From be9a3dbf65a69933b06011f049b1e2fdfa6bc8b9 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Fri, 23 Jul 2010 12:03:37 -0700 Subject: [PATCH] drm/i915: handle shared framebuffers when flipping If a framebuffer is shared across CRTCs, the x,y position of one of them is likely to be something other than the origin (e.g. for extended desktop configs). So calculate the offset at flip time so such configurations can work. Fixes https://bugs.freedesktop.org/show_bug.cgi?id=28518. Signed-off-by: Jesse Barnes Tested-by: Thomas M. Tested-by: fangxun Cc: stable@kernel.org Signed-off-by: Eric Anholt --- drivers/gpu/drm/i915/intel_display.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 68dcf36e2793..ab8162afb4a7 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4695,7 +4695,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, struct drm_gem_object *obj; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_unpin_work *work; - unsigned long flags; + unsigned long flags, offset; int pipesrc_reg = (intel_crtc->pipe == 0) ? PIPEASRC : PIPEBSRC; int ret, pipesrc; u32 flip_mask; @@ -4762,19 +4762,23 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, while (I915_READ(ISR) & flip_mask) ; + /* Offset into the new buffer for cases of shared fbs between CRTCs */ + offset = obj_priv->gtt_offset; + offset += (crtc->y * fb->pitch) + (crtc->x * (fb->bits_per_pixel) / 8); + BEGIN_LP_RING(4); if (IS_I965G(dev)) { OUT_RING(MI_DISPLAY_FLIP | MI_DISPLAY_FLIP_PLANE(intel_crtc->plane)); OUT_RING(fb->pitch); - OUT_RING(obj_priv->gtt_offset | obj_priv->tiling_mode); + OUT_RING(offset | obj_priv->tiling_mode); pipesrc = I915_READ(pipesrc_reg); OUT_RING(pipesrc & 0x0fff0fff); } else { OUT_RING(MI_DISPLAY_FLIP_I915 | MI_DISPLAY_FLIP_PLANE(intel_crtc->plane)); OUT_RING(fb->pitch); - OUT_RING(obj_priv->gtt_offset); + OUT_RING(offset); OUT_RING(MI_NOOP); } ADVANCE_LP_RING();