The LINEAR modifier is advertised as default if a driver doesn't specify modifiers. However, there are legacy drivers such as radeon that do not support modifiers but infer the actual layout of the underlying buffer. Therefore, a new flag not_support_fb_modifires is introduced for these legacy drivers. Allow_fb_modifiers will be replaced with this new flag.
Signed-off-by: Tomohito Esaki etom@igel.co.jp --- drivers/gpu/drm/drm_plane.c | 15 ++++++++++++--- include/drm/drm_mode_config.h | 10 ++++++++++ include/drm/drm_plane.h | 3 +++ 3 files changed, 25 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index deeec60a3315..5aa7e241971e 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -237,6 +237,10 @@ static int __drm_universal_plane_init(struct drm_device *dev, const char *name, va_list ap) { struct drm_mode_config *config = &dev->mode_config; + const uint64_t default_modifiers[] = { + DRM_FORMAT_MOD_LINEAR, + DRM_FORMAT_MOD_INVALID + }; unsigned int format_modifier_count = 0; int ret;
@@ -277,6 +281,11 @@ static int __drm_universal_plane_init(struct drm_device *dev,
while (*temp_modifiers++ != DRM_FORMAT_MOD_INVALID) format_modifier_count++; + } else { + if (!dev->mode_config.fb_modifiers_not_supported) { + format_modifiers = default_modifiers; + format_modifier_count = 1; + } }
/* autoset the cap and check for consistency across all planes */ @@ -341,7 +350,7 @@ static int __drm_universal_plane_init(struct drm_device *dev, drm_object_attach_property(&plane->base, config->prop_src_h, 0); }
- if (config->allow_fb_modifiers) + if (format_modifier_count) create_in_format_blob(dev, plane);
return 0; @@ -368,8 +377,8 @@ static int __drm_universal_plane_init(struct drm_device *dev, * drm_universal_plane_init() to let the DRM managed resource infrastructure * take care of cleanup and deallocation. * - * Drivers supporting modifiers must set @format_modifiers on all their planes, - * even those that only support DRM_FORMAT_MOD_LINEAR. + * For drivers supporting modifiers, all planes will advertise + * DRM_FORMAT_MOD_LINEAR support, if @format_modifiers is not set. * * Returns: * Zero on success, error code on failure. diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index 48b7de80daf5..c56f298c55bd 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -920,6 +920,16 @@ struct drm_mode_config { */ bool allow_fb_modifiers;
+ /** + * @fb_modifiers_not_supported: + * + * This flag is for legacy drivers such as radeon that do not support + * modifiers but infer the actual layout of the underlying buffer. + * Generally, each drivers must support modifiers, this flag should not + * be set. + */ + bool fb_modifiers_not_supported; + /** * @normalize_zpos: * diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index 0c1102dc4d88..cad641b1f797 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -803,6 +803,9 @@ void *__drmm_universal_plane_alloc(struct drm_device *dev, * * The @drm_plane_funcs.destroy hook must be NULL. * + * For drivers supporting modifiers, all planes will advertise + * DRM_FORMAT_MOD_LINEAR support, if @format_modifiers is not set. + * * Returns: * Pointer to new plane, or ERR_PTR on failure. */