Drop frontbuffer from crtc in I830CloseScreen

By dropping the frontbuffer from the crtc, the new frontbuffer
can be properly added to the crtc when the xserver is reset.

Signed-off-by: Albert Damen <albrt@gmx.net>

3 files changed, 17 insertions, 0 deletions

diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index c2ef514e..472bc742 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -1429,3 +1429,18 @@ drmmode_crtc_id(xf86CrtcPtr crtc)
 
         return drmmode_crtc->mode_crtc->crtc_id;
 }
+
+void drmmode_closefb(ScrnInfoPtr scrn)
+{
+        xf86CrtcConfigPtr xf86_config;
+        drmmode_crtc_private_ptr drmmode_crtc;
+        drmmode_ptr drmmode;
+
+        xf86_config = XF86_CRTC_CONFIG_PTR(scrn);
+
+        drmmode_crtc = xf86_config->crtc[0]->driver_private;
+        drmmode = drmmode_crtc->drmmode;
+
+        drmModeRmFB(drmmode->fd, drmmode->fb_id);
+        drmmode->fb_id = 0;
+}
diff --git a/src/i830.h b/src/i830.h
index 7a64f00e..2d7fc5ba 100644
--- a/src/i830.h
+++ b/src/i830.h
@@ -330,6 +330,7 @@ Bool I830DRI2ScreenInit(ScreenPtr pScreen);
 void I830DRI2CloseScreen(ScreenPtr pScreen);
 
 extern Bool drmmode_pre_init(ScrnInfoPtr scrn, int fd, int cpp);
+extern void drmmode_closefb(ScrnInfoPtr scrn);
 extern int drmmode_get_pipe_from_crtc_id(drm_intel_bufmgr * bufmgr,
                                          xf86CrtcPtr crtc);
 extern int drmmode_output_dpms_status(xf86OutputPtr output);
diff --git a/src/i830_driver.c b/src/i830_driver.c
index 47bc4dff..8b5e946f 100644
--- a/src/i830_driver.c
+++ b/src/i830_driver.c
@@ -1519,6 +1519,7 @@ static Bool I830CloseScreen(int scrnIndex, ScreenPtr screen)
         }
         if (intel->front_buffer) {
                 i830_set_pixmap_bo(screen->GetScreenPixmap(screen), NULL);
+                drmmode_closefb(scrn);
                 i830_free_memory(scrn, intel->front_buffer);
                 intel->front_buffer = NULL;
         }