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authorLinus Torvalds <torvalds@linux-foundation.org>2018-11-02 20:58:20 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-11-02 20:58:20 +0300
commitbc6080ae38b3b0c6e8166f8561e993298095f7be (patch)
tree0d47e0ba5eab9a2993f61d5c5bcdbfafc68e892e /include/drm
parentd81f50bd34646d8373b989e55180c0fc9af94e0b (diff)
parentf9885ef875e9160454392f85159163674159c51f (diff)
downloadlinux-bc6080ae38b3b0c6e8166f8561e993298095f7be.tar.xz
Merge tag 'drm-next-2018-11-02' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie: "Pretty much a normal fixes pull pre-rc1, mostly amdgpu fixes, one i915 link training regression fix, and a couple of minor panel/bridge fixes and a panel quirk" * tag 'drm-next-2018-11-02' of git://anongit.freedesktop.org/drm/drm: (37 commits) drm/amdgpu: revert "enable gfxoff in non-sriov and stutter mode by default" drm/amd/pp: Print warning if od_sclk/mclk out of range drm/amd/pp: Fix pp_sclk/mclk_od not work on Vega10 drm/amd/pp: Fix pp_sclk/mclk_od not work on smu7 drm/amd/powerplay: no MGPU fan boost enablement on DPM disabled drm/amdgpu: Fix skipping hangged job reset during gpu recover. drm/amd/powerplay: revise Vega20 pptable version check drm/amd/display: set backlight level limit to 1 drm/panel: simple: Innolux TV123WAM is actually P120ZDG-BF1 dt-bindings: drm/panel: simple: Innolux TV123WAM is actually P120ZDG-BF1 drm/bridge: ti-sn65dsi86: Remove the mystery delay drm/panel: simple: Add "no-hpd" delay for Innolux TV123WAM drm/panel: simple: Support panels with HPD where HPD isn't connected dt-bindings: drm/panel: simple: Add no-hpd property drm/edid: Add 6 bpc quirk for BOE panel. drm/amdgpu: fix reporting of failed msg sent to SMU (v2) drm/amdgpu: Fix compute ring 1.0.0 failure after reset drm/amdgpu: fix VM leaf walking drm/amdgpu: fix amdgpu_vm_fini drm/amd/powerplay: commonize the API for retrieving current clocks ...
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drm_connector.h71
1 files changed, 69 insertions, 2 deletions
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 91a877fa00cb..9ccad6b062f2 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -82,6 +82,53 @@ enum drm_connector_status {
connector_status_unknown = 3,
};
+/**
+ * enum drm_connector_registration_status - userspace registration status for
+ * a &drm_connector
+ *
+ * This enum is used to track the status of initializing a connector and
+ * registering it with userspace, so that DRM can prevent bogus modesets on
+ * connectors that no longer exist.
+ */
+enum drm_connector_registration_state {
+ /**
+ * @DRM_CONNECTOR_INITIALIZING: The connector has just been created,
+ * but has yet to be exposed to userspace. There should be no
+ * additional restrictions to how the state of this connector may be
+ * modified.
+ */
+ DRM_CONNECTOR_INITIALIZING = 0,
+
+ /**
+ * @DRM_CONNECTOR_REGISTERED: The connector has been fully initialized
+ * and registered with sysfs, as such it has been exposed to
+ * userspace. There should be no additional restrictions to how the
+ * state of this connector may be modified.
+ */
+ DRM_CONNECTOR_REGISTERED = 1,
+
+ /**
+ * @DRM_CONNECTOR_UNREGISTERED: The connector has either been exposed
+ * to userspace and has since been unregistered and removed from
+ * userspace, or the connector was unregistered before it had a chance
+ * to be exposed to userspace (e.g. still in the
+ * @DRM_CONNECTOR_INITIALIZING state). When a connector is
+ * unregistered, there are additional restrictions to how its state
+ * may be modified:
+ *
+ * - An unregistered connector may only have its DPMS changed from
+ * On->Off. Once DPMS is changed to Off, it may not be switched back
+ * to On.
+ * - Modesets are not allowed on unregistered connectors, unless they
+ * would result in disabling its assigned CRTCs. This means
+ * disabling a CRTC on an unregistered connector is OK, but enabling
+ * one is not.
+ * - Removing a CRTC from an unregistered connector is OK, but new
+ * CRTCs may never be assigned to an unregistered connector.
+ */
+ DRM_CONNECTOR_UNREGISTERED = 2,
+};
+
enum subpixel_order {
SubPixelUnknown = 0,
SubPixelHorizontalRGB,
@@ -853,10 +900,12 @@ struct drm_connector {
bool ycbcr_420_allowed;
/**
- * @registered: Is this connector exposed (registered) with userspace?
+ * @registration_state: Is this connector initializing, exposed
+ * (registered) with userspace, or unregistered?
+ *
* Protected by @mutex.
*/
- bool registered;
+ enum drm_connector_registration_state registration_state;
/**
* @modes:
@@ -1166,6 +1215,24 @@ static inline void drm_connector_unreference(struct drm_connector *connector)
drm_connector_put(connector);
}
+/**
+ * drm_connector_is_unregistered - has the connector been unregistered from
+ * userspace?
+ * @connector: DRM connector
+ *
+ * Checks whether or not @connector has been unregistered from userspace.
+ *
+ * Returns:
+ * True if the connector was unregistered, false if the connector is
+ * registered or has not yet been registered with userspace.
+ */
+static inline bool
+drm_connector_is_unregistered(struct drm_connector *connector)
+{
+ return READ_ONCE(connector->registration_state) ==
+ DRM_CONNECTOR_UNREGISTERED;
+}
+
const char *drm_get_connector_status_name(enum drm_connector_status status);
const char *drm_get_subpixel_order_name(enum subpixel_order order);
const char *drm_get_dpms_name(int val);