linux-kernel - [PATCH 1/2] fbdev/hyperv_fb: deprecate this in favor of Hyper-V DRM driver

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Message-Id: <1758117785-20653-1-git-send-email-ptsm@linux.microsoft.com>
Date: Wed, 17 Sep 2025 07:03:05 -0700
From: Prasanna Kumar T S M <ptsm@...ux.microsoft.com>
To: dri-devel@...ts.freedesktop.org,
	linux-hyperv@...r.kernel.org,
	linux-fbdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	ssengar@...ux.microsoft.com,
	mhklinux@...look.com,
	ptsm@...ux.microsoft.com,
	rdunlap@...radead.org,
	bartosz.golaszewski@...aro.org,
	gonzalo.silvalde@...il.com,
	arnd@...db.de,
	tzimmermann@...e.de,
	decui@...rosoft.com,
	wei.liu@...nel.org,
	deller@....de,
	kys@...rosoft.com,
	haiyangz@...rosoft.com
Subject: [PATCH 1/2] fbdev/hyperv_fb: deprecate this in favor of Hyper-V DRM driver

The Hyper-V DRM driver is available since kernel version 5.14 and it
provides full KMS support and fbdev emulation via the DRM fbdev helpers.
Deprecate this driver in favor of Hyper-V DRM driver.

Signed-off-by: Prasanna Kumar T S M <ptsm@...ux.microsoft.com>
---
 drivers/video/fbdev/Kconfig     | 5 ++++-
 drivers/video/fbdev/hyperv_fb.c | 2 ++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig
index c21484d15f0c..48c1c7417f6d 100644
--- a/drivers/video/fbdev/Kconfig
+++ b/drivers/video/fbdev/Kconfig
@@ -1773,13 +1773,16 @@ config FB_BROADSHEET
 	  a bridge adapter.
 
 config FB_HYPERV
-	tristate "Microsoft Hyper-V Synthetic Video support"
+	tristate "Microsoft Hyper-V Synthetic Video support (DEPRECATED)"
 	depends on FB && HYPERV
 	select DMA_CMA if HAVE_DMA_CONTIGUOUS && CMA
 	select FB_IOMEM_HELPERS_DEFERRED
 	help
 	  This framebuffer driver supports Microsoft Hyper-V Synthetic Video.
 
+	  This driver is deprecated, please use the Hyper-V DRM driver at
+	  drivers/gpu/drm/hyperv (CONFIG_DRM_HYPERV) instead.
+
 config FB_SIMPLE
 	tristate "Simple framebuffer support"
 	depends on FB
diff --git a/drivers/video/fbdev/hyperv_fb.c b/drivers/video/fbdev/hyperv_fb.c
index 75338ffc703f..c99e2ea4b3de 100644
--- a/drivers/video/fbdev/hyperv_fb.c
+++ b/drivers/video/fbdev/hyperv_fb.c
@@ -1357,6 +1357,8 @@ static int __init hvfb_drv_init(void)
 {
 	int ret;
 
+	pr_warn("Deprecated: use Hyper-V DRM driver instead\n");
+
 	if (fb_modesetting_disabled("hyper_fb"))
 		return -ENODEV;
 
-- 
2.49.0