linux-kernel - [PATCH 3/6] drm/qxl: track primary bo

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Message-Id: <20181128103418.28023-4-kraxel@redhat.com>
Date:   Wed, 28 Nov 2018 11:34:15 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     David Airlie <airlied@...hat.com>, dri-devel@...ts.freedesktop.org
Cc:     Gerd Hoffmann <kraxel@...hat.com>, David Airlie <airlied@...ux.ie>,
        virtualization@...ts.linux-foundation.org (open list:DRM DRIVER FOR QXL
        VIRTUAL GPU), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 3/6] drm/qxl: track primary bo

Track which bo is used as primary surface.  With that in place we don't
need the primary_created flag any more, we can just check the primary bo
pointer instead.

Also verify we don't already have a primary surface in
qxl_io_create_primary().

Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 drivers/gpu/drm/qxl/qxl_drv.h     | 2 +-
 drivers/gpu/drm/qxl/qxl_cmd.c     | 7 +++++--
 drivers/gpu/drm/qxl/qxl_display.c | 2 +-
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/qxl/qxl_drv.h b/drivers/gpu/drm/qxl/qxl_drv.h
index 6b8d28a23f..92140e0d71 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.h
+++ b/drivers/gpu/drm/qxl/qxl_drv.h
@@ -229,7 +229,7 @@ struct qxl_device {
 
 	struct qxl_ram_header *ram_header;
 
-	unsigned int primary_created:1;
+	struct qxl_bo *primary_bo;
 
 	struct qxl_memslot	*mem_slots;
 	uint8_t		n_mem_slots;
diff --git a/drivers/gpu/drm/qxl/qxl_cmd.c b/drivers/gpu/drm/qxl/qxl_cmd.c
index f263d83775..3c606f0f7a 100644
--- a/drivers/gpu/drm/qxl/qxl_cmd.c
+++ b/drivers/gpu/drm/qxl/qxl_cmd.c
@@ -372,13 +372,16 @@ void qxl_io_flush_surfaces(struct qxl_device *qdev)
 void qxl_io_destroy_primary(struct qxl_device *qdev)
 {
 	wait_for_io_cmd(qdev, 0, QXL_IO_DESTROY_PRIMARY_ASYNC);
-	qdev->primary_created = false;
+	qdev->primary_bo = NULL;
 }
 
 void qxl_io_create_primary(struct qxl_device *qdev, struct qxl_bo *bo)
 {
 	struct qxl_surface_create *create;
 
+	if (WARN_ON(qdev->primary_bo))
+		return;
+
 	DRM_DEBUG_DRIVER("qdev %p, ram_header %p\n", qdev, qdev->ram_header);
 	create = &qdev->ram_header->create_surface;
 	create->format = bo->surf.format;
@@ -397,7 +400,7 @@ void qxl_io_create_primary(struct qxl_device *qdev, struct qxl_bo *bo)
 	create->type = QXL_SURF_TYPE_PRIMARY;
 
 	wait_for_io_cmd(qdev, 0, QXL_IO_CREATE_PRIMARY_ASYNC);
-	qdev->primary_created = true;
+	qdev->primary_bo = bo;
 }
 
 void qxl_io_memslot_add(struct qxl_device *qdev, uint8_t id)
diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
index d875cae02f..69b180735d 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -302,7 +302,7 @@ static void qxl_crtc_update_monitors_config(struct drm_crtc *crtc,
 	struct qxl_head head;
 	int oldcount, i = qcrtc->index;
 
-	if (!qdev->primary_created) {
+	if (!qdev->primary_bo) {
 		DRM_DEBUG_KMS("no primary surface, skip (%s)\n", reason);
 		return;
 	}
-- 
2.9.3