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Javier Martinez Canillas

2021-Nov-03 12:28 UTC

[Nouveau] [RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

The "nomodeset" kernel cmdline parameter is handled by the vgacon
driver
but the exported vgacon_text_force() symbol is only used by DRM drivers.

It makes much more sense for the parameter logic to be in the subsystem
of the drivers that are making use of it. Let's move that to DRM.

Suggested-by: Daniel Vetter <daniel.vetter at ffwll.ch>
Signed-off-by: Javier Martinez Canillas <javierm at redhat.com>
---

 drivers/gpu/drm/Makefile                |  2 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +--
 drivers/gpu/drm/ast/ast_drv.c           |  1 -
 drivers/gpu/drm/drm_nomodeset.c         | 26 +++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_module.c      |  2 --
 drivers/gpu/drm/mgag200/mgag200_drv.c   |  1 -
 drivers/gpu/drm/nouveau/nouveau_drm.c   |  1 -
 drivers/gpu/drm/qxl/qxl_drv.c           |  1 -
 drivers/gpu/drm/radeon/radeon_drv.c     |  1 -
 drivers/gpu/drm/tiny/bochs.c            |  1 -
 drivers/gpu/drm/tiny/cirrus.c           |  1 -
 drivers/gpu/drm/vboxvideo/vbox_drv.c    |  1 -
 drivers/gpu/drm/virtio/virtgpu_drv.c    |  1 -
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c     |  1 -
 drivers/video/console/vgacon.c          | 21 --------------------
 include/drm/drm_mode_config.h           |  6 ++++++
 include/linux/console.h                 |  6 ------
 17 files changed, 35 insertions(+), 41 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_nomodeset.c

diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 1c41156deb5f..0e2d60ea93ca 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -33,6 +33,8 @@ drm-$(CONFIG_DRM_PRIVACY_SCREEN) += drm_privacy_screen.o
drm_privacy_screen_x86.
 
 obj-$(CONFIG_DRM_DP_AUX_BUS) += drm_dp_aux_bus.o
 
+obj-y += drm_nomodeset.o
+
 drm_cma_helper-y := drm_gem_cma_helper.o
 obj-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_cma_helper.o
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index c718fb5f3f8a..2680a2aaa877 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -31,7 +31,6 @@
 #include "amdgpu_drv.h"
 
 #include <drm/drm_pciids.h>
-#include <linux/console.h>
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <linux/vga_switcheroo.h>
@@ -2515,7 +2514,7 @@ static int __init amdgpu_init(void)
 	int r;
 
 	if (vgacon_text_force()) {
-		DRM_ERROR("VGACON disables amdgpu kernel modesetting.\n");
+		DRM_ERROR("amdgpu kernel modesetting disabled.\n");
 		return -EINVAL;
 	}
 
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index 86d5cd7b6318..048be607b182 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -26,7 +26,6 @@
  * Authors: Dave Airlie <airlied at redhat.com>
  */
 
-#include <linux/console.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 
diff --git a/drivers/gpu/drm/drm_nomodeset.c b/drivers/gpu/drm/drm_nomodeset.c
new file mode 100644
index 000000000000..1ac9a8d5a8fe
--- /dev/null
+++ b/drivers/gpu/drm/drm_nomodeset.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/module.h>
+#include <linux/types.h>
+
+static bool vgacon_text_mode_force;
+
+bool vgacon_text_force(void)
+{
+	return vgacon_text_mode_force;
+}
+EXPORT_SYMBOL(vgacon_text_force);
+
+static int __init text_mode(char *str)
+{
+	vgacon_text_mode_force = true;
+
+	pr_warn("You have booted with nomodeset. This means your GPU drivers are
DISABLED\n");
+	pr_warn("Any video related functionality will be severely degraded, and
you may not even be able to suspend the system properly\n");
+	pr_warn("Unless you actually understand what nomodeset does, you should
reboot without enabling it\n");
+
+	return 1;
+}
+
+/* force text mode - used by kernel modesetting */
+__setup("nomodeset", text_mode);
diff --git a/drivers/gpu/drm/i915/i915_module.c
b/drivers/gpu/drm/i915/i915_module.c
index c7507266aa83..14a59226519d 100644
--- a/drivers/gpu/drm/i915/i915_module.c
+++ b/drivers/gpu/drm/i915/i915_module.c
@@ -4,8 +4,6 @@
  * Copyright ? 2021 Intel Corporation
  */
 
-#include <linux/console.h>
-
 #include "gem/i915_gem_context.h"
 #include "gem/i915_gem_object.h"
 #include "i915_active.h"
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c
b/drivers/gpu/drm/mgag200/mgag200_drv.c
index 6b9243713b3c..685e766db6a4 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.c
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
@@ -6,7 +6,6 @@
  *          Dave Airlie
  */
 
-#include <linux/console.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/vmalloc.h>
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c
b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 1f828c9f691c..029997f50d1a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -22,7 +22,6 @@
  * Authors: Ben Skeggs
  */
 
-#include <linux/console.h>
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/pci.h>
diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
index fc47b0deb021..3cd6bd9f059d 100644
--- a/drivers/gpu/drm/qxl/qxl_drv.c
+++ b/drivers/gpu/drm/qxl/qxl_drv.c
@@ -29,7 +29,6 @@
 
 #include "qxl_drv.h"
 
-#include <linux/console.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/vgaarb.h>
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c
b/drivers/gpu/drm/radeon/radeon_drv.c
index b74cebca1f89..9b606c1b11ec 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -31,7 +31,6 @@
 
 
 #include <linux/compat.h>
-#include <linux/console.h>
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <linux/vga_switcheroo.h>
diff --git a/drivers/gpu/drm/tiny/bochs.c b/drivers/gpu/drm/tiny/bochs.c
index 2ce3bd903b70..04333f78be55 100644
--- a/drivers/gpu/drm/tiny/bochs.c
+++ b/drivers/gpu/drm/tiny/bochs.c
@@ -1,6 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include <linux/console.h>
 #include <linux/pci.h>
 
 #include <drm/drm_aperture.h>
diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c
index 4611ec408506..8bd674f0d682 100644
--- a/drivers/gpu/drm/tiny/cirrus.c
+++ b/drivers/gpu/drm/tiny/cirrus.c
@@ -16,7 +16,6 @@
  * Copyright 1999-2001 Jeff Garzik <jgarzik at pobox.com>
  */
 
-#include <linux/console.h>
 #include <linux/dma-buf-map.h>
 #include <linux/module.h>
 #include <linux/pci.h>
diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c
b/drivers/gpu/drm/vboxvideo/vbox_drv.c
index a6c81af37345..e6d983121d0b 100644
--- a/drivers/gpu/drm/vboxvideo/vbox_drv.c
+++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c
@@ -7,7 +7,6 @@
  *          Michael Thayer <michael.thayer at oracle.com,
  *          Hans de Goede <hdegoede at redhat.com>
  */
-#include <linux/console.h>
 #include <linux/module.h>
 #include <linux/pci.h>
 #include <linux/vt_kern.h>
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c
b/drivers/gpu/drm/virtio/virtgpu_drv.c
index 749db18dcfa2..cd4c170236f1 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
@@ -27,7 +27,6 @@
  */
 
 #include <linux/module.h>
-#include <linux/console.h>
 #include <linux/pci.h>
 #include <linux/poll.h>
 #include <linux/wait.h>
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index ab9a1750e1df..fcc4b5a7f639 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -25,7 +25,6 @@
  *
  **************************************************************************/
 
-#include <linux/console.h>
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/pci.h>
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index ef9c57ce0906..d4320b147956 100644
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -97,30 +97,9 @@ static int 		vga_video_font_height;
 static int 		vga_scan_lines		__read_mostly;
 static unsigned int 	vga_rolled_over; /* last vc_origin offset before wrap */
 
-static bool vgacon_text_mode_force;
 static bool vga_hardscroll_enabled;
 static bool vga_hardscroll_user_enable = true;
 
-bool vgacon_text_force(void)
-{
-	return vgacon_text_mode_force;
-}
-EXPORT_SYMBOL(vgacon_text_force);
-
-static int __init text_mode(char *str)
-{
-	vgacon_text_mode_force = true;
-
-	pr_warn("You have booted with nomodeset. This means your GPU drivers are
DISABLED\n");
-	pr_warn("Any video related functionality will be severely degraded, and
you may not even be able to suspend the system properly\n");
-	pr_warn("Unless you actually understand what nomodeset does, you should
reboot without enabling it\n");
-
-	return 1;
-}
-
-/* force text mode - used by kernel modesetting */
-__setup("nomodeset", text_mode);
-
 static int __init no_scroll(char *str)
 {
 	/*
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 48b7de80daf5..e1d2042a7b77 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -969,4 +969,10 @@ static inline int drm_mode_config_init(struct drm_device
*dev)
 void drm_mode_config_reset(struct drm_device *dev);
 void drm_mode_config_cleanup(struct drm_device *dev);
 
+#ifdef CONFIG_VGA_CONSOLE
+extern bool vgacon_text_force(void);
+#else
+static inline bool vgacon_text_force(void) { return false; }
+#endif
+
 #endif
diff --git a/include/linux/console.h b/include/linux/console.h
index 20874db50bc8..d4dd8384898b 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -217,12 +217,6 @@ extern atomic_t ignore_console_lock_warning;
 #define VESA_HSYNC_SUSPEND      2
 #define VESA_POWERDOWN          3
 
-#ifdef CONFIG_VGA_CONSOLE
-extern bool vgacon_text_force(void);
-#else
-static inline bool vgacon_text_force(void) { return false; }
-#endif
-
 extern void console_init(void);
 
 /* For deferred console takeover */
-- 
2.33.1

Thomas Zimmermann

2021-Nov-03 12:41 UTC

head link

[RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

Hi

Am 03.11.21 um 13:28 schrieb Javier Martinez Canillas:> The "nomodeset" kernel cmdline parameter is handled by the vgacon
driver
> but the exported vgacon_text_force() symbol is only used by DRM drivers.
> 
> It makes much more sense for the parameter logic to be in the subsystem
> of the drivers that are making use of it. Let's move that to DRM.
> 
> Suggested-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> Signed-off-by: Javier Martinez Canillas <javierm at redhat.com>
> ---
> 
>   drivers/gpu/drm/Makefile                |  2 ++
>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +--
>   drivers/gpu/drm/ast/ast_drv.c           |  1 -
>   drivers/gpu/drm/drm_nomodeset.c         | 26 +++++++++++++++++++++++++
>   drivers/gpu/drm/i915/i915_module.c      |  2 --
>   drivers/gpu/drm/mgag200/mgag200_drv.c   |  1 -
>   drivers/gpu/drm/nouveau/nouveau_drm.c   |  1 -
>   drivers/gpu/drm/qxl/qxl_drv.c           |  1 -
>   drivers/gpu/drm/radeon/radeon_drv.c     |  1 -
>   drivers/gpu/drm/tiny/bochs.c            |  1 -
>   drivers/gpu/drm/tiny/cirrus.c           |  1 -
>   drivers/gpu/drm/vboxvideo/vbox_drv.c    |  1 -
>   drivers/gpu/drm/virtio/virtgpu_drv.c    |  1 -
>   drivers/gpu/drm/vmwgfx/vmwgfx_drv.c     |  1 -
>   drivers/video/console/vgacon.c          | 21 --------------------
>   include/drm/drm_mode_config.h           |  6 ++++++
>   include/linux/console.h                 |  6 ------
>   17 files changed, 35 insertions(+), 41 deletions(-)
>   create mode 100644 drivers/gpu/drm/drm_nomodeset.c
> 
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index 1c41156deb5f..0e2d60ea93ca 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -33,6 +33,8 @@ drm-$(CONFIG_DRM_PRIVACY_SCREEN) += drm_privacy_screen.o
drm_privacy_screen_x86.
>   
>   obj-$(CONFIG_DRM_DP_AUX_BUS) += drm_dp_aux_bus.o
>   
> +obj-y += drm_nomodeset.o
Repeating my other comment, should this rather be protected by a 
separate config symbol that is selected by CONFIG_DRM?

Best regards
Thomas
> +
>   drm_cma_helper-y := drm_gem_cma_helper.o
>   obj-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_cma_helper.o
>   
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index c718fb5f3f8a..2680a2aaa877 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -31,7 +31,6 @@
>   #include "amdgpu_drv.h"
>   
>   #include <drm/drm_pciids.h>
> -#include <linux/console.h>
>   #include <linux/module.h>
>   #include <linux/pm_runtime.h>
>   #include <linux/vga_switcheroo.h>
> @@ -2515,7 +2514,7 @@ static int __init amdgpu_init(void)
>   	int r;
>   
>   	if (vgacon_text_force()) {
> -		DRM_ERROR("VGACON disables amdgpu kernel modesetting.\n");
> +		DRM_ERROR("amdgpu kernel modesetting disabled.\n");
>   		return -EINVAL;
>   	}
>   
> diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
> index 86d5cd7b6318..048be607b182 100644
> --- a/drivers/gpu/drm/ast/ast_drv.c
> +++ b/drivers/gpu/drm/ast/ast_drv.c
> @@ -26,7 +26,6 @@
>    * Authors: Dave Airlie <airlied at redhat.com>
>    */
>   
> -#include <linux/console.h>
>   #include <linux/module.h>
>   #include <linux/pci.h>
>   
> diff --git a/drivers/gpu/drm/drm_nomodeset.c
b/drivers/gpu/drm/drm_nomodeset.c
> new file mode 100644
> index 000000000000..1ac9a8d5a8fe
> --- /dev/null
> +++ b/drivers/gpu/drm/drm_nomodeset.c
> @@ -0,0 +1,26 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <linux/module.h>
> +#include <linux/types.h>
> +
> +static bool vgacon_text_mode_force;
> +
> +bool vgacon_text_force(void)
> +{
> +	return vgacon_text_mode_force;
> +}
> +EXPORT_SYMBOL(vgacon_text_force);
> +
> +static int __init text_mode(char *str)
> +{
> +	vgacon_text_mode_force = true;
> +
> +	pr_warn("You have booted with nomodeset. This means your GPU drivers
are DISABLED\n");
> +	pr_warn("Any video related functionality will be severely degraded,
and you may not even be able to suspend the system properly\n");
> +	pr_warn("Unless you actually understand what nomodeset does, you
should reboot without enabling it\n");
> +
> +	return 1;
> +}
> +
> +/* force text mode - used by kernel modesetting */
> +__setup("nomodeset", text_mode);
> diff --git a/drivers/gpu/drm/i915/i915_module.c
b/drivers/gpu/drm/i915/i915_module.c
> index c7507266aa83..14a59226519d 100644
> --- a/drivers/gpu/drm/i915/i915_module.c
> +++ b/drivers/gpu/drm/i915/i915_module.c
> @@ -4,8 +4,6 @@
>    * Copyright ? 2021 Intel Corporation
>    */
>   
> -#include <linux/console.h>
> -
>   #include "gem/i915_gem_context.h"
>   #include "gem/i915_gem_object.h"
>   #include "i915_active.h"
> diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c
b/drivers/gpu/drm/mgag200/mgag200_drv.c
> index 6b9243713b3c..685e766db6a4 100644
> --- a/drivers/gpu/drm/mgag200/mgag200_drv.c
> +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
> @@ -6,7 +6,6 @@
>    *          Dave Airlie
>    */
>   
> -#include <linux/console.h>
>   #include <linux/module.h>
>   #include <linux/pci.h>
>   #include <linux/vmalloc.h>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c
b/drivers/gpu/drm/nouveau/nouveau_drm.c
> index 1f828c9f691c..029997f50d1a 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_drm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
> @@ -22,7 +22,6 @@
>    * Authors: Ben Skeggs
>    */
>   
> -#include <linux/console.h>
>   #include <linux/delay.h>
>   #include <linux/module.h>
>   #include <linux/pci.h>
> diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
> index fc47b0deb021..3cd6bd9f059d 100644
> --- a/drivers/gpu/drm/qxl/qxl_drv.c
> +++ b/drivers/gpu/drm/qxl/qxl_drv.c
> @@ -29,7 +29,6 @@
>   
>   #include "qxl_drv.h"
>   
> -#include <linux/console.h>
>   #include <linux/module.h>
>   #include <linux/pci.h>
>   #include <linux/vgaarb.h>
> diff --git a/drivers/gpu/drm/radeon/radeon_drv.c
b/drivers/gpu/drm/radeon/radeon_drv.c
> index b74cebca1f89..9b606c1b11ec 100644
> --- a/drivers/gpu/drm/radeon/radeon_drv.c
> +++ b/drivers/gpu/drm/radeon/radeon_drv.c
> @@ -31,7 +31,6 @@
>   
>   
>   #include <linux/compat.h>
> -#include <linux/console.h>
>   #include <linux/module.h>
>   #include <linux/pm_runtime.h>
>   #include <linux/vga_switcheroo.h>
> diff --git a/drivers/gpu/drm/tiny/bochs.c b/drivers/gpu/drm/tiny/bochs.c
> index 2ce3bd903b70..04333f78be55 100644
> --- a/drivers/gpu/drm/tiny/bochs.c
> +++ b/drivers/gpu/drm/tiny/bochs.c
> @@ -1,6 +1,5 @@
>   // SPDX-License-Identifier: GPL-2.0-or-later
>   
> -#include <linux/console.h>
>   #include <linux/pci.h>
>   
>   #include <drm/drm_aperture.h>
> diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c
> index 4611ec408506..8bd674f0d682 100644
> --- a/drivers/gpu/drm/tiny/cirrus.c
> +++ b/drivers/gpu/drm/tiny/cirrus.c
> @@ -16,7 +16,6 @@
>    * Copyright 1999-2001 Jeff Garzik <jgarzik at pobox.com>
>    */
>   
> -#include <linux/console.h>
>   #include <linux/dma-buf-map.h>
>   #include <linux/module.h>
>   #include <linux/pci.h>
> diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c
b/drivers/gpu/drm/vboxvideo/vbox_drv.c
> index a6c81af37345..e6d983121d0b 100644
> --- a/drivers/gpu/drm/vboxvideo/vbox_drv.c
> +++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c
> @@ -7,7 +7,6 @@
>    *          Michael Thayer <michael.thayer at oracle.com,
>    *          Hans de Goede <hdegoede at redhat.com>
>    */
> -#include <linux/console.h>
>   #include <linux/module.h>
>   #include <linux/pci.h>
>   #include <linux/vt_kern.h>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c
b/drivers/gpu/drm/virtio/virtgpu_drv.c
> index 749db18dcfa2..cd4c170236f1 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_drv.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
> @@ -27,7 +27,6 @@
>    */
>   
>   #include <linux/module.h>
> -#include <linux/console.h>
>   #include <linux/pci.h>
>   #include <linux/poll.h>
>   #include <linux/wait.h>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> index ab9a1750e1df..fcc4b5a7f639 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> @@ -25,7 +25,6 @@
>    *
>   
**************************************************************************/
>   
> -#include <linux/console.h>
>   #include <linux/dma-mapping.h>
>   #include <linux/module.h>
>   #include <linux/pci.h>
> diff --git a/drivers/video/console/vgacon.c
b/drivers/video/console/vgacon.c
> index ef9c57ce0906..d4320b147956 100644
> --- a/drivers/video/console/vgacon.c
> +++ b/drivers/video/console/vgacon.c
> @@ -97,30 +97,9 @@ static int 		vga_video_font_height;
>   static int 		vga_scan_lines		__read_mostly;
>   static unsigned int 	vga_rolled_over; /* last vc_origin offset before
wrap */
>   
> -static bool vgacon_text_mode_force;
>   static bool vga_hardscroll_enabled;
>   static bool vga_hardscroll_user_enable = true;
>   
> -bool vgacon_text_force(void)
> -{
> -	return vgacon_text_mode_force;
> -}
> -EXPORT_SYMBOL(vgacon_text_force);
> -
> -static int __init text_mode(char *str)
> -{
> -	vgacon_text_mode_force = true;
> -
> -	pr_warn("You have booted with nomodeset. This means your GPU drivers
are DISABLED\n");
> -	pr_warn("Any video related functionality will be severely degraded,
and you may not even be able to suspend the system properly\n");
> -	pr_warn("Unless you actually understand what nomodeset does, you
should reboot without enabling it\n");
> -
> -	return 1;
> -}
> -
> -/* force text mode - used by kernel modesetting */
> -__setup("nomodeset", text_mode);
> -
>   static int __init no_scroll(char *str)
>   {
>   	/*
> diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
> index 48b7de80daf5..e1d2042a7b77 100644
> --- a/include/drm/drm_mode_config.h
> +++ b/include/drm/drm_mode_config.h
> @@ -969,4 +969,10 @@ static inline int drm_mode_config_init(struct
drm_device *dev)
>   void drm_mode_config_reset(struct drm_device *dev);
>   void drm_mode_config_cleanup(struct drm_device *dev);
>   
> +#ifdef CONFIG_VGA_CONSOLE
> +extern bool vgacon_text_force(void);
> +#else
> +static inline bool vgacon_text_force(void) { return false; }
> +#endif
> +
>   #endif
> diff --git a/include/linux/console.h b/include/linux/console.h
> index 20874db50bc8..d4dd8384898b 100644
> --- a/include/linux/console.h
> +++ b/include/linux/console.h
> @@ -217,12 +217,6 @@ extern atomic_t ignore_console_lock_warning;
>   #define VESA_HSYNC_SUSPEND      2
>   #define VESA_POWERDOWN          3
>   
> -#ifdef CONFIG_VGA_CONSOLE
> -extern bool vgacon_text_force(void);
> -#else
> -static inline bool vgacon_text_force(void) { return false; }
> -#endif
> -
>   extern void console_init(void);
>   
>   /* For deferred console takeover */
> 
-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 N?rnberg, Germany
(HRB 36809, AG N?rnberg)
Gesch?ftsf?hrer: Ivo Totev
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Jani Nikula

2021-Nov-03 12:56 UTC

head link

[RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

On Wed, 03 Nov 2021, Javier Martinez Canillas <javierm at redhat.com>
wrote:> The "nomodeset" kernel cmdline parameter is handled by the vgacon
driver
> but the exported vgacon_text_force() symbol is only used by DRM drivers.
>
> It makes much more sense for the parameter logic to be in the subsystem
> of the drivers that are making use of it. Let's move that to DRM.
>
> Suggested-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> Signed-off-by: Javier Martinez Canillas <javierm at redhat.com>
> ---
>
>  drivers/gpu/drm/Makefile                |  2 ++
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +--
>  drivers/gpu/drm/ast/ast_drv.c           |  1 -
>  drivers/gpu/drm/drm_nomodeset.c         | 26 +++++++++++++++++++++++++
>  drivers/gpu/drm/i915/i915_module.c      |  2 --
>  drivers/gpu/drm/mgag200/mgag200_drv.c   |  1 -
>  drivers/gpu/drm/nouveau/nouveau_drm.c   |  1 -
>  drivers/gpu/drm/qxl/qxl_drv.c           |  1 -
>  drivers/gpu/drm/radeon/radeon_drv.c     |  1 -
>  drivers/gpu/drm/tiny/bochs.c            |  1 -
>  drivers/gpu/drm/tiny/cirrus.c           |  1 -
>  drivers/gpu/drm/vboxvideo/vbox_drv.c    |  1 -
>  drivers/gpu/drm/virtio/virtgpu_drv.c    |  1 -
>  drivers/gpu/drm/vmwgfx/vmwgfx_drv.c     |  1 -
>  drivers/video/console/vgacon.c          | 21 --------------------
>  include/drm/drm_mode_config.h           |  6 ++++++
>  include/linux/console.h                 |  6 ------
>  17 files changed, 35 insertions(+), 41 deletions(-)
>  create mode 100644 drivers/gpu/drm/drm_nomodeset.c
>
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index 1c41156deb5f..0e2d60ea93ca 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -33,6 +33,8 @@ drm-$(CONFIG_DRM_PRIVACY_SCREEN) += drm_privacy_screen.o
drm_privacy_screen_x86.
>  
>  obj-$(CONFIG_DRM_DP_AUX_BUS) += drm_dp_aux_bus.o
>  
> +obj-y += drm_nomodeset.o
This is a subtle functional change. With this, you'll always have
__setup("nomodeset", text_mode) builtin and the parameter available.
And
using nomodeset will print out the pr_warn() splat from text_mode(). But
removing nomodeset will have no impact if CONFIG_VGA_CONSOLE=n as that
leads to vgacon_text_force() always returning false.

To not make functional changes, this should be:

obj-$(CONFIG_VGA_CONSOLE) += drm_nomodeset.o

Now, going with the cleanup in this series, maybe we should make the
functional change, and break the connection to CONFIG_VGA_CONSOLE
altogether, also in the header?

(Maybe we'll also need a proxy drm kconfig option to only have
drm_modeset.o builtin when CONFIG_DRM != n.)
> +
>  drm_cma_helper-y := drm_gem_cma_helper.o
>  obj-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_cma_helper.o
>  
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index c718fb5f3f8a..2680a2aaa877 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -31,7 +31,6 @@
>  #include "amdgpu_drv.h"
>  
>  #include <drm/drm_pciids.h>
> -#include <linux/console.h>
>  #include <linux/module.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/vga_switcheroo.h>
> @@ -2515,7 +2514,7 @@ static int __init amdgpu_init(void)
>  	int r;
>  
>  	if (vgacon_text_force()) {
> -		DRM_ERROR("VGACON disables amdgpu kernel modesetting.\n");
> +		DRM_ERROR("amdgpu kernel modesetting disabled.\n");
>  		return -EINVAL;
>  	}
>  
> diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
> index 86d5cd7b6318..048be607b182 100644
> --- a/drivers/gpu/drm/ast/ast_drv.c
> +++ b/drivers/gpu/drm/ast/ast_drv.c
> @@ -26,7 +26,6 @@
>   * Authors: Dave Airlie <airlied at redhat.com>
>   */
>  
> -#include <linux/console.h>
>  #include <linux/module.h>
>  #include <linux/pci.h>
>  
> diff --git a/drivers/gpu/drm/drm_nomodeset.c
b/drivers/gpu/drm/drm_nomodeset.c
> new file mode 100644
> index 000000000000..1ac9a8d5a8fe
> --- /dev/null
> +++ b/drivers/gpu/drm/drm_nomodeset.c
> @@ -0,0 +1,26 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <linux/module.h>
> +#include <linux/types.h>
> +
> +static bool vgacon_text_mode_force;
> +
> +bool vgacon_text_force(void)
> +{
> +	return vgacon_text_mode_force;
> +}
> +EXPORT_SYMBOL(vgacon_text_force);
> +
> +static int __init text_mode(char *str)
> +{
> +	vgacon_text_mode_force = true;
> +
> +	pr_warn("You have booted with nomodeset. This means your GPU drivers
are DISABLED\n");
> +	pr_warn("Any video related functionality will be severely degraded,
and you may not even be able to suspend the system properly\n");
> +	pr_warn("Unless you actually understand what nomodeset does, you
should reboot without enabling it\n");
> +
> +	return 1;
> +}
> +
> +/* force text mode - used by kernel modesetting */
> +__setup("nomodeset", text_mode);
> diff --git a/drivers/gpu/drm/i915/i915_module.c
b/drivers/gpu/drm/i915/i915_module.c
> index c7507266aa83..14a59226519d 100644
> --- a/drivers/gpu/drm/i915/i915_module.c
> +++ b/drivers/gpu/drm/i915/i915_module.c
> @@ -4,8 +4,6 @@
>   * Copyright ? 2021 Intel Corporation
>   */
>  
> -#include <linux/console.h>
> -
>  #include "gem/i915_gem_context.h"
>  #include "gem/i915_gem_object.h"
>  #include "i915_active.h"
> diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c
b/drivers/gpu/drm/mgag200/mgag200_drv.c
> index 6b9243713b3c..685e766db6a4 100644
> --- a/drivers/gpu/drm/mgag200/mgag200_drv.c
> +++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
> @@ -6,7 +6,6 @@
>   *          Dave Airlie
>   */
>  
> -#include <linux/console.h>
>  #include <linux/module.h>
>  #include <linux/pci.h>
>  #include <linux/vmalloc.h>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c
b/drivers/gpu/drm/nouveau/nouveau_drm.c
> index 1f828c9f691c..029997f50d1a 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_drm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
> @@ -22,7 +22,6 @@
>   * Authors: Ben Skeggs
>   */
>  
> -#include <linux/console.h>
>  #include <linux/delay.h>
>  #include <linux/module.h>
>  #include <linux/pci.h>
> diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
> index fc47b0deb021..3cd6bd9f059d 100644
> --- a/drivers/gpu/drm/qxl/qxl_drv.c
> +++ b/drivers/gpu/drm/qxl/qxl_drv.c
> @@ -29,7 +29,6 @@
>  
>  #include "qxl_drv.h"
>  
> -#include <linux/console.h>
>  #include <linux/module.h>
>  #include <linux/pci.h>
>  #include <linux/vgaarb.h>
> diff --git a/drivers/gpu/drm/radeon/radeon_drv.c
b/drivers/gpu/drm/radeon/radeon_drv.c
> index b74cebca1f89..9b606c1b11ec 100644
> --- a/drivers/gpu/drm/radeon/radeon_drv.c
> +++ b/drivers/gpu/drm/radeon/radeon_drv.c
> @@ -31,7 +31,6 @@
>  
>  
>  #include <linux/compat.h>
> -#include <linux/console.h>
>  #include <linux/module.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/vga_switcheroo.h>
> diff --git a/drivers/gpu/drm/tiny/bochs.c b/drivers/gpu/drm/tiny/bochs.c
> index 2ce3bd903b70..04333f78be55 100644
> --- a/drivers/gpu/drm/tiny/bochs.c
> +++ b/drivers/gpu/drm/tiny/bochs.c
> @@ -1,6 +1,5 @@
>  // SPDX-License-Identifier: GPL-2.0-or-later
>  
> -#include <linux/console.h>
>  #include <linux/pci.h>
>  
>  #include <drm/drm_aperture.h>
> diff --git a/drivers/gpu/drm/tiny/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c
> index 4611ec408506..8bd674f0d682 100644
> --- a/drivers/gpu/drm/tiny/cirrus.c
> +++ b/drivers/gpu/drm/tiny/cirrus.c
> @@ -16,7 +16,6 @@
>   * Copyright 1999-2001 Jeff Garzik <jgarzik at pobox.com>
>   */
>  
> -#include <linux/console.h>
>  #include <linux/dma-buf-map.h>
>  #include <linux/module.h>
>  #include <linux/pci.h>
> diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c
b/drivers/gpu/drm/vboxvideo/vbox_drv.c
> index a6c81af37345..e6d983121d0b 100644
> --- a/drivers/gpu/drm/vboxvideo/vbox_drv.c
> +++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c
> @@ -7,7 +7,6 @@
>   *          Michael Thayer <michael.thayer at oracle.com,
>   *          Hans de Goede <hdegoede at redhat.com>
>   */
> -#include <linux/console.h>
>  #include <linux/module.h>
>  #include <linux/pci.h>
>  #include <linux/vt_kern.h>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c
b/drivers/gpu/drm/virtio/virtgpu_drv.c
> index 749db18dcfa2..cd4c170236f1 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_drv.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
> @@ -27,7 +27,6 @@
>   */
>  
>  #include <linux/module.h>
> -#include <linux/console.h>
>  #include <linux/pci.h>
>  #include <linux/poll.h>
>  #include <linux/wait.h>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> index ab9a1750e1df..fcc4b5a7f639 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> @@ -25,7 +25,6 @@
>   *
>  
**************************************************************************/
>  
> -#include <linux/console.h>
>  #include <linux/dma-mapping.h>
>  #include <linux/module.h>
>  #include <linux/pci.h>
> diff --git a/drivers/video/console/vgacon.c
b/drivers/video/console/vgacon.c
> index ef9c57ce0906..d4320b147956 100644
> --- a/drivers/video/console/vgacon.c
> +++ b/drivers/video/console/vgacon.c
> @@ -97,30 +97,9 @@ static int 		vga_video_font_height;
>  static int 		vga_scan_lines		__read_mostly;
>  static unsigned int 	vga_rolled_over; /* last vc_origin offset before wrap
*/
>  
> -static bool vgacon_text_mode_force;
>  static bool vga_hardscroll_enabled;
>  static bool vga_hardscroll_user_enable = true;
>  
> -bool vgacon_text_force(void)
> -{
> -	return vgacon_text_mode_force;
> -}
> -EXPORT_SYMBOL(vgacon_text_force);
> -
> -static int __init text_mode(char *str)
> -{
> -	vgacon_text_mode_force = true;
> -
> -	pr_warn("You have booted with nomodeset. This means your GPU drivers
are DISABLED\n");
> -	pr_warn("Any video related functionality will be severely degraded,
and you may not even be able to suspend the system properly\n");
> -	pr_warn("Unless you actually understand what nomodeset does, you
should reboot without enabling it\n");
> -
> -	return 1;
> -}
> -
> -/* force text mode - used by kernel modesetting */
> -__setup("nomodeset", text_mode);
> -
>  static int __init no_scroll(char *str)
>  {
>  	/*
> diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
> index 48b7de80daf5..e1d2042a7b77 100644
> --- a/include/drm/drm_mode_config.h
> +++ b/include/drm/drm_mode_config.h
> @@ -969,4 +969,10 @@ static inline int drm_mode_config_init(struct
drm_device *dev)
>  void drm_mode_config_reset(struct drm_device *dev);
>  void drm_mode_config_cleanup(struct drm_device *dev);
>  
> +#ifdef CONFIG_VGA_CONSOLE
> +extern bool vgacon_text_force(void);
> +#else
> +static inline bool vgacon_text_force(void) { return false; }
> +#endif
> +
As said, maybe the CONFIG_VGA_CONSOLE ifdef should be dropped.

Also, this seems like a completely arbitrary choice of header to place
this.


BR,
Jani.

>  #endif
> diff --git a/include/linux/console.h b/include/linux/console.h
> index 20874db50bc8..d4dd8384898b 100644
> --- a/include/linux/console.h
> +++ b/include/linux/console.h
> @@ -217,12 +217,6 @@ extern atomic_t ignore_console_lock_warning;
>  #define VESA_HSYNC_SUSPEND      2
>  #define VESA_POWERDOWN          3
>  
> -#ifdef CONFIG_VGA_CONSOLE
> -extern bool vgacon_text_force(void);
> -#else
> -static inline bool vgacon_text_force(void) { return false; }
> -#endif
> -
>  extern void console_init(void);
>  
>  /* For deferred console takeover */
-- 
Jani Nikula, Intel Open Source Graphics Center

Javier Martinez Canillas

2021-Nov-03 13:06 UTC

head link

[Nouveau] [RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

Hello Thomas,

On 11/3/21 13:41, Thomas Zimmermann wrote:> Hi
> 
> Am 03.11.21 um 13:28 schrieb Javier Martinez Canillas:
>> The "nomodeset" kernel cmdline parameter is handled by the
vgacon driver
>> but the exported vgacon_text_force() symbol is only used by DRM
drivers.
>>
>> It makes much more sense for the parameter logic to be in the subsystem
>> of the drivers that are making use of it. Let's move that to DRM.
>>
>> Suggested-by: Daniel Vetter <daniel.vetter at ffwll.ch>
>> Signed-off-by: Javier Martinez Canillas <javierm at redhat.com>
>> ---
>>
>>   drivers/gpu/drm/Makefile                |  2 ++
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c |  3 +--
>>   drivers/gpu/drm/ast/ast_drv.c           |  1 -
>>   drivers/gpu/drm/drm_nomodeset.c         | 26
+++++++++++++++++++++++++
>>   drivers/gpu/drm/i915/i915_module.c      |  2 --
>>   drivers/gpu/drm/mgag200/mgag200_drv.c   |  1 -
>>   drivers/gpu/drm/nouveau/nouveau_drm.c   |  1 -
>>   drivers/gpu/drm/qxl/qxl_drv.c           |  1 -
>>   drivers/gpu/drm/radeon/radeon_drv.c     |  1 -
>>   drivers/gpu/drm/tiny/bochs.c            |  1 -
>>   drivers/gpu/drm/tiny/cirrus.c           |  1 -
>>   drivers/gpu/drm/vboxvideo/vbox_drv.c    |  1 -
>>   drivers/gpu/drm/virtio/virtgpu_drv.c    |  1 -
>>   drivers/gpu/drm/vmwgfx/vmwgfx_drv.c     |  1 -
>>   drivers/video/console/vgacon.c          | 21 --------------------
>>   include/drm/drm_mode_config.h           |  6 ++++++
>>   include/linux/console.h                 |  6 ------
>>   17 files changed, 35 insertions(+), 41 deletions(-)
>>   create mode 100644 drivers/gpu/drm/drm_nomodeset.c
>>
>> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
>> index 1c41156deb5f..0e2d60ea93ca 100644
>> --- a/drivers/gpu/drm/Makefile
>> +++ b/drivers/gpu/drm/Makefile
>> @@ -33,6 +33,8 @@ drm-$(CONFIG_DRM_PRIVACY_SCREEN) +=
drm_privacy_screen.o drm_privacy_screen_x86.
>>   
>>   obj-$(CONFIG_DRM_DP_AUX_BUS) += drm_dp_aux_bus.o
>>   
>> +obj-y += drm_nomodeset.o
> 
> Repeating my other comment, should this rather be protected by a 
> separate config symbol that is selected by CONFIG_DRM?
>
I actually thought about that and my opinion is that obj-y reflects
what we really want here or do you envision this getting disabled
in some cases ?

Probably the problem is Kbuild descending into the drivers/gpu dir
even when CONFIG_DRM is not set. Maybe what we want is something
like the following instead?

diff --git a/drivers/gpu/Makefile b/drivers/gpu/Makefile
index 835c88318cec..ef12ee05ba6e 100644
--- a/drivers/gpu/Makefile
+++ b/drivers/gpu/Makefile
@@ -3,6 +3,7 @@
 # taken to initialize them in the correct order. Link order is the only way
 # to ensure this currently.
 obj-$(CONFIG_TEGRA_HOST1X)     += host1x/
-obj-y                  += drm/ vga/
+obj-$(CONFIG_DRM)              += drm/
+obj-y                          += vga/
 obj-$(CONFIG_IMX_IPUV3_CORE)   += ipu-v3/
 obj-$(CONFIG_TRACE_GPU_MEM)            += trace/

Best regards, -- 
Javier Martinez Canillas
Linux Engineering
Red Hat

Javier Martinez Canillas

2021-Nov-03 13:09 UTC

head link

[Nouveau] [RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

Hello Jani,

On 11/3/21 13:56, Jani Nikula wrote:

[snip]
>>  
>> +obj-y += drm_nomodeset.o
> 
> This is a subtle functional change. With this, you'll always have
> __setup("nomodeset", text_mode) builtin and the parameter
available. And
> using nomodeset will print out the pr_warn() splat from text_mode(). But
> removing nomodeset will have no impact if CONFIG_VGA_CONSOLE=n as that
> leads to vgacon_text_force() always returning false.
>
Yes, that's what I decided at the end to make it unconditional. That
way the same behaviour is preserved (even when only DRM drivers are
using the exported symbol).
 > To not make functional changes, this should be:
> 
> obj-$(CONFIG_VGA_CONSOLE) += drm_nomodeset.o
>
Right, that should work.
> Now, going with the cleanup in this series, maybe we should make the
> functional change, and break the connection to CONFIG_VGA_CONSOLE
> altogether, also in the header?
> 
> (Maybe we'll also need a proxy drm kconfig option to only have
> drm_modeset.o builtin when CONFIG_DRM != n.)
>
See my other email. I believe the issue is drivers/gpu/drm always
being included even when CONFIG_DRM is not set.

Best regards, -- 
Javier Martinez Canillas
Linux Engineering
Red Hat

Nouveau - Nov 2021 - [RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

[Nouveau] [RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

[RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

[RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

[Nouveau] [RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem

[Nouveau] [RESEND PATCH 2/5] drm: Move nomodeset kernel parameter handler to the DRM subsystem