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drm-backend: stop parsing IN_FORMATS blobs, use libdrm instead

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Before this change the drm-backend in Weston did the work of parsing DRM
blobs in order to query IN_FORMATS data, if available. This is also the
case for other DRM/KMS clients that use IN_FORMATS (i.e. X).

libdrm 2.4.108 with e641e2a6 ("xf86drm: add iterator API for DRM/KMS
IN_FORMATS blobs") introduced a dedicated API for querying IN_FORMATS data.

Bump the minimum required version to 2.4.108, stop parsing IN_FORMATS in
Weston and start using DRM iterators. In addition, remove fallback code for
libdrm <2.4.107.

Signed-off-by: Luigi Santivetti <luigi.santivetti@imgtec.com>
This commit is contained in:
Luigi Santivetti 2022-02-22 22:56:42 +00:00
parent 08a821f291
commit a62bf5ff48
3 changed files with 17 additions and 62 deletions
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61
libweston/backend-drm/kms.c
View file

@ -414,19 +414,6 @@ drm_property_info_free(struct drm_property_info *info, int num_props)
memset(info, 0, sizeof(*info) * num_props);
}
static inline uint32_t *
formats_ptr(struct drm_format_modifier_blob *blob)
{
return (uint32_t *)(((char *)blob) + blob->formats_offset);
}
static inline struct drm_format_modifier *
modifiers_ptr(struct drm_format_modifier_blob *blob)
{
return (struct drm_format_modifier *)
(((char *)blob) + blob->modifiers_offset);
}
/**
* Populates the plane's formats array, using either the IN_FORMATS blob
* property (if available), or the plane's format list if not.
@ -437,13 +424,10 @@ drm_plane_populate_formats(struct drm_plane *plane, const drmModePlane *kplane,
const bool use_modifiers)
{
struct drm_device *device = plane->device;
unsigned i, j;
uint32_t i, blob_id, fmt_prev = DRM_FORMAT_INVALID;
drmModeFormatModifierIterator drm_iter = {0};
struct weston_drm_format *fmt = NULL;
drmModePropertyBlobRes *blob = NULL;
struct drm_format_modifier_blob *fmt_mod_blob;
struct drm_format_modifier *blob_modifiers;
uint32_t *blob_formats;
uint32_t blob_id;
struct weston_drm_format *fmt;
int ret = 0;
if (!use_modifiers)
@ -459,35 +443,22 @@ drm_plane_populate_formats(struct drm_plane *plane, const drmModePlane *kplane,
if (!blob)
goto fallback;
fmt_mod_blob = blob->data;
blob_formats = formats_ptr(fmt_mod_blob);
blob_modifiers = modifiers_ptr(fmt_mod_blob);
assert(kplane->count_formats == fmt_mod_blob->count_formats);
for (i = 0; i < fmt_mod_blob->count_formats; i++) {
fmt = weston_drm_format_array_add_format(&plane->formats,
blob_formats[i]);
if (!fmt) {
ret = -1;
goto out;
}
for (j = 0; j < fmt_mod_blob->count_modifiers; j++) {
struct drm_format_modifier *mod = &blob_modifiers[j];
if ((i < mod->offset) || (i > mod->offset + 63))
continue;
if (!(mod->formats & (1 << (i - mod->offset))))
continue;
ret = weston_drm_format_add_modifier(fmt, mod->modifier);
if (ret < 0)
while (drmModeFormatModifierBlobIterNext(blob, &drm_iter)) {
if (fmt_prev != drm_iter.fmt) {
fmt = weston_drm_format_array_add_format(&plane->formats,
drm_iter.fmt);
if (!fmt) {
ret = -1;
goto out;
}
fmt_prev = drm_iter.fmt;
}
if (fmt->modifiers.size == 0)
weston_drm_format_array_remove_latest_format(&plane->formats);
ret = weston_drm_format_add_modifier(fmt, drm_iter.mod);
if (ret < 0)
goto out;
}
out:

10
libweston/pixel-formats.c
View file

@ -708,7 +708,6 @@ pixel_format_height_for_plane(const struct pixel_format_info *info,
return height / pixel_format_vsub(info, plane);
}
#ifdef HAVE_HUMAN_FORMAT_MODIFIER
WL_EXPORT char *
pixel_format_get_modifier(uint64_t modifier)
{
@ -748,12 +747,3 @@ pixel_format_get_modifier(uint64_t modifier)
return mod_str;
}
#else
WL_EXPORT char *
pixel_format_get_modifier(uint64_t modifier)
{
char *mod_str;
str_printf(&mod_str, "0x%llx", (unsigned long long) modifier);
return mod_str;
}
#endif

8
meson.build
View file

@ -148,16 +148,10 @@ dep_libinput = dependency('libinput', version: '>= 0.8.0')
dep_libevdev = dependency('libevdev')
dep_libm = cc.find_library('m')
dep_libdl = cc.find_library('dl')
dep_libdrm = dependency('libdrm', version: '>= 2.4.95')
dep_libdrm = dependency('libdrm', version: '>= 2.4.108')
dep_libdrm_headers = dep_libdrm.partial_dependency(compile_args: true)
dep_threads = dependency('threads')
dep_libdrm_version = dep_libdrm.version()
if dep_libdrm_version.version_compare('>=2.4.107')
message('Found libdrm with human format modifier support.')
config_h.set('HAVE_HUMAN_FORMAT_MODIFIER', '1')
endif
dep_lcms2 = dependency('lcms2', version: '>= 2.9', required: false)
prog_python = import('python').find_installation('python3')