[PATCH v14 40/41] compositor-drm: Support plane IN_FORMATS
Daniel Stone
daniels at collabora.com
Wed Dec 20 12:26:57 UTC 2017
From: Sergi Granell <xerpi.g.12 at gmail.com>
The per-plane IN_FORMATS property adds information about format
modifiers; we can use these to both feed GBM with the set of modifiers
we want to use for rendering, and also as an early-out test when we're
trying to see if a FB will go on a particular plane.
Signed-off-by: Sergi Granell <xerpi.g.12 at gmail.com>
Reviewed-by: Daniel Stone <daniels at collabora.com>
Signed-off-by: Daniel Stone <daniels at collabora.com>
---
configure.ac | 3 ++
libweston/compositor-drm.c | 128 +++++++++++++++++++++++++++++++++++++++++----
2 files changed, 122 insertions(+), 9 deletions(-)
diff --git a/configure.ac b/configure.ac
index 8d0d6582a..bc6fefc1e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -212,6 +212,9 @@ if test x$enable_drm_compositor = xyes; then
PKG_CHECK_MODULES(DRM_COMPOSITOR_ATOMIC, [libdrm >= 2.4.78],
[AC_DEFINE([HAVE_DRM_ATOMIC], 1, [libdrm supports atomic API])],
[AC_MSG_WARN([libdrm does not support atomic modesetting, will omit that capability])])
+ PKG_CHECK_MODULES(DRM_COMPOSITOR_FORMATS_BLOB, [libdrm >= 2.4.83],
+ [AC_DEFINE([HAVE_DRM_FORMATS_BLOB], 1, [libdrm supports modifier advertisement])],
+ [AC_MSG_WARN([libdrm does not support modifier advertisement])])
PKG_CHECK_MODULES(DRM_COMPOSITOR_GBM, [gbm >= 17.2],
[AC_DEFINE([HAVE_GBM_FD_IMPORT], 1, [gbm supports import with modifiers])],
[AC_MSG_WARN([GBM does not support dmabuf import, will omit that capability])])
diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
index cb1c23b03..ba2217fc0 100644
--- a/libweston/compositor-drm.c
+++ b/libweston/compositor-drm.c
@@ -83,6 +83,20 @@
#define GBM_BO_USE_CURSOR GBM_BO_USE_CURSOR_64X64
#endif
+#ifdef HAVE_DRM_FORMATS_BLOB
+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);
+}
+#endif
+
/**
* Represents the values of an enum-type KMS property
*/
@@ -127,6 +141,7 @@ enum wdrm_plane_property {
WDRM_PLANE_CRTC_H,
WDRM_PLANE_FB_ID,
WDRM_PLANE_CRTC_ID,
+ WDRM_PLANE_IN_FORMATS,
WDRM_PLANE__COUNT
};
@@ -168,6 +183,7 @@ static const struct drm_property_info plane_props[] = {
[WDRM_PLANE_CRTC_H] = { .name = "CRTC_H", },
[WDRM_PLANE_FB_ID] = { .name = "FB_ID", },
[WDRM_PLANE_CRTC_ID] = { .name = "CRTC_ID", },
+ [WDRM_PLANE_IN_FORMATS] = { .name = "IN_FORMATS" },
};
/**
@@ -403,7 +419,11 @@ struct drm_plane {
struct wl_list link;
- uint32_t formats[];
+ struct {
+ uint32_t format;
+ uint32_t count_modifiers;
+ uint64_t *modifiers;
+ } formats[];
};
struct drm_output {
@@ -2879,7 +2899,19 @@ drm_output_prepare_overlay_view(struct drm_output_state *output_state,
/* Check whether the format is supported */
for (i = 0; i < p->count_formats; i++) {
- if (p->formats[i] == fb->format->format)
+ unsigned int j;
+
+ if (p->formats[i].format != fb->format->format)
+ continue;
+
+ if (fb->modifier == DRM_FORMAT_MOD_INVALID)
+ break;
+
+ for (j = 0; j < p->formats[i].count_modifiers; j++) {
+ if (p->formats[i].modifiers[j] == fb->modifier)
+ break;
+ }
+ if (j != p->formats[i].count_modifiers)
break;
}
if (i == p->count_formats)
@@ -3635,6 +3667,61 @@ init_pixman(struct drm_backend *b)
return pixman_renderer_init(b->compositor);
}
+/**
+ * Populates the formats array, and the modifiers of each format for a drm_plane.
+ */
+#ifdef HAVE_DRM_FORMATS_BLOB
+static bool
+populate_format_modifiers(struct drm_plane *plane, const drmModePlane *kplane,
+ uint32_t blob_id)
+{
+ unsigned i, j;
+ drmModePropertyBlobRes *blob;
+ struct drm_format_modifier_blob *fmt_mod_blob;
+ uint32_t *blob_formats;
+ struct drm_format_modifier *blob_modifiers;
+
+ blob = drmModeGetPropertyBlob(plane->backend->drm.fd, blob_id);
+ if (!blob)
+ return false;
+
+ fmt_mod_blob = blob->data;
+ blob_formats = formats_ptr(fmt_mod_blob);
+ blob_modifiers = modifiers_ptr(fmt_mod_blob);
+
+ assert(plane->count_formats == fmt_mod_blob->count_formats);
+
+ for (i = 0; i < fmt_mod_blob->count_formats; i++) {
+ uint32_t count_modifiers = 0;
+ uint64_t *modifiers = NULL;
+
+ 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;
+
+ modifiers = realloc(modifiers, (count_modifiers + 1) * sizeof(modifiers[0]));
+ if (!modifiers) {
+ drmModeFreePropertyBlob(blob);
+ return false;
+ }
+ modifiers[count_modifiers++] = mod->modifier;
+ }
+
+ plane->formats[i].format = blob_formats[i];
+ plane->formats[i].modifiers = modifiers;
+ plane->formats[i].count_modifiers = count_modifiers;
+ }
+
+ drmModeFreePropertyBlob(blob);
+
+ return true;
+}
+#endif
+
/**
* Create a drm_plane for a hardware plane
*
@@ -3664,25 +3751,27 @@ drm_plane_create(struct drm_backend *b, const drmModePlane *kplane,
{
struct drm_plane *plane;
drmModeObjectProperties *props;
- int num_formats = (kplane) ? kplane->count_formats : 1;
+ uint32_t num_formats = (kplane) ? kplane->count_formats : 1;
plane = zalloc(sizeof(*plane) +
- (sizeof(uint32_t) * num_formats));
+ (sizeof(plane->formats[0]) * num_formats));
if (!plane) {
weston_log("%s: out of memory\n", __func__);
return NULL;
}
plane->backend = b;
+ plane->count_formats = num_formats;
plane->state_cur = drm_plane_state_alloc(NULL, plane);
plane->state_cur->complete = true;
if (kplane) {
+#ifdef HAVE_DRM_FORMATS_BLOB
+ uint32_t blob_id;
+#endif
+
plane->possible_crtcs = kplane->possible_crtcs;
plane->plane_id = kplane->plane_id;
- plane->count_formats = kplane->count_formats;
- memcpy(plane->formats, kplane->formats,
- kplane->count_formats * sizeof(kplane->formats[0]));
props = drmModeObjectGetProperties(b->drm.fd, kplane->plane_id,
DRM_MODE_OBJECT_PLANE);
@@ -3696,13 +3785,34 @@ drm_plane_create(struct drm_backend *b, const drmModePlane *kplane,
drm_property_get_value(&plane->props[WDRM_PLANE_TYPE],
props,
WDRM_PLANE_TYPE__COUNT);
+
+#ifdef HAVE_DRM_FORMATS_BLOB
+ blob_id = drm_property_get_value(&plane->props[WDRM_PLANE_IN_FORMATS],
+ props,
+ 0);
+ if (blob_id) {
+ if (!populate_format_modifiers(plane, kplane, blob_id)) {
+ weston_log("%s: out of memory\n", __func__);
+ drm_property_info_free(plane->props, WDRM_PLANE__COUNT);
+ drmModeFreeObjectProperties(props);
+ free(plane);
+ return NULL;
+ }
+ } else
+#endif
+ {
+ uint32_t i;
+ for (i = 0; i < kplane->count_formats; i++)
+ plane->formats[i].format = kplane->formats[i];
+ }
+
drmModeFreeObjectProperties(props);
}
else {
plane->possible_crtcs = (1 << output->pipe);
plane->plane_id = 0;
plane->count_formats = 1;
- plane->formats[0] = format;
+ plane->formats[0].format = format;
plane->type = type;
}
@@ -4768,7 +4878,7 @@ drm_output_set_gbm_format(struct weston_output *base,
* supported by the primary plane; we just hope that the GBM format
* works. */
if (!b->universal_planes)
- output->scanout_plane->formats[0] = output->gbm_format;
+ output->scanout_plane->formats[0].format = output->gbm_format;
}
static void
--
2.14.3
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