[RFC 10/21] drm/qxl: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja <architt@codeaurora.org>]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

The code relying on DEFERRED_IO can't be stubbed out using drm_fb_helper
functions. This is because the deferred io members in fbdev core structs
are defined based on whether FB_DEFERRED_IO is defined or not.

For now, wrap around deferred io code with an #ifdef check for
CONFIG_DEFERRED_IO. We could consider creating stub fb helper functions
here, but this would require some changes in the core fbdev structs.

Cc: David Airlie <airlied@linux.ie>
Cc: Frediano Ziglio <fziglio@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/qxl/Kconfig  | 5 -----
 drivers/gpu/drm/qxl/qxl_fb.c | 4 ++++
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/qxl/Kconfig b/drivers/gpu/drm/qxl/Kconfig
index 38c2bb7..da45b11 100644
--- a/drivers/gpu/drm/qxl/Kconfig
+++ b/drivers/gpu/drm/qxl/Kconfig
@@ -1,12 +1,7 @@
 config DRM_QXL
 	tristate "QXL virtual GPU"
 	depends on DRM && PCI
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
-	select FB_DEFERRED_IO
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_TTM
 	select CRC32
 	help
diff --git a/drivers/gpu/drm/qxl/qxl_fb.c b/drivers/gpu/drm/qxl/qxl_fb.c
index 41c422f..9391dfe 100644
--- a/drivers/gpu/drm/qxl/qxl_fb.c
+++ b/drivers/gpu/drm/qxl/qxl_fb.c
@@ -163,6 +163,7 @@ static void qxl_dirty_update(struct qxl_fbdev *qfbdev,
 	schedule_work(&qdev->fb_work);
 }
 
+#ifdef CONFIG_FB_DEFERRED_IO
 static void qxl_deferred_io(struct fb_info *info,
 			    struct list_head *pagelist)
 {
@@ -191,6 +192,7 @@ static struct fb_deferred_io qxl_defio = {
 	.delay		= QXL_DIRTY_DELAY,
 	.deferred_io	= qxl_deferred_io,
 };
+#endif
 
 static void qxl_fb_fillrect(struct fb_info *info,
 			    const struct fb_fillrect *rect)
@@ -420,8 +422,10 @@ static int qxlfb_create(struct qxl_fbdev *qfbdev,
 		goto out_destroy_fbi;
 	}
 
+#ifdef CONFIG_FB_DEFERRED_IO
 	info->fbdefio = &qxl_defio;
 	fb_deferred_io_init(info);
+#endif
 
 	qdev->fbdev_info = info;
 	qdev->fbdev_qfb = &qfbdev->qfb;
-- 
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