Starting from IVB, pipe C can be fused off. We have yet to see such configuration in the wild though (ie not tested). v2: Actually tweak num_pipes, not num_planes. Signed-off-by: Damien Lespiau <damien.lespiau@xxxxxxxxx> --- drivers/gpu/drm/i915/i915_dma.c | 4 ++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 3e9828c..6d39f94 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1480,6 +1480,10 @@ static void intel_device_info_runtime_init(struct drm_device *dev) DRM_DEBUG_DRIVER("Display fused off, disabling\n"); info->num_pipes = 0; } + if (fuse_strap & IVB_PIPE_C_DISABLE) { + DRM_DEBUG_DRIVER("Pipe C fused off, disabling\n"); + info->num_pipes = 2; + } } } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 5a0cd52..9e127b2 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4118,6 +4118,7 @@ #define ILK_INTERNAL_GRAPHICS_DISABLE (1 << 31) #define ILK_INTERNAL_DISPLAY_DISABLE (1 << 30) #define ILK_DISPLAY_DEBUG_DISABLE (1 << 29) +#define IVB_PIPE_C_DISABLE (1 << 28) #define ILK_HDCP_DISABLE (1 << 25) #define ILK_eDP_A_DISABLE (1 << 24) #define HSW_CDCLK_LIMIT (1 << 24) -- 1.8.3.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx