Support new CRTC/Output prepare/commit hooks.

New hooks replace explicit invocation of DPMS functions to manage mode
setting sequencing.

src/i830_crt.c

@@ -341,7 +341,9 @@ static const xf86OutputFuncsRec i830_crt_output_funcs = {
     .restore = i830_crt_restore,
     .mode_valid = i830_crt_mode_valid,
     .mode_fixup = i830_crt_mode_fixup,
+    .prepare = i830_output_prepare,
     .mode_set = i830_crt_mode_set,
+    .commit = i830_output_commit,
     .detect = i830_crt_detect,
     .get_modes = i830_ddc_get_modes,
     .destroy = i830_crt_destroy

src/i830_display.c

@@ -613,6 +613,30 @@ i830_crtc_unlock (xf86CrtcPtr crtc)
 #endif
 }
 
+static void
+i830_crtc_prepare (xf86CrtcPtr crtc)
+{
+    crtc->funcs->dpms (crtc, DPMSModeOff);
+}
+
+static void
+i830_crtc_commit (xf86CrtcPtr crtc)
+{
+    crtc->funcs->dpms (crtc, DPMSModeOn);
+}
+
+void
+i830_output_prepare (xf86OutputPtr output)
+{
+    output->funcs->dpms (output, DPMSModeOff);
+}
+
+void
+i830_output_commit (xf86OutputPtr output)
+{
+    output->funcs->dpms (output, DPMSModeOn);
+}
+
 static Bool
 i830_crtc_mode_fixup(xf86CrtcPtr crtc, DisplayModePtr mode,
 		     DisplayModePtr adjusted_mode)
@@ -1377,7 +1401,9 @@ static const xf86CrtcFuncsRec i830_crtc_funcs = {
     .lock = i830_crtc_lock,
     .unlock = i830_crtc_unlock,
     .mode_fixup = i830_crtc_mode_fixup,
+    .prepare = i830_crtc_prepare,
     .mode_set = i830_crtc_mode_set,
+    .commit = i830_crtc_commit,
     .gamma_set = i830_crtc_gamma_set,
     .shadow_create = i830_crtc_shadow_create,
     .shadow_allocate = i830_crtc_shadow_allocate,

src/i830_display.h

@@ -40,3 +40,6 @@ void i830ReleaseLoadDetectPipe(xf86OutputPtr output);
 void i830_crtc_init(ScrnInfoPtr pScrn, int pipe);
 void i830_crtc_load_lut(xf86CrtcPtr crtc);
 DisplayModePtr i830_crtc_mode_get(ScrnInfoPtr pScrn, xf86CrtcPtr crtc);
+void i830_output_prepare (xf86OutputPtr output);
+void i830_output_commit (xf86OutputPtr output);
+

src/i830_dvo.c

@@ -31,6 +31,7 @@ USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include "xf86.h"
 #include "i830.h"
+#include "i830_display.h"
 #include "i810_reg.h"
 
 #include "sil164/sil164.h"
@@ -226,7 +227,9 @@ static const xf86OutputFuncsRec i830_dvo_output_funcs = {
     .restore = i830_dvo_restore,
     .mode_valid = i830_dvo_mode_valid,
     .mode_fixup = i830_dvo_mode_fixup,
+    .prepare = i830_output_prepare,
     .mode_set = i830_dvo_mode_set,
+    .commit = i830_output_commit,
     .detect = i830_dvo_detect,
     .get_modes = i830_ddc_get_modes,
     .destroy = i830_dvo_destroy

src/i830_lvds.c

@@ -392,7 +392,9 @@ static const xf86OutputFuncsRec i830_lvds_output_funcs = {
     .restore = i830_lvds_restore,
     .mode_valid = i830_lvds_mode_valid,
     .mode_fixup = i830_lvds_mode_fixup,
+    .prepare = i830_output_prepare,
     .mode_set = i830_lvds_mode_set,
+    .commit = i830_output_commit,
     .detect = i830_lvds_detect,
     .get_modes = i830_lvds_get_modes,
 #ifdef RANDR_12_INTERFACE

src/i830_sdvo.c

@@ -1060,7 +1060,9 @@ static const xf86OutputFuncsRec i830_sdvo_output_funcs = {
     .restore = i830_sdvo_restore,
     .mode_valid = i830_sdvo_mode_valid,
     .mode_fixup = i830_sdvo_mode_fixup,
+    .prepare = i830_output_prepare,
     .mode_set = i830_sdvo_mode_set,
+    .commit = i830_output_commit,
     .detect = i830_sdvo_detect,
     .get_modes = i830_sdvo_get_modes,
     .destroy = i830_sdvo_destroy

src/i830_tv.c

@@ -1406,7 +1406,9 @@ static const xf86OutputFuncsRec i830_tv_output_funcs = {
     .restore = i830_tv_restore,
     .mode_valid = i830_tv_mode_valid,
     .mode_fixup = i830_tv_mode_fixup,
+    .prepare = i830_output_prepare,
     .mode_set = i830_tv_mode_set,
+    .commit = i830_output_commit,
     .detect = i830_tv_detect,
     .get_modes = i830_tv_get_modes,
     .destroy = i830_tv_destroy