}
/*
* A couple of free functions.
*/
drm_public void drmModeFreeModeInfo(drmModeModeInfoPtr ptr)
{
if (!ptr)
return;
drmFree(ptr);
}
drm_public void drmModeFreeResources(drmModeResPtr ptr)
{
if (!ptr)
return;
drmFree(ptr->fbs);
drmFree(ptr->crtcs);
drmFree(ptr->connectors);
drmFree(ptr->encoders);
drmFree(ptr);
}
drm_public void drmModeFreeFB(drmModeFBPtr ptr)
{
if (!ptr)
return;
/* we might add more frees later. */
drmFree(ptr);
}
drm_public void drmModeFreeCrtc(drmModeCrtcPtr ptr)
{
if (!ptr)
return;
drmFree(ptr);
}
drm_public void drmModeFreeConnector(drmModeConnectorPtr ptr)
{
if (!ptr)
return;
drmFree(ptr->encoders);
drmFree(ptr->prop_values);
drmFree(ptr->props);
drmFree(ptr->modes);
drmFree(ptr);
}
drm_public void drmModeFreeEncoder(drmModeEncoderPtr ptr)
{
drmFree(ptr);
}
/*
* ModeSetting functions.
*/
drm_public int drmIsKMS(int fd)
{
struct drm_mode_card_res res = {0};
if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res) != 0)
return 0;
return res.count_crtcs > 0 && res.count_connectors > 0 && res.count_encoders > 0;
}
drm_public drmModeResPtr drmModeGetResources(int fd)
{
struct drm_mode_card_res res, counts;
drmModeResPtr r = 0;
retry:
memclear(res);
if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
return 0;
counts = res;
if (res.count_fbs) {
res.fb_id_ptr = VOID2U64(drmMalloc(res.count_fbs*sizeof(uint32_t)));
if (!res.fb_id_ptr)
goto err_allocs;
}
if (res.count_crtcs) {
res.crtc_id_ptr = VOID2U64(drmMalloc(res.count_crtcs*sizeof(uint32_t)));
if (!res.crtc_id_ptr)
goto err_allocs;
}
if (res.count_connectors) {
res.connector_id_ptr = VOID2U64(drmMalloc(res.count_connectors*sizeof(uint32_t)));
if (!res.connector_id_ptr)
goto err_allocs;
}
if (res.count_encoders) {
res.encoder_id_ptr = VOID2U64(drmMalloc(res.count_encoders*sizeof(uint32_t)));
if (!res.encoder_id_ptr)
goto err_allocs;
}
if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res))
goto err_allocs;
/* The number of available connectors and etc may have changed with a
* hotplug event in between the ioctls, in which case the field is
* silently ignored by the kernel.
*/
if (counts.count_fbs < res.count_fbs ||
counts.count_crtcs < res.count_crtcs ||
counts.count_connectors < res.count_connectors ||
counts.count_encoders < res.count_encoders)
{
drmFree(U642VOID(res.fb_id_ptr));
drmFree(U642VOID(res.crtc_id_ptr));
drmFree(U642VOID(res.connector_id_ptr));
drmFree(U642VOID(res.encoder_id_ptr));
goto retry;
}
/*
* return
*/
if (!(r = drmMalloc(sizeof(*r))))
goto err_allocs;
r->min_width = res.min_width;
r->max_width = res.max_width;
r->min_height = res.min_height;
r->max_height = res.max_height;
r->count_fbs = res.count_fbs;
r->count_crtcs = res.count_crtcs;
r->count_connectors = res.count_connectors;
r->count_encoders = res.count_encoders;
r->fbs = drmAllocCpy(U642VOID(res.fb_id_ptr), res.count_fbs, sizeof(uint32_t));
r->crtcs = drmAllocCpy(U642VOID(res.crtc_id_ptr), res.count_crtcs, sizeof(uint32_t));
r->connectors = drmAllocCpy(U642VOID(res.connector_id_ptr), res.count_connectors, sizeof(uint32_t));
r->encoders = drmAllocCpy(U642VOID(res.encoder_id_ptr), res.count_encoders, sizeof(uint32_t));
if ((res.count_fbs && !r->fbs) ||
(res.count_crtcs && !r->crtcs) ||
(res.count_connectors && !r->connectors) ||
(res.count_encoders && !r->encoders))
{
drmFree(r->fbs);
drmFree(r->crtcs);
drmFree(r->connectors);
drmFree(r->encoders);
drmFree(r);
r = 0;
}
err_allocs:
drmFree(U642VOID(res.fb_id_ptr));
drmFree(U642VOID(res.crtc_id_ptr));
drmFree(U642VOID(res.connector_id_ptr));
drmFree(U642VOID(res.encoder_id_ptr));
return r;
}
drm_public int drmModeAddFB(int fd, uint32_t width, uint32_t height, uint8_t depth,
uint8_t bpp, uint32_t pitch, uint32_t bo_handle,
uint32_t *buf_id)
{
struct drm_mode_fb_cmd f;
int ret;
memclear(f);
f.width = width;
f.height = height;
f.pitch = pitch;
f.bpp = bpp;
f.depth = depth;
f.handle = bo_handle;
if ((ret = DRM_IOCTL(fd, DRM_IOCTL_MODE_ADDFB, &f)))
return ret;
*buf_id = f.fb_id;
return 0;
}
drm_public int drmModeAddFB2WithModifiers(int fd, uint32_t width,
uint32_t height, uint32_t pixel_format, const uint32_t bo_handles[4],
const uint32_t pitches[4], const uint32_t offsets[4],
const uint64_t modifier[4], uint32_t *buf_id, uint32_t flags)
{
struct drm_mode_fb_cmd2 f;
int ret;
memclear(f);
f.width = width;
f.height = height;
f.pixel_format = pixel_format;
f.flags = flags;
memcpy(f.handles, bo_handles, 4 * sizeof(bo_handles[0]));
memcpy(f.pitches, pitches, 4 * sizeof(pitches[0]));
memcpy(f.offsets, offsets, 4 * sizeof(offsets[0]));
if (modifier)
memcpy(f.modifier, modifier, 4 * sizeof(modifier[0]));
if ((ret = DRM_IOCTL(fd, DRM_IOCTL_MODE_ADDFB2, &f)))
return ret;
*buf_id = f.fb_id;
return 0;
}
drm_public int drmModeAddFB2(int fd, uint32_t width, uint32_t height,
uint32_t pixel_format, const uint32_t bo_handles[4],
const uint32_t pitches[4], const uint32_t offsets[4],
uint32_t *buf_id, uint32_t flags)
{
return drmModeAddFB2WithModifiers(fd, width, height,
pixel_format, bo_handles,
pitches, offsets, NULL,
buf_id, flags);
}
drm_public int drmModeRmFB(int fd, uint32_t bufferId)
{
return DRM_IOCTL(fd, DRM_IOCTL_MODE_RMFB, &bufferId);
}
drm_public int drmModeCloseFB(int fd, uint32_t buffer_id)
{
struct drm_mode_closefb closefb;
memclear(closefb);
closefb.fb_id = buffer_id;
return DRM_IOCTL(fd, DRM_IOCTL_MODE_CLOSEFB, &closefb);
}
drm_public drmModeFBPtr drmModeGetFB(int fd, uint32_t buf)
{
struct drm_mode_fb_cmd info;
drmModeFBPtr r;
memclear(info);
info.fb_id = buf;
if (drmIoctl(fd, DRM_IOCTL_MODE_GETFB, &info))
return NULL;
if (!(r = drmMalloc(sizeof(*r))))
return NULL;
r->fb_id = info.fb_id;
r->width = info.width;
r->height = info.height;
r->pitch = info.pitch;
r->bpp = info.bpp;
r->handle = info.handle;
r->depth = info.depth;
return r;
}
drm_public int drmModeDirtyFB(int fd, uint32_t bufferId,
drmModeClipPtr clips, uint32_t num_clips)
{
struct drm_mode_fb_dirty_cmd dirty;
memclear(dirty);
dirty.fb_id = bufferId;
dirty.clips_ptr = VOID2U64(clips);
dirty.num_clips = num_clips;
return DRM_IOCTL(fd, DRM_IOCTL_MODE_DIRTYFB, &dirty);
}
/*
* Crtc functions
*/
drm_public drmModeCrtcPtr drmModeGetCrtc(int fd, uint32_t crtcId)
{
struct drm_mode_crtc crtc;
drmModeCrtcPtr r;
memclear(crtc);
crtc.crtc_id = crtcId;
if (drmIoctl(fd, DRM_IOCTL_MODE_GETCRTC, &crtc))
return 0;
/*
* return
*/
if (!(r = drmMalloc(sizeof(*r))))
return 0;
r->crtc_id = crtc.crtc_id;
r->x = crtc.x;
r->y = crtc.y;
r->mode_valid = crtc.mode_valid;
if (r->mode_valid) {
memcpy(&r->mode, &crtc.mode, sizeof(struct drm_mode_modeinfo));
r->width = crtc.mode.hdisplay;
r->height = crtc.mode.vdisplay;
}
r->buffer_id = crtc.fb_id;
r->gamma_size = crtc.gamma_size;
return r;
}
drm_public int drmModeSetCrtc(int fd, uint32_t crtcId, uint32_t bufferId,
uint32_t x, uint32_t y, uint32_t *connectors, int count,
drmModeModeInfoPtr mode)
{
struct drm_mode_crtc crtc;
memclear(crtc);
crtc.x = x;
crtc.y = y;
crtc.crtc_id = crtcId;
crtc.fb_id = bufferId;
crtc.set_connectors_ptr = VOID2U64(connectors);
crtc.count_connectors = count;
if (mode) {
memcpy(&crtc.mode, mode, sizeof(struct drm_mode_modeinfo));
crtc.mode_valid = 1;
}
return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETCRTC, &crtc);
}
/*
* Cursor manipulation
*/
drm_public int drmModeSetCursor(int fd, uint32_t crtcId, uint32_t bo_handle,
uint32_t width, uint32_t height)
{
struct drm_mode_cursor arg;
memclear(arg);
arg.flags = DRM_MODE_CURSOR_BO;
arg.crtc_id = crtcId;
arg.width = width;
arg.height = height;
arg.handle = bo_handle;
return DRM_IOCTL(fd, DRM_IOCTL_MODE_CURSOR, &arg);
}
drm_public int drmModeSetCursor2(int fd, uint32_t crtcId, uint32_t bo_handle,
uint32_t width, uint32_t height, int32_t hot_x,
int32_t hot_y)
{
struct drm_mode_cursor2 arg;
memclear(arg);
arg.flags = DRM_MODE_CURSOR_BO;
arg.crtc_id = crtcId;
arg.width = width;
arg.height = height;
arg.handle = bo_handle;
arg.hot_x = hot_x;
arg.hot_y = hot_y;
return DRM_IOCTL(fd, DRM_IOCTL_MODE_CURSOR2, &arg);
}
drm_public int drmModeMoveCursor(int fd, uint32_t crtcId, int x, int y)
{
struct drm_mode_cursor arg;
memclear(arg);
arg.flags = DRM_MODE_CURSOR_MOVE;
arg.crtc_id = crtcId;
arg.x = x;
arg.y = y;
return DRM_IOCTL(fd, DRM_IOCTL_MODE_CURSOR, &arg);
}
/*
* Encoder get
*/
drm_public drmModeEncoderPtr drmModeGetEncoder(int fd, uint32_t encoder_id)
{
struct drm_mode_get_encoder enc;
drmModeEncoderPtr r = NULL;
memclear(enc);
enc.encoder_id = encoder_id;
if (drmIoctl(fd, DRM_IOCTL_MODE_GETENCODER, &enc))
return 0;
if (!(r = drmMalloc(sizeof(*r))))
return 0;
r->encoder_id = enc.encoder_id;
r->crtc_id = enc.crtc_id;
r->encoder_type = enc.encoder_type;
r->possible_crtcs = enc.possible_crtcs;
r->possible_clones = enc.possible_clones;
return r;
}
/*
* Connector manipulation
*/
static drmModeConnectorPtr
_drmModeGetConnector(int fd, uint32_t connector_id, int probe)
{
struct drm_mode_get_connector conn, counts;
drmModeConnectorPtr r = NULL;
struct drm_mode_modeinfo stack_mode;
memclear(conn);
conn.connector_id = connector_id;
if (!probe) {
conn.count_modes = 1;
conn.modes_ptr = VOID2U64(&stack_mode);
}
if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
return 0;
retry:
counts = conn;
if (conn.count_props) {
conn.props_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint32_t)));
if (!conn.props_ptr)
goto err_allocs;
conn.prop_values_ptr = VOID2U64(drmMalloc(conn.count_props*sizeof(uint64_t)));
if (!conn.prop_values_ptr)
goto err_allocs;
}
if (conn.count_modes) {
conn.modes_ptr = VOID2U64(drmMalloc(conn.count_modes*sizeof(struct drm_mode_modeinfo)));
if (!conn.modes_ptr)
goto err_allocs;
} else {
conn.count_modes = 1;
conn.modes_ptr = VOID2U64(&stack_mode);
}
if (conn.count_encoders) {
conn.encoders_ptr = VOID2U64(drmMalloc(conn.count_encoders*sizeof(uint32_t)));
if (!conn.encoders_ptr)
goto err_allocs;
}
if (drmIoctl(fd, DRM_IOCTL_MODE_GETCONNECTOR, &conn))
goto err_allocs;
/* The number of available connectors and etc may have changed with a
* hotplug event in between the ioctls, in which case the field is
* silently ignored by the kernel.
*/
if (counts.count_props < conn.count_props ||
counts.count_modes < conn.count_modes ||
counts.count_encoders < conn.count_encoders) {
drmFree(U642VOID(conn.props_ptr));
drmFree(U642VOID(conn.prop_values_ptr));
if (U642VOID(conn.modes_ptr) != &stack_mode)
drmFree(U642VOID(conn.modes_ptr));
drmFree(U642VOID(conn.encoders_ptr));
goto retry;
}
if(!(r = drmMalloc(sizeof(*r)))) {
goto err_allocs;
}
r->connector_id = conn.connector_id;
r->encoder_id = conn.encoder_id;
r->connection = conn.connection;
r->mmWidth = conn.mm_width;
r->mmHeight = conn.mm_height;
/* convert subpixel from kernel to userspace */
r->subpixel = conn.subpixel + 1;
r->count_modes = conn.count_modes;
r->count_props = conn.count_props;
r->props = drmAllocCpy(U642VOID(conn.props_ptr), conn.count_props, sizeof(uint32_t));
r->prop_values = drmAllocCpy(U642VOID(conn.prop_values_ptr), conn.count_props, sizeof(uint64_t));
r->modes = drmAllocCpy(U642VOID(conn.modes_ptr), conn.count_modes, sizeof(struct drm_mode_modeinfo));
r->count_encoders = conn.count_encoders;
r->encoders = drmAllocCpy(U642VOID(conn.encoders_ptr), conn.count_encoders, sizeof(uint32_t));
r->connector_type = conn.connector_type;
r->connector_type_id = conn.connector_type_id;
if ((r->count_props && !r->props) ||
(r->count_props && !r->prop_values) ||
(r->count_modes && !r->modes) ||
(r->count_encoders && !r->encoders)) {
drmFree(r->props);
drmFree(r->prop_values);
drmFree(r->modes);
drmFree(r->encoders);
drmFree(r);
r = 0;
}
err_allocs:
drmFree(U642VOID(conn.prop_values_ptr));
drmFree(U642VOID(conn.props_ptr));
if (U642VOID(conn.modes_ptr) != &stack_mode)
drmFree(U642VOID(conn.modes_ptr));
drmFree(U642VOID(conn.encoders_ptr));
return r;
}
drm_public drmModeConnectorPtr drmModeGetConnector(int fd, uint32_t connector_id)
{
return _drmModeGetConnector(fd, connector_id, 1);
}
drm_public drmModeConnectorPtr drmModeGetConnectorCurrent(int fd, uint32_t connector_id)
{
return _drmModeGetConnector(fd, connector_id, 0);
}
drm_public uint32_t drmModeConnectorGetPossibleCrtcs(int fd,
const drmModeConnector *connector)
{
drmModeEncoder *encoder;
int i;
uint32_t possible_crtcs;
possible_crtcs = 0;
for (i = 0; i < connector->count_encoders; i++) {
encoder = drmModeGetEncoder(fd, connector->encoders[i]);
if (!encoder) {
return 0;
}
possible_crtcs |= encoder->possible_crtcs;
drmModeFreeEncoder(encoder);
}
if (possible_crtcs == 0)
errno = ENOENT;
return possible_crtcs;
}
drm_public int drmModeAttachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
{
struct drm_mode_mode_cmd res;
memclear(res);
memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
res.connector_id = connector_id;
return DRM_IOCTL(fd, DRM_IOCTL_MODE_ATTACHMODE, &res);
}
drm_public int drmModeDetachMode(int fd, uint32_t connector_id, drmModeModeInfoPtr mode_info)
{
struct drm_mode_mode_cmd res;
memclear(res);
memcpy(&res.mode, mode_info, sizeof(struct drm_mode_modeinfo));
res.connector_id = connector_id;
return DRM_IOCTL(fd, DRM_IOCTL_MODE_DETACHMODE, &res);
}
drm_public drmModePropertyPtr drmModeGetProperty(int fd, uint32_t property_id)
{
struct drm_mode_get_property prop;
drmModePropertyPtr r;
memclear(prop);
prop.prop_id = property_id;
if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop))
return 0;
if (prop.count_values)
prop.values_ptr = VOID2U64(drmMalloc(prop.count_values * sizeof(uint64_t)));
if (prop.count_enum_blobs && (prop.flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)))
prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(struct drm_mode_property_enum)));
if (prop.count_enum_blobs && (prop.flags & DRM_MODE_PROP_BLOB)) {
prop.values_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
prop.enum_blob_ptr = VOID2U64(drmMalloc(prop.count_enum_blobs * sizeof(uint32_t)));
}
if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPERTY, &prop)) {
r = NULL;
goto err_allocs;
}
if (!(r = drmMalloc(sizeof(*r))))
goto err_allocs;
r->prop_id = prop.prop_id;
r->count_values = prop.count_values;
r->flags = prop.flags;
if (prop.count_values)
r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_values, sizeof(uint64_t));
if (prop.flags & (DRM_MODE_PROP_ENUM | DRM_MODE_PROP_BITMASK)) {
r->count_enums = prop.count_enum_blobs;
r->enums = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(struct drm_mode_property_enum));
} else if (prop.flags & DRM_MODE_PROP_BLOB) {
r->values = drmAllocCpy(U642VOID(prop.values_ptr), prop.count_enum_blobs, sizeof(uint32_t));
r->blob_ids = drmAllocCpy(U642VOID(prop.enum_blob_ptr), prop.count_enum_blobs, sizeof(uint32_t));
r->count_blobs = prop.count_enum_blobs;
}
strncpy(r->name, prop.name, DRM_PROP_NAME_LEN);
r->name[DRM_PROP_NAME_LEN-1] = 0;
err_allocs:
drmFree(U642VOID(prop.values_ptr));
drmFree(U642VOID(prop.enum_blob_ptr));
return r;
}
drm_public void drmModeFreeProperty(drmModePropertyPtr ptr)
{
if (!ptr)
return;
drmFree(ptr->values);
drmFree(ptr->enums);
drmFree(ptr->blob_ids);
drmFree(ptr);
}
drm_public drmModePropertyBlobPtr drmModeGetPropertyBlob(int fd,
uint32_t blob_id)
{
struct drm_mode_get_blob blob;
drmModePropertyBlobPtr r;
memclear(blob);
blob.blob_id = blob_id;
if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob))
return NULL;
if (blob.length)
blob.data = VOID2U64(drmMalloc(blob.length));
if (drmIoctl(fd, DRM_IOCTL_MODE_GETPROPBLOB, &blob)) {
r = NULL;
goto err_allocs;
}
if (!(r = drmMalloc(sizeof(*r))))
goto err_allocs;
r->id = blob.blob_id;
r->length = blob.length;
r->data = drmAllocCpy(U642VOID(blob.data), 1, blob.length);
err_allocs:
drmFree(U642VOID(blob.data));
return r;
}
static inline const uint32_t *
get_formats_ptr(const struct drm_format_modifier_blob *blob)
{
return (const uint32_t *)(((uint8_t *)blob) + blob->formats_offset);
}
static inline const struct drm_format_modifier *
get_modifiers_ptr(const struct drm_format_modifier_blob *blob)
{
return (const struct drm_format_modifier *)(((uint8_t *)blob) +
blob->modifiers_offset);
}
static bool _drmModeFormatModifierGetNext(const drmModePropertyBlobRes *blob,
drmModeFormatModifierIterator *iter)
{
const struct drm_format_modifier *blob_modifiers, *mod;
const struct drm_format_modifier_blob *fmt_mod_blob;
const uint32_t *blob_formats;
assert(blob && iter);
fmt_mod_blob = blob->data;
blob_modifiers = get_modifiers_ptr(fmt_mod_blob);
blob_formats = get_formats_ptr(fmt_mod_blob);
/* fmt_idx and mod_idx designate the number of processed formats
* and modifiers.
*/
if (iter->fmt_idx >= fmt_mod_blob->count_formats ||
iter->mod_idx >= fmt_mod_blob->count_modifiers)
return false;
iter->fmt = blob_formats[iter->fmt_idx];
iter->mod = DRM_FORMAT_MOD_INVALID;
/* From the latest valid found, get the next valid modifier */
while (iter->mod_idx < fmt_mod_blob->count_modifiers) {
mod = &blob_modifiers[iter->mod_idx++];
/* Check if the format that fmt_idx designates, belongs to
* this modifier 64-bit window selected via mod->offset.
*/
if (iter->fmt_idx < mod->offset ||
iter->fmt_idx >= mod->offset + 64)
continue;
if (!(mod->formats & (1 << (iter->fmt_idx - mod->offset))))
continue;
iter->mod = mod->modifier;
break;
}
if (iter->mod_idx == fmt_mod_blob->count_modifiers) {
iter->mod_idx = 0;
iter->fmt_idx++;
}
/* Since mod_idx reset, in order for the caller to iterate over
* the last modifier of the last format, always return true here
* and early return from the next call.
*/
return true;
}
/**
* Iterate over formats first and then over modifiers. On each call, iter->fmt
* is retained until all associated modifiers are returned. Then, either update
* iter->fmt with the next format, or exit if there aren't any left.
*
* NOTE: clients should not make any assumption on mod_idx and fmt_idx values
*
* @blob: valid kernel blob holding formats and modifiers
* @iter: input and output iterator data. Iter data must be initialised to zero
* @return: false, on error or there aren't any further formats or modifiers left.
* true, on success and there are more formats or modifiers.
*/
drm_public bool drmModeFormatModifierBlobIterNext(const drmModePropertyBlobRes *blob,
drmModeFormatModifierIterator *iter)
{
drmModeFormatModifierIterator tmp;
bool has_fmt;
if (!blob || !iter)
return false;
tmp.fmt_idx = iter->fmt_idx;
tmp.mod_idx = iter->mod_idx;
/* With the current state of things, DRM/KMS drivers are allowed to
* construct blobs having formats and no modifiers. Userspace can't
* legitimately abort in such cases.
*
* While waiting for the kernel to perhaps disallow formats with no
* modifiers in IN_FORMATS blobs, skip the format altogether.
*/
do {
has_fmt = _drmModeFormatModifierGetNext(blob, &tmp);
if (has_fmt && tmp.mod != DRM_FORMAT_MOD_INVALID)
*iter = tmp;
} while (has_fmt && tmp.mod == DRM_FORMAT_MOD_INVALID);
return has_fmt;
}
drm_public void drmModeFreePropertyBlob(drmModePropertyBlobPtr ptr)
{
if (!ptr)
return;
drmFree(ptr->data);
drmFree(ptr);
}
drm_public int drmModeConnectorSetProperty(int fd, uint32_t connector_id,
uint32_t property_id,
uint64_t value)
{
struct drm_mode_connector_set_property osp;
memclear(osp);
osp.connector_id = connector_id;
osp.prop_id = property_id;
osp.value = value;
return DRM_IOCTL(fd, DRM_IOCTL_MODE_SETPROPERTY, &osp);
}
/*
* checks if a modesetting capable driver has attached to the pci id
* returns 0 if modesetting supported.
* -EINVAL or invalid bus id
* -ENOSYS if no modesetting support
*/
drm_public int drmCheckModesettingSupported(const char *busid)
{
#if defined (__linux__)
char pci_dev_dir[1024];
int domain, bus, dev, func;
DIR *sysdir;
struct dirent *dent;
int found = 0, ret;
ret = sscanf(busid, "pci:%04x:%02x:%02x.%d", &domain, &bus, &dev, &func);
if (ret != 4)
return -EINVAL;
sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/drm",
domain, bus, dev, func);
sysdir = opendir(pci_dev_dir);
if (sysdir) {
dent = readdir(sysdir);
while (dent) {
if (!strncmp(dent->d_name, "controlD", 8)) {
found = 1;
break;
}
dent = readdir(sysdir);
}
closedir(sysdir);
if (found)
return 0;
}
sprintf(pci_dev_dir, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/",
domain, bus, dev, func);
sysdir = opendir(pci_dev_dir);
if (!sysdir)
return -EINVAL;
dent = readdir(sysdir);
while (dent) {
if (!strncmp(dent->d_name, "drm:controlD", 12)) {
found = 1;
break;
}
dent = readdir(sysdir);
}
closedir(sysdir);
if (found)
return 0;
#elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
char sbusid[1024];
char oid[128];
int i, modesetting, ret;
size_t len;
/* How many GPUs do we expect in the machine ? */
for (i = 0; i < 10; i++) {
snprintf(oid, sizeof(oid), "hw.dri.%d.busid", i);
len = sizeof(sbusid);
ret = sysctlbyname(oid, sbusid, &len, NULL, 0);
if (ret == -1) {
if (errno == ENOENT)
continue;
return -EINVAL;
}
if (strcmp(sbusid, busid) != 0)
continue;
snprintf(oid, sizeof(oid), "hw.dri.%d.modesetting", i);
len = sizeof(modesetting);
ret = sysctlbyname(oid, &modesetting, &len, NULL, 0);
if (ret == -1 || len != sizeof(modesetting))
return -EINVAL;
return (modesetting ? 0 : -ENOSYS);
}
#elif defined(__DragonFly__)
return 0;
#elif defined(__OpenBSD__)
int fd;
struct drm_mode_card_res res;
drmModeResPtr r = 0;
if ((fd = drmOpen(NULL, busid)) < 0)
return -EINVAL;
memset(&res, 0, sizeof(struct drm_mode_card_res));
if (drmIoctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res)) {
drmClose(fd);
return -errno;
}
drmClose(fd);
return 0;
#endif
return -ENOSYS;
}
drm_public int drmModeCrtcGetGamma(int fd, uint32_t crtc_id, uint32_t size,