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authorDaniel Vetter <daniel.vetter@ffwll.ch>2019-01-29 11:42:47 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2019-01-29 15:45:12 +0100
commit0e2a933b02c972919f7478364177eb76cd4ae00d (patch)
tree01650e9674e332cf9ccb618bfe0757326a960a6f /include/drm
parent5b38e7475e3dc54c1091ee169fd050b3f10461fc (diff)
downloadlinux-0e2a933b02c972919f7478364177eb76cd4ae00d.tar.bz2
drm: Switch DRIVER_ flags to an enum
And move the documenation we alreay have into kerneldoc, plus a bit of polish while at it. v2: - Ditch FIXME from commit message, I've resolved that already before sending out the first version. - Put the legacy DRIVER_ flags at the end (Sam). Cc: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Emil Velikov <emil.velikov@collabora.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190129104248.26607-2-daniel.vetter@ffwll.ch
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drm_drv.h141
1 files changed, 124 insertions, 17 deletions
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index e32c12877bc5..0760a1d7b6c2 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -41,21 +41,123 @@ struct drm_display_mode;
struct drm_mode_create_dumb;
struct drm_printer;
-/* driver capabilities and requirements mask */
-#define DRIVER_USE_AGP 0x1
-#define DRIVER_LEGACY 0x2
-#define DRIVER_PCI_DMA 0x8
-#define DRIVER_SG 0x10
-#define DRIVER_HAVE_DMA 0x20
-#define DRIVER_HAVE_IRQ 0x40
-#define DRIVER_IRQ_SHARED 0x80
-#define DRIVER_GEM 0x1000
-#define DRIVER_MODESET 0x2000
-#define DRIVER_PRIME 0x4000
-#define DRIVER_RENDER 0x8000
-#define DRIVER_ATOMIC 0x10000
-#define DRIVER_KMS_LEGACY_CONTEXT 0x20000
-#define DRIVER_SYNCOBJ 0x40000
+/**
+ * enum drm_driver_feature - feature flags
+ *
+ * See &drm_driver.driver_features, drm_device.driver_features and
+ * drm_core_check_feature().
+ */
+enum drm_driver_feature {
+ /**
+ * @DRIVER_GEM:
+ *
+ * Driver use the GEM memory manager. This should be set for all modern
+ * drivers.
+ */
+ DRIVER_GEM = BIT(0),
+ /**
+ * @DRIVER_MODESET:
+ *
+ * Driver supports mode setting interfaces (KMS).
+ */
+ DRIVER_MODESET = BIT(1),
+ /**
+ * @DRIVER_PRIME:
+ *
+ * Driver implements DRM PRIME buffer sharing.
+ */
+ DRIVER_PRIME = BIT(2),
+ /**
+ * @DRIVER_RENDER:
+ *
+ * Driver supports dedicated render nodes. See also the :ref:`section on
+ * render nodes <drm_render_node>` for details.
+ */
+ DRIVER_RENDER = BIT(3),
+ /**
+ * @DRIVER_ATOMIC:
+ *
+ * Driver supports the full atomic modesetting userspace API. Drivers
+ * which only use atomic internally, but do not the support the full
+ * userspace API (e.g. not all properties converted to atomic, or
+ * multi-plane updates are not guaranteed to be tear-free) should not
+ * set this flag.
+ */
+ DRIVER_ATOMIC = BIT(4),
+ /**
+ * @DRIVER_SYNCOBJ:
+ *
+ * Driver supports &drm_syncobj for explicit synchronization of command
+ * submission.
+ */
+ DRIVER_SYNCOBJ = BIT(5),
+
+ /* IMPORTANT: Below are all the legacy flags, add new ones above. */
+
+ /**
+ * @DRIVER_USE_AGP:
+ *
+ * Set up DRM AGP support, see drm_agp_init(), the DRM core will manage
+ * AGP resources. New drivers don't need this.
+ */
+ DRIVER_USE_AGP = BIT(24),
+ /**
+ * @DRIVER_LEGACY:
+ *
+ * Denote a legacy driver using shadow attach. Do not use.
+ */
+ DRIVER_LEGACY = BIT(25),
+ /**
+ * @DRIVER_PCI_DMA:
+ *
+ * Driver is capable of PCI DMA, mapping of PCI DMA buffers to userspace
+ * will be enabled. Only for legacy drivers. Do not use.
+ */
+ DRIVER_PCI_DMA = BIT(26),
+ /**
+ * @DRIVER_SG:
+ *
+ * Driver can perform scatter/gather DMA, allocation and mapping of
+ * scatter/gather buffers will be enabled. Only for legacy drivers. Do
+ * not use.
+ */
+ DRIVER_SG = BIT(27),
+
+ /**
+ * @DRIVER_HAVE_DMA:
+ *
+ * Driver supports DMA, the userspace DMA API will be supported. Only
+ * for legacy drivers. Do not use.
+ */
+ DRIVER_HAVE_DMA = BIT(28),
+ /**
+ * @DRIVER_HAVE_IRQ:
+ *
+ * Legacy irq support. Only for legacy drivers. Do not use.
+ *
+ * New drivers can either use the drm_irq_install() and
+ * drm_irq_uninstall() helper functions, or roll their own irq support
+ * code by calling request_irq() directly.
+ */
+ DRIVER_HAVE_IRQ = BIT(29),
+ /**
+ * @DRIVER_IRQ_SHARED:
+ *
+ * Indicates to drm_irq_install() that a shared irq should be requested.
+ *
+ * FIXME: This should be an explicit argument for non-legacy drivers, or
+ * at least the default for PCI devices (which would cover all current
+ * users).
+ */
+ DRIVER_IRQ_SHARED = BIT(30),
+ /**
+ * @DRIVER_KMS_LEGACY_CONTEXT:
+ *
+ * Used only by nouveau for backwards compatibility with existing
+ * userspace. Do not use.
+ */
+ DRIVER_KMS_LEGACY_CONTEXT = BIT(31),
+};
/**
* struct drm_driver - DRM driver structure
@@ -579,7 +681,12 @@ struct drm_driver {
/** @date: driver date */
char *date;
- /** @driver_features: driver features */
+ /**
+ * @driver_features:
+ * Driver features, see &enum drm_driver_feature. Drivers can disable
+ * some features on a per-instance basis using
+ * &drm_device.driver_features.
+ */
u32 driver_features;
/**
@@ -666,7 +773,7 @@ static inline bool drm_dev_is_unplugged(struct drm_device *dev)
* @feature: feature flag
*
* This checks @dev for driver features, see &drm_driver.driver_features,
- * &drm_device.driver_features, and the various DRIVER_\* flags.
+ * &drm_device.driver_features, and the various &enum drm_driver_feature flags.
*
* Returns true if the @feature is supported, false otherwise.
*/