drm/radeon: restore nomodeset operation (v2)

commit e9ced8e040ebe40e9953db90acbe7d0b58702ebb upstream.

When UMS was deprecated it removed support for nomodeset commandline
we really want this in distro land so we can debug stuff, everyone
should fallback to vesa correctly.

v2: oops -1 isn't used anymore, restore original behaviour
-1 is default, so we can boot with nomodeset on the command line,
then use radeon.modeset=1 to override it for debugging later.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 66a7f0fd96201f09a7f540057d62c9bd89d6b23e..96cf43901b5bd3e43df7992e448ba55b9d5f9875 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -144,7 +144,7 @@ static inline void radeon_unregister_atpx_handler(void) {}
 #endif
 
 int radeon_no_wb;
-int radeon_modeset = 1;
+int radeon_modeset = -1;
 int radeon_dynclks = -1;
 int radeon_r4xx_atom = 0;
 int radeon_agpmode = 0;
@@ -449,6 +449,16 @@ static struct pci_driver radeon_kms_pci_driver = {
 
 static int __init radeon_init(void)
 {
+#ifdef CONFIG_VGA_CONSOLE
+       if (vgacon_text_force() && radeon_modeset == -1) {
+               DRM_INFO("VGACON disable radeon kernel modesetting.\n");
+               radeon_modeset = 0;
+       }
+#endif
+       /* set to modesetting by default if not nomodeset */
+       if (radeon_modeset == -1)
+               radeon_modeset = 1;
+
        if (radeon_modeset == 1) {
                DRM_INFO("radeon kernel modesetting enabled.\n");
                driver = &kms_driver;