modesetting: stop caching mode resources

There is no need to cache the mode resources and with dynamic
connectors for mst support we don't want to. So first clean that
up before adding dynamic connector support.
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

hw/xfree86/drivers/modesetting/drmmode_display.c

@@ -687,7 +687,7 @@ drmmode_crtc_vblank_pipe(int crtc_id)
 }
 
 static void
-drmmode_crtc_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
+drmmode_crtc_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, drmModeResPtr mode_res, int num)
 {
     xf86CrtcPtr crtc;
     drmmode_crtc_private_ptr drmmode_crtc;
@@ -698,7 +698,7 @@ drmmode_crtc_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
 
     drmmode_crtc = xnfcalloc(sizeof(drmmode_crtc_private_rec), 1);
     drmmode_crtc->mode_crtc =
-        drmModeGetCrtc(drmmode->fd, drmmode->mode_res->crtcs[num]);
+        drmModeGetCrtc(drmmode->fd, mode_res->crtcs[num]);
     drmmode_crtc->drmmode = drmmode;
     drmmode_crtc->vblank_pipe = drmmode_crtc_vblank_pipe(num);
     crtc->driver_private = drmmode_crtc;
@@ -1112,7 +1112,7 @@ static const char *const output_names[] = {
 };
 
 static void
-drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
+drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, drmModeResPtr mode_res, int num)
 {
     xf86OutputPtr output;
     drmModeConnectorPtr koutput;
@@ -1123,7 +1123,7 @@ drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
     int i;
 
     koutput =
-        drmModeGetConnector(drmmode->fd, drmmode->mode_res->connectors[num]);
+        drmModeGetConnector(drmmode->fd, mode_res->connectors[num]);
     if (!koutput)
         return;
 
@@ -1161,7 +1161,7 @@ drmmode_output_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int num)
         goto out_free_encoders;
     }
 
-    drmmode_output->output_id = drmmode->mode_res->connectors[num];
+    drmmode_output->output_id = mode_res->connectors[num];
     drmmode_output->mode_output = koutput;
     drmmode_output->mode_encoders = kencoders;
     drmmode_output->drmmode = drmmode;
@@ -1231,7 +1231,7 @@ find_clones(ScrnInfoPtr scrn, xf86OutputPtr output)
 }
 
 static void
-drmmode_clones_init(ScrnInfoPtr scrn, drmmode_ptr drmmode)
+drmmode_clones_init(ScrnInfoPtr scrn, drmmode_ptr drmmode, drmModeResPtr mode_res)
 {
     int i, j;
     xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
@@ -1246,8 +1246,8 @@ drmmode_clones_init(ScrnInfoPtr scrn, drmmode_ptr drmmode)
         for (j = 0; j < drmmode_output->mode_output->count_encoders; j++) {
             int k;
 
-            for (k = 0; k < drmmode->mode_res->count_encoders; k++) {
-                if (drmmode->mode_res->encoders[k] ==
+            for (k = 0; k < mode_res->count_encoders; k++) {
+                if (mode_res->encoders[k] ==
                     drmmode_output->mode_encoders[j]->encoder_id)
                     drmmode_output->enc_mask |= (1 << k);
             }
@@ -1425,6 +1425,7 @@ drmmode_pre_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int cpp)
     int i;
     int ret;
     uint64_t value = 0;
+    drmModeResPtr mode_res;
 
     /* check for dumb capability */
     ret = drmGetCap(drmmode->fd, DRM_CAP_DUMB_BUFFER, &value);
@@ -1438,23 +1439,24 @@ drmmode_pre_init(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int cpp)
 
     drmmode->scrn = pScrn;
     drmmode->cpp = cpp;
-    drmmode->mode_res = drmModeGetResources(drmmode->fd);
-    if (!drmmode->mode_res)
+    mode_res = drmModeGetResources(drmmode->fd);
+    if (!mode_res)
         return FALSE;
 
-    xf86CrtcSetSizeRange(pScrn, 320, 200, drmmode->mode_res->max_width,
-                         drmmode->mode_res->max_height);
-    for (i = 0; i < drmmode->mode_res->count_crtcs; i++)
+    xf86CrtcSetSizeRange(pScrn, 320, 200, mode_res->max_width,
+                         mode_res->max_height);
+    for (i = 0; i < mode_res->count_crtcs; i++)
         if (!xf86IsEntityShared(pScrn->entityList[0]) ||
             pScrn->confScreen->device->screen == i)
-            drmmode_crtc_init(pScrn, drmmode, i);
+            drmmode_crtc_init(pScrn, drmmode, mode_res, i);
 
-    for (i = 0; i < drmmode->mode_res->count_connectors; i++)
-        drmmode_output_init(pScrn, drmmode, i);
+    for (i = 0; i < mode_res->count_connectors; i++)
+        drmmode_output_init(pScrn, drmmode, mode_res, i);
 
     /* workout clones */
-    drmmode_clones_init(pScrn, drmmode);
+    drmmode_clones_init(pScrn, drmmode, mode_res);
 
+    drmModeFreeResources(mode_res);
 #if XF86_CRTC_VERSION >= 5
     xf86ProviderSetup(pScrn, NULL, "modesetting");
 #endif

hw/xfree86/drivers/modesetting/drmmode_display.h

@@ -47,7 +47,6 @@ typedef struct {
     int fd;
     unsigned fb_id;
     unsigned old_fb_id;
-    drmModeResPtr mode_res;
     drmModeFBPtr mode_fb;
     int cpp;
     ScrnInfoPtr scrn;