xfree86: add framework for provider support in ddx. (v4)

This adds the framework for DDX provider support.

v2: as per keithp's suggestion remove the xf86 provider object
and just store it in the toplevel object.

v3: update for new protocol

v4: drop devPrivate, free name

Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

hw/xfree86/common/xf86str.h

@@ -814,6 +814,7 @@ typedef struct _ScrnInfoRec {
     funcPointer reservedFuncs[NUM_RESERVED_FUNCS];
 
     Bool is_gpu;
+    uint32_t capabilities;
 } ScrnInfoRec;
 
 typedef struct {

hw/xfree86/modes/xf86Crtc.c

@@ -738,6 +738,7 @@ xf86CrtcCloseScreen(ScreenPtr screen)
     }
     xf86RandR12CloseScreen(screen);
 
+    free(config->name);
     return screen->CloseScreen(screen);
 }
 
@@ -3202,3 +3203,20 @@ xf86_crtc_supports_gamma(ScrnInfoPtr pScrn)
 
     return FALSE;
 }
+
+void
+xf86ProviderSetup(ScrnInfoPtr scrn,
+                  const xf86ProviderFuncsRec *funcs, const char *name)
+{
+    xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
+
+    assert(!xf86_config->name);
+    assert(name);
+
+    xf86_config->name = strdup(name);
+    xf86_config->provider_funcs = funcs;
+#ifdef RANDR_12_INTERFACE
+    xf86_config->randr_provider = NULL;
+#endif
+}
+

hw/xfree86/modes/xf86Crtc.h

@@ -607,6 +607,29 @@ struct _xf86Output {
     INT16 initialBorder[4];
 };
 
+typedef struct _xf86ProviderFuncs {
+    /**
+     * Called to allow the provider a chance to create properties after the
+     * RandR objects have been created.
+     */
+    void
+    (*create_resources) (ScrnInfoPtr scrn);
+
+    /**
+     * Callback when an provider's property has changed.
+     */
+    Bool
+    (*set_property) (ScrnInfoPtr scrn,
+                     Atom property, RRPropertyValuePtr value);
+
+    /**
+     * Callback to get an updated property value
+     */
+    Bool
+    (*get_property) (ScrnInfoPtr provider, Atom property);
+
+} xf86ProviderFuncsRec, *xf86ProviderFuncsPtr;
+
 typedef struct _xf86CrtcConfigFuncs {
     /**
      * Requests that the driver resize the screen.
@@ -681,6 +704,13 @@ typedef struct _xf86CrtcConfig {
     /* callback when crtc configuration changes */
     xf86_crtc_notify_proc_ptr xf86_crtc_notify;
 
+    char *name;
+    const xf86ProviderFuncsRec *provider_funcs;
+#ifdef RANDR_12_INTERFACE
+    RRProviderPtr randr_provider;
+#else
+    void *randr_provider;
+#endif
 } xf86CrtcConfigRec, *xf86CrtcConfigPtr;
 
 extern _X_EXPORT int xf86CrtcConfigPrivateIndex;
@@ -975,4 +1005,8 @@ extern _X_EXPORT void
 extern _X_EXPORT Bool
  xf86_crtc_supports_gamma(ScrnInfoPtr pScrn);
 
+extern _X_EXPORT void
+xf86ProviderSetup(ScrnInfoPtr scrn,
+                  const xf86ProviderFuncsRec * funcs, const char *name);
+
 #endif                          /* _XF86CRTC_H_ */

hw/xfree86/modes/xf86RandR12.c

@@ -1552,6 +1552,14 @@ xf86RandR12CreateObjects12(ScreenPtr pScreen)
             output->funcs->create_resources(output);
         RRPostPendingProperties(output->randr_output);
     }
+
+    if (config->name) {
+        config->randr_provider = RRProviderCreate(pScreen, config->name,
+                                                  strlen(config->name));
+
+        RRProviderSetCapabilities(config->randr_provider, pScrn->capabilities);
+    }
+
     return TRUE;
 }
 
@@ -1745,6 +1753,42 @@ xf86RandR12EnterVT(ScrnInfoPtr pScrn)
     return RRGetInfo(pScreen, TRUE);    /* force a re-probe of outputs and notify clients about changes */
 }
 
+static Bool
+xf86RandR14ProviderSetProperty(ScreenPtr pScreen,
+                             RRProviderPtr randr_provider,
+                             Atom property, RRPropertyValuePtr value)
+{
+    ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
+    xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(pScrn);
+
+    /* If we don't have any property handler, then we don't care what the
+     * user is setting properties to.
+     */
+    if (config->provider_funcs->set_property == NULL)
+        return TRUE;
+
+    /*
+     * This function gets called even when vtSema is FALSE, as
+     * drivers will need to remember the correct value to apply
+     * when the VT switch occurs
+     */
+    return config->provider_funcs->set_property(pScrn, property, value);
+}
+
+static Bool
+xf86RandR14ProviderGetProperty(ScreenPtr pScreen,
+                               RRProviderPtr randr_provider, Atom property)
+{
+    ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
+    xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(pScrn);
+
+    if (config->provider_funcs->get_property == NULL)
+        return TRUE;
+
+    /* Should be safe even w/o vtSema */
+    return config->provider_funcs->get_property(pScrn, property);
+}
+
 static Bool
 xf86RandR12Init12(ScreenPtr pScreen)
 {
@@ -1767,6 +1811,10 @@ xf86RandR12Init12(ScreenPtr pScreen)
 #endif
     rp->rrModeDestroy = xf86RandR12ModeDestroy;
     rp->rrSetConfig = NULL;
+
+    rp->rrProviderSetProperty = xf86RandR14ProviderSetProperty;
+    rp->rrProviderGetProperty = xf86RandR14ProviderGetProperty;
+
     pScrn->PointerMoved = xf86RandR12PointerMoved;
     pScrn->ChangeGamma = xf86RandR12ChangeGamma;