From 5e1e40dda5b675e1432a0f9d2d8943196f7a1130 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Fri, 26 Mar 2010 10:35:20 -0700 Subject: [PATCH 2/2] drm/i915: gen3 page flipping fixes Gen3 chips have slightly different flip commands, and also contain a bit that indicates whether a "flip pending" interrupt means the flip has been queued or has been completed. So implement support for the gen3 flip command, and make sure we use the flip pending interrupt correctly depending on the value of ECOSKPD bit 0. Signed-off-by: Jesse Barnes --- drivers/gpu/drm/i915/i915_dma.c | 4 ++++ drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_irq.c | 16 ++++++++++++---- drivers/gpu/drm/i915/i915_reg.h | 4 ++++ drivers/gpu/drm/i915/intel_display.c | 29 ++++++++++++++++++++++++----- drivers/gpu/drm/i915/intel_drv.h | 1 + 6 files changed, 46 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 84ce956..4d59710 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1408,6 +1408,10 @@ static int i915_load_modeset_init(struct drm_device *dev, if (ret) goto destroy_ringbuffer; + /* IIR "flip pending" bit means done if this bit is set */ + if (IS_GEN3(dev) && (I915_READ(ECOSKPD) & ECO_FLIP_DONE)) + dev_priv->flip_pending_is_done = true; + intel_modeset_init(dev); ret = drm_irq_install(dev); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 9ed8ecd..fd62d1e 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -595,6 +595,7 @@ typedef struct drm_i915_private { struct drm_crtc *plane_to_crtc_mapping[2]; struct drm_crtc *pipe_to_crtc_mapping[2]; wait_queue_head_t pending_flip_queue; + bool flip_pending_is_done; /* Reclocking support */ bool render_reclock_avail; diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 2479be0..a846cd8 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -940,22 +940,30 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS) if (HAS_BSD(dev) && (iir & I915_BSD_USER_INTERRUPT)) DRM_WAKEUP(&dev_priv->bsd_ring.irq_queue); - if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) + if (iir & I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT) { intel_prepare_page_flip(dev, 0); + if (dev_priv->flip_pending_is_done) + intel_finish_page_flip_plane(dev, 0); + } - if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) + if (iir & I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT) { + if (dev_priv->flip_pending_is_done) + intel_finish_page_flip_plane(dev, 1); intel_prepare_page_flip(dev, 1); + } if (pipea_stats & vblank_status) { vblank++; drm_handle_vblank(dev, 0); - intel_finish_page_flip(dev, 0); + if (!dev_priv->flip_pending_is_done) + intel_finish_page_flip(dev, 0); } if (pipeb_stats & vblank_status) { vblank++; drm_handle_vblank(dev, 1); - intel_finish_page_flip(dev, 1); + if (!dev_priv->flip_pending_is_done) + intel_finish_page_flip(dev, 1); } if ((pipea_stats & I915_LEGACY_BLC_EVENT_STATUS) || diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 64b0a3a..2cae38a 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -178,6 +178,7 @@ #define MI_OVERLAY_OFF (0x2<<21) #define MI_LOAD_SCAN_LINES_INCL MI_INSTR(0x12, 0) #define MI_DISPLAY_FLIP MI_INSTR(0x14, 2) +#define MI_DISPLAY_FLIP_I915 MI_INSTR(0x14, 1) #define MI_DISPLAY_FLIP_PLANE(n) ((n) << 20) #define MI_STORE_DWORD_IMM MI_INSTR(0x20, 1) #define MI_MEM_VIRTUAL (1 << 22) /* 965+ only */ @@ -368,6 +369,9 @@ #define CM0_RC_OP_FLUSH_DISABLE (1<<0) #define BB_ADDR 0x02140 /* 8 bytes */ #define GFX_FLSH_CNTL 0x02170 /* 915+ only */ +#define ECOSKPD 0x021d0 +#define ECO_GATING_CX_ONLY (1<<3) +#define ECO_FLIP_DONE (1<<0) /* GEN6 interrupt control */ #define GEN6_RENDER_HWSTAM 0x2098 diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f460761..ac23b29 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4587,10 +4587,10 @@ static void intel_unpin_work_fn(struct work_struct *__work) kfree(work); } -void intel_finish_page_flip(struct drm_device *dev, int pipe) +static void do_intel_finish_page_flip(struct drm_device *dev, + struct drm_crtc *crtc) { drm_i915_private_t *dev_priv = dev->dev_private; - struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_unpin_work *work; struct drm_i915_gem_object *obj_priv; @@ -4634,6 +4634,22 @@ void intel_finish_page_flip(struct drm_device *dev, int pipe) schedule_work(&work->work); } +void intel_finish_page_flip(struct drm_device *dev, int pipe) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe]; + + do_intel_finish_page_flip(dev, crtc); +} + +void intel_finish_page_flip_plane(struct drm_device *dev, int plane) +{ + drm_i915_private_t *dev_priv = dev->dev_private; + struct drm_crtc *crtc = dev_priv->plane_to_crtc_mapping[plane]; + + do_intel_finish_page_flip(dev, crtc); +} + void intel_prepare_page_flip(struct drm_device *dev, int plane) { drm_i915_private_t *dev_priv = dev->dev_private; @@ -4729,14 +4745,17 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, ; BEGIN_LP_RING(4); - OUT_RING(MI_DISPLAY_FLIP | - MI_DISPLAY_FLIP_PLANE(intel_crtc->plane)); - OUT_RING(fb->pitch); 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); 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(MI_NOOP); } diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index df931f7..72206f3 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -224,6 +224,7 @@ extern void intel_fbdev_fini(struct drm_device *dev); extern void intel_prepare_page_flip(struct drm_device *dev, int plane); extern void intel_finish_page_flip(struct drm_device *dev, int pipe); +extern void intel_finish_page_flip_plane(struct drm_device *dev, int plane); extern void intel_setup_overlay(struct drm_device *dev); extern void intel_cleanup_overlay(struct drm_device *dev); -- 1.6.6.1