From 698443d9ec1a33eff65b27b9514e06998bf57eb3 Mon Sep 17 00:00:00 2001 From: Dave Airlie Date: Fri, 18 Sep 2009 14:16:38 +1000 Subject: drm/radeon/kms: disable VGA rendering engine before taking over VRAM Before we use any of VRAM, we need to disable the VGA rendering engine, this render text mode into a graphical framebuffer for scanout, however it does this on vblank, and can end up overwriting the GART table and r600 shader objects. Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/avivod.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/gpu/drm/radeon/avivod.h') diff --git a/drivers/gpu/drm/radeon/avivod.h b/drivers/gpu/drm/radeon/avivod.h index d4e6e6e4a938..e2b92c445bab 100644 --- a/drivers/gpu/drm/radeon/avivod.h +++ b/drivers/gpu/drm/radeon/avivod.h @@ -57,4 +57,13 @@ #define VGA_RENDER_CONTROL 0x0300 #define VGA_VSTATUS_CNTL_MASK 0x00030000 +/* AVIVO disable VGA rendering */ +static inline void radeon_avivo_vga_render_disable(struct radeon_device *rdev) +{ + u32 vga_render; + vga_render = RREG32(VGA_RENDER_CONTROL); + vga_render &= ~VGA_VSTATUS_CNTL_MASK; + WREG32(VGA_RENDER_CONTROL, vga_render); +} + #endif -- cgit v1.2.3