[PATCH 3/5] Defer initial modeset until the first BlockHandler invocation

[Michel Dänzer]

From: Michel Dänzer <michel.daenzer at amd.com>

This ensures that the screen pixmap contents have been initialized when
the initial modes are set.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=27757
Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
---
 src/drmmode_display.c | 44 ++++++++++++++------------------------------
 src/drmmode_display.h |  3 ++-
 src/radeon_kms.c      | 17 ++++++++++++++---
 3 files changed, 30 insertions(+), 34 deletions(-)

diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 76b2577..064a64c 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -395,8 +395,6 @@ void drmmode_copy_fb(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
 	ScreenPtr pScreen = pScrn->pScreen;
 	int fbcon_id = 0;
 	int i;
-	int pitch;
-	uint32_t tiling_flags = 0;
 	Bool ret;
 
 	for (i = 0; i < xf86_config->num_crtc; i++) {
@@ -422,28 +420,7 @@ void drmmode_copy_fb(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
 	if (!src)
 		return;
 
-	if (info->allowColorTiling) {
-		if (info->ChipFamily >= CHIP_FAMILY_R600) {
-			if (info->allowColorTiling2D) {
-				tiling_flags |= RADEON_TILING_MACRO;
-			} else {
-				tiling_flags |= RADEON_TILING_MICRO;
-			}
-		} else
-			tiling_flags |= RADEON_TILING_MACRO;
-	}
-
-	pitch = RADEON_ALIGN(pScrn->displayWidth,
-			     drmmode_get_pitch_align(pScrn, info->pixel_bytes, tiling_flags)) *
-		info->pixel_bytes;
-
-	dst = drmmode_create_bo_pixmap(pScrn, pScrn->virtualX,
-				       pScrn->virtualY, pScrn->depth,
-				       pScrn->bitsPerPixel, pitch,
-				       tiling_flags, info->front_bo, &info->front_surface);
-	if (!dst)
-		goto out_free_src;
-
+	dst = pScreen->GetScreenPixmap(pScreen);
 	ret = info->accel_state->exa->PrepareCopy (src, dst,
 						   -1, -1, GXcopy, FB_ALLONES);
 	if (!ret)
@@ -454,7 +431,6 @@ void drmmode_copy_fb(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
 	radeon_cs_flush_indirect(pScrn);
 
 	pScreen->canDoBGNoneRoot = TRUE;
-	drmmode_destroy_bo_pixmap(dst);
  out_free_src:
 	drmmode_destroy_bo_pixmap(src);
 	return;
@@ -2109,7 +2085,8 @@ void drmmode_adjust_frame(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int x, int y)
 	}
 }
 
-Bool drmmode_set_desired_modes(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
+Bool drmmode_set_desired_modes(ScrnInfoPtr pScrn, drmmode_ptr drmmode,
+			       Bool set_hw)
 {
 	xf86CrtcConfigPtr   config = XF86_CRTC_CONFIG_PTR(pScrn);
 	int c;
@@ -2121,7 +2098,7 @@ Bool drmmode_set_desired_modes(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
 		int		o;
 
 		/* Skip disabled CRTCs */
-		if (!crtc->enabled) {
+		if (set_hw && !crtc->enabled) {
 			drmmode_do_crtc_dpms(crtc, DPMSModeOff);
 			drmModeSetCrtc(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id,
 				       0, 0, 0, NULL, 0, NULL);
@@ -2157,9 +2134,16 @@ Bool drmmode_set_desired_modes(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
 			crtc->desiredY = 0;
 		}
 
-		if (!crtc->funcs->set_mode_major(crtc, &crtc->desiredMode, crtc->desiredRotation,
-						 crtc->desiredX, crtc->desiredY))
-			return FALSE;
+		if (set_hw) {
+			if (!crtc->funcs->set_mode_major(crtc, &crtc->desiredMode, crtc->desiredRotation,
+							 crtc->desiredX, crtc->desiredY))
+				return FALSE;
+		} else {
+			crtc->mode = crtc->desiredMode;
+			crtc->rotation = crtc->desiredRotation;
+			crtc->x = crtc->desiredX;
+			crtc->y = crtc->desiredY;
+		}
 	}
 	return TRUE;
 }
diff --git a/src/drmmode_display.h b/src/drmmode_display.h
index 49b02d6..2fdd3e0 100644
--- a/src/drmmode_display.h
+++ b/src/drmmode_display.h
@@ -126,7 +126,8 @@ extern void drmmode_fini(ScrnInfoPtr pScrn, drmmode_ptr drmmode);
 extern Bool drmmode_set_bufmgr(ScrnInfoPtr pScrn, drmmode_ptr drmmode, struct radeon_bo_manager *bufmgr);
 extern void drmmode_set_cursor(ScrnInfoPtr scrn, drmmode_ptr drmmode, int id, struct radeon_bo *bo);
 void drmmode_adjust_frame(ScrnInfoPtr pScrn, drmmode_ptr drmmode, int x, int y);
-extern Bool drmmode_set_desired_modes(ScrnInfoPtr pScrn, drmmode_ptr drmmode);
+extern Bool drmmode_set_desired_modes(ScrnInfoPtr pScrn, drmmode_ptr drmmode,
+				      Bool set_hw);
 #if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) >= 10
 extern void drmmode_copy_fb(ScrnInfoPtr pScrn, drmmode_ptr drmmode);
 #endif
diff --git a/src/radeon_kms.c b/src/radeon_kms.c
index 2a84ff6..eda3f33 100644
--- a/src/radeon_kms.c
+++ b/src/radeon_kms.c
@@ -245,7 +245,7 @@ static Bool RADEONCreateScreenResources_KMS(ScreenPtr pScreen)
 	return FALSE;
     pScreen->CreateScreenResources = RADEONCreateScreenResources_KMS;
 
-    if (!drmmode_set_desired_modes(pScrn, &info->drmmode))
+    if (!drmmode_set_desired_modes(pScrn, &info->drmmode, FALSE))
 	return FALSE;
 
     drmmode_uevent_init(pScrn, &info->drmmode);
@@ -535,6 +535,17 @@ static void RADEONBlockHandler_KMS(BLOCKHANDLER_ARGS_DECL)
 #endif
 }
 
+static void RADEONBlockHandler_oneshot(BLOCKHANDLER_ARGS_DECL)
+{
+    SCREEN_PTR(arg);
+    ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
+    RADEONInfoPtr info = RADEONPTR(pScrn);
+
+    drmmode_set_desired_modes(pScrn, &info->drmmode, TRUE);
+
+    RADEONBlockHandler_KMS(BLOCKHANDLER_ARGS);
+}
+
 static void
 radeon_flush_callback(CallbackListPtr *list,
 		      pointer user_data, pointer call_data)
@@ -1707,7 +1718,7 @@ Bool RADEONScreenInit_KMS(SCREEN_INIT_ARGS_DECL)
     pScreen->CloseScreen = RADEONCloseScreen_KMS;
     pScreen->SaveScreen  = RADEONSaveScreen_KMS;
     info->BlockHandler = pScreen->BlockHandler;
-    pScreen->BlockHandler = RADEONBlockHandler_KMS;
+    pScreen->BlockHandler = RADEONBlockHandler_oneshot;
 
     if (!AddCallback(&FlushCallback, radeon_flush_callback, pScrn))
         return FALSE;
@@ -1765,7 +1776,7 @@ Bool RADEONEnterVT_KMS(VT_FUNC_ARGS_DECL)
 	drmmode_copy_fb(pScrn, &info->drmmode);
 #endif
 
-    if (!drmmode_set_desired_modes(pScrn, &info->drmmode))
+    if (!drmmode_set_desired_modes(pScrn, &info->drmmode, TRUE))
 	return FALSE;
 
     return TRUE;
-- 
2.1.4