Commit 80824003 authored by Jesse Barnes's avatar Jesse Barnes Committed by Eric Anholt
Browse files

drm/i915: framebuffer compression for pre-GM45 



This patch adds framebuffer compression (good for about ~0.5W power
savings in the best case) support for pre-GM45 chips.  GM45+ have a new,
more flexible FBC scheme that will be added in a separate patch.

FBC can't always be enabled: the compressed buffer must be physically
contiguous and reside in stolen space.  So if you have a large display
and a small amount of stolen memory, you may not be able to take
advantage of FBC.  In some cases, a BIOS setting controls how much
stolen space is available.  Increasing this to 8 or 16M can help.

Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
parent 06324194

drivers/gpu/drm/i915/i915_dma.c

+157 −4
Original line number Diff line number Diff line
@@ -921,7 +921,8 @@ static int i915_get_bridge_dev(struct drm_device *dev) 
 * how much was set aside so we can use it for our own purposes.

 */

static int i915_probe_agp(struct drm_device *dev, uint32_t *aperture_size,

			  uint32_t *preallocated_size)

			  uint32_t *preallocated_size,

			  uint32_t *start)

{

	struct drm_i915_private *dev_priv = dev->dev_private;

	u16 tmp = 0;
@@ -1008,11 +1009,148 @@ static int i915_probe_agp(struct drm_device *dev, uint32_t *aperture_size, 
		return -1;

	}

	*preallocated_size = stolen - overhead;

	*start = overhead;



	return 0;

}



#define PTE_ADDRESS_MASK		0xfffff000

#define PTE_ADDRESS_MASK_HIGH		0x000000f0 /* i915+ */

#define PTE_MAPPING_TYPE_UNCACHED	(0 << 1)

#define PTE_MAPPING_TYPE_DCACHE		(1 << 1) /* i830 only */

#define PTE_MAPPING_TYPE_CACHED		(3 << 1)

#define PTE_MAPPING_TYPE_MASK		(3 << 1)

#define PTE_VALID			(1 << 0)



/**

 * i915_gtt_to_phys - take a GTT address and turn it into a physical one

 * @dev: drm device

 * @gtt_addr: address to translate

 *

 * Some chip functions require allocations from stolen space but need the

 * physical address of the memory in question.  We use this routine

 * to get a physical address suitable for register programming from a given

 * GTT address.

 */

static unsigned long i915_gtt_to_phys(struct drm_device *dev,

				      unsigned long gtt_addr)

{

	unsigned long *gtt;

	unsigned long entry, phys;

	int gtt_bar = IS_I9XX(dev) ? 0 : 1;

	int gtt_offset, gtt_size;



	if (IS_I965G(dev)) {

		if (IS_G4X(dev) || IS_IGDNG(dev)) {

			gtt_offset = 2*1024*1024;

			gtt_size = 2*1024*1024;

		} else {

			gtt_offset = 512*1024;

			gtt_size = 512*1024;

		}

	} else {

		gtt_bar = 3;

		gtt_offset = 0;

		gtt_size = pci_resource_len(dev->pdev, gtt_bar);

	}



	gtt = ioremap_wc(pci_resource_start(dev->pdev, gtt_bar) + gtt_offset,

			 gtt_size);

	if (!gtt) {

		DRM_ERROR("ioremap of GTT failed\n");

		return 0;

	}



	entry = *(volatile u32 *)(gtt + (gtt_addr / 1024));



	DRM_DEBUG("GTT addr: 0x%08lx, PTE: 0x%08lx\n", gtt_addr, entry);



	/* Mask out these reserved bits on this hardware. */

	if (!IS_I9XX(dev) || IS_I915G(dev) || IS_I915GM(dev) ||

	    IS_I945G(dev) || IS_I945GM(dev)) {

		entry &= ~PTE_ADDRESS_MASK_HIGH;

	}



	/* If it's not a mapping type we know, then bail. */

	if ((entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_UNCACHED &&

	    (entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_CACHED)	{

		iounmap(gtt);

		return 0;

	}



	if (!(entry & PTE_VALID)) {

		DRM_ERROR("bad GTT entry in stolen space\n");

		iounmap(gtt);

		return 0;

	}



	iounmap(gtt);



	phys =(entry & PTE_ADDRESS_MASK) |

		((uint64_t)(entry & PTE_ADDRESS_MASK_HIGH) << (32 - 4));



	DRM_DEBUG("GTT addr: 0x%08lx, phys addr: 0x%08lx\n", gtt_addr, phys);



	return phys;

}



static void i915_warn_stolen(struct drm_device *dev)

{

	DRM_ERROR("not enough stolen space for compressed buffer, disabling\n");

	DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n");

}



static void i915_setup_compression(struct drm_device *dev, int size)

{

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct drm_mm_node *compressed_fb, *compressed_llb;

	unsigned long cfb_base, ll_base;



	/* Leave 1M for line length buffer & misc. */

	compressed_fb = drm_mm_search_free(&dev_priv->vram, size, 4096, 0);

	if (!compressed_fb) {

		i915_warn_stolen(dev);

		return;

	}



	compressed_fb = drm_mm_get_block(compressed_fb, size, 4096);

	if (!compressed_fb) {

		i915_warn_stolen(dev);

		return;

	}



	compressed_llb = drm_mm_search_free(&dev_priv->vram, 4096, 4096, 0);

	if (!compressed_llb) {

		i915_warn_stolen(dev);

		return;

	}



	compressed_llb = drm_mm_get_block(compressed_fb, 4096, 4096);

	if (!compressed_llb) {

		i915_warn_stolen(dev);

		return;

	}



	dev_priv->cfb_size = size;



	cfb_base = i915_gtt_to_phys(dev, compressed_fb->start);

	ll_base = i915_gtt_to_phys(dev, compressed_llb->start);

	if (!cfb_base || !ll_base) {

		DRM_ERROR("failed to get stolen phys addr, disabling FBC\n");

		drm_mm_put_block(compressed_fb);

		drm_mm_put_block(compressed_llb);

	}



	i8xx_disable_fbc(dev);



	DRM_DEBUG("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base,

		  ll_base, size >> 20);

	I915_WRITE(FBC_CFB_BASE, cfb_base);

	I915_WRITE(FBC_LL_BASE, ll_base);

}



static int i915_load_modeset_init(struct drm_device *dev,

				  unsigned long prealloc_start,

				  unsigned long prealloc_size,

				  unsigned long agp_size)

{
@@ -1033,6 +1171,7 @@ static int i915_load_modeset_init(struct drm_device *dev, 


	/* Basic memrange allocator for stolen space (aka vram) */

	drm_mm_init(&dev_priv->vram, 0, prealloc_size);

	DRM_INFO("set up %ldM of stolen space\n", prealloc_size / (1024*1024));



	/* Let GEM Manage from end of prealloc space to end of aperture.

	 *
@@ -1049,6 +1188,19 @@ static int i915_load_modeset_init(struct drm_device *dev, 
	if (ret)

		goto out;



	/* Try to set up FBC with a reasonable compressed buffer size */

	if (IS_MOBILE(dev) && (IS_I9XX(dev) || IS_I965G(dev)) &&

	    i915_powersave) {

		int cfb_size;



		/* Try to get an 8M buffer... */

		if (prealloc_size > (9*1024*1024))

			cfb_size = 8*1024*1024;

		else /* fall back to 7/8 of the stolen space */

			cfb_size = prealloc_size * 7 / 8;

		i915_setup_compression(dev, cfb_size);

	}



	/* Allow hardware batchbuffers unless told otherwise.

	 */

	dev_priv->allow_batchbuffer = 1;
@@ -1161,7 +1313,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) 
	struct drm_i915_private *dev_priv = dev->dev_private;

	resource_size_t base, size;

	int ret = 0, mmio_bar = IS_I9XX(dev) ? 0 : 1;

	uint32_t agp_size, prealloc_size;

	uint32_t agp_size, prealloc_size, prealloc_start;



	/* i915 has 4 more counters */

	dev->counters += 4;
@@ -1215,7 +1367,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) 
			 "performance may suffer.\n");

	}



	ret = i915_probe_agp(dev, &agp_size, &prealloc_size);

	ret = i915_probe_agp(dev, &agp_size, &prealloc_size, &prealloc_start);

	if (ret)

		goto out_iomapfree;
@@ -1282,7 +1434,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) 
	}



	if (drm_core_check_feature(dev, DRIVER_MODESET)) {

		ret = i915_load_modeset_init(dev, prealloc_size, agp_size);

		ret = i915_load_modeset_init(dev, prealloc_start,

					     prealloc_size, agp_size);

		if (ret < 0) {

			DRM_ERROR("failed to init modeset\n");

			goto out_workqueue_free;

drivers/gpu/drm/i915/i915_drv.h

+12 −0
Original line number Diff line number Diff line
@@ -48,6 +48,11 @@ enum pipe { 
	PIPE_B,

};



enum plane {

	PLANE_A = 0,

	PLANE_B,

};



#define I915_NUM_PIPE	2



/* Interface history:
@@ -202,6 +207,11 @@ typedef struct drm_i915_private { 


	struct drm_mm vram;



	unsigned long cfb_size;

	unsigned long cfb_pitch;

	int cfb_fence;

	int cfb_plane;



	int irq_enabled;



	struct intel_opregion opregion;
@@ -768,6 +778,7 @@ static inline void opregion_enable_asle(struct drm_device *dev) { return; } 
/* modesetting */

extern void intel_modeset_init(struct drm_device *dev);

extern void intel_modeset_cleanup(struct drm_device *dev);

extern void i8xx_disable_fbc(struct drm_device *dev);



/**

 * Lock test for when it's just for synchronization of ring access.
@@ -918,6 +929,7 @@ extern int i915_wait_ring(struct drm_device * dev, int n, const char *caller); 


#define HAS_FW_BLC(dev) (IS_I9XX(dev) || IS_G4X(dev) || IS_IGDNG(dev))

#define HAS_PIPE_CXSR(dev) (IS_G4X(dev) || IS_IGDNG(dev))

#define I915_HAS_FBC(dev) (IS_I9XX(dev) || IS_I965G(dev))



#define PRIMARY_RINGBUFFER_SIZE         (128*1024)

drivers/gpu/drm/i915/i915_reg.h

+1 −0
Original line number Diff line number Diff line
@@ -343,6 +343,7 @@ 
#define   FBC_CTL_PLANEA	(0<<0)

#define   FBC_CTL_PLANEB	(1<<0)

#define FBC_FENCE_OFF		0x0321b

#define FBC_TAG			0x03300



#define FBC_LL_SIZE		(1536)

drivers/gpu/drm/i915/intel_display.c

+209 −13
Original line number Diff line number Diff line
@@ -954,6 +954,174 @@ intel_wait_for_vblank(struct drm_device *dev) 
	mdelay(20);

}



/* Parameters have changed, update FBC info */

static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)

{

	struct drm_device *dev = crtc->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct drm_framebuffer *fb = crtc->fb;

	struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);

	struct drm_i915_gem_object *obj_priv = intel_fb->obj->driver_private;

	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	int plane, i;

	u32 fbc_ctl, fbc_ctl2;



	dev_priv->cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE;



	if (fb->pitch < dev_priv->cfb_pitch)

		dev_priv->cfb_pitch = fb->pitch;



	/* FBC_CTL wants 64B units */

	dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1;

	dev_priv->cfb_fence = obj_priv->fence_reg;

	dev_priv->cfb_plane = intel_crtc->plane;

	plane = dev_priv->cfb_plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;



	/* Clear old tags */

	for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)

		I915_WRITE(FBC_TAG + (i * 4), 0);



	/* Set it up... */

	fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | plane;

	if (obj_priv->tiling_mode != I915_TILING_NONE)

		fbc_ctl2 |= FBC_CTL_CPU_FENCE;

	I915_WRITE(FBC_CONTROL2, fbc_ctl2);

	I915_WRITE(FBC_FENCE_OFF, crtc->y);



	/* enable it... */

	fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC;

	fbc_ctl |= (dev_priv->cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;

	fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT;

	if (obj_priv->tiling_mode != I915_TILING_NONE)

		fbc_ctl |= dev_priv->cfb_fence;

	I915_WRITE(FBC_CONTROL, fbc_ctl);



	DRM_DEBUG("enabled FBC, pitch %ld, yoff %d, plane %d, ",

		  dev_priv->cfb_pitch, crtc->y, dev_priv->cfb_plane);

}



void i8xx_disable_fbc(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = dev->dev_private;

	u32 fbc_ctl;



	/* Disable compression */

	fbc_ctl = I915_READ(FBC_CONTROL);

	fbc_ctl &= ~FBC_CTL_EN;

	I915_WRITE(FBC_CONTROL, fbc_ctl);



	/* Wait for compressing bit to clear */

	while (I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING)

		; /* nothing */



	intel_wait_for_vblank(dev);



	DRM_DEBUG("disabled FBC\n");

}



static bool i8xx_fbc_enabled(struct drm_crtc *crtc)

{

	struct drm_device *dev = crtc->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;



	return I915_READ(FBC_CONTROL) & FBC_CTL_EN;

}



/**

 * intel_update_fbc - enable/disable FBC as needed

 * @crtc: CRTC to point the compressor at

 * @mode: mode in use

 *

 * Set up the framebuffer compression hardware at mode set time.  We

 * enable it if possible:

 *   - plane A only (on pre-965)

 *   - no pixel mulitply/line duplication

 *   - no alpha buffer discard

 *   - no dual wide

 *   - framebuffer <= 2048 in width, 1536 in height

 *

 * We can't assume that any compression will take place (worst case),

 * so the compressed buffer has to be the same size as the uncompressed

 * one.  It also must reside (along with the line length buffer) in

 * stolen memory.

 *

 * We need to enable/disable FBC on a global basis.

 */

static void intel_update_fbc(struct drm_crtc *crtc,

			     struct drm_display_mode *mode)

{

	struct drm_device *dev = crtc->dev;

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct drm_framebuffer *fb = crtc->fb;

	struct intel_framebuffer *intel_fb;

	struct drm_i915_gem_object *obj_priv;

	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	int plane = intel_crtc->plane;



	if (!i915_powersave)

		return;



	if (!crtc->fb)

		return;



	intel_fb = to_intel_framebuffer(fb);

	obj_priv = intel_fb->obj->driver_private;



	/*

	 * If FBC is already on, we just have to verify that we can

	 * keep it that way...

	 * Need to disable if:

	 *   - changing FBC params (stride, fence, mode)

	 *   - new fb is too large to fit in compressed buffer

	 *   - going to an unsupported config (interlace, pixel multiply, etc.)

	 */

	if (intel_fb->obj->size > dev_priv->cfb_size) {

		DRM_DEBUG("framebuffer too large, disabling compression\n");

		goto out_disable;

	}

	if ((mode->flags & DRM_MODE_FLAG_INTERLACE) ||

	    (mode->flags & DRM_MODE_FLAG_DBLSCAN)) {

		DRM_DEBUG("mode incompatible with compression, disabling\n");

		goto out_disable;

	}

	if ((mode->hdisplay > 2048) ||

	    (mode->vdisplay > 1536)) {

		DRM_DEBUG("mode too large for compression, disabling\n");

		goto out_disable;

	}

	if (IS_I9XX(dev) && plane != 0) {

		DRM_DEBUG("plane not 0, disabling compression\n");

		goto out_disable;

	}

	if (obj_priv->tiling_mode != I915_TILING_X) {

		DRM_DEBUG("framebuffer not tiled, disabling compression\n");

		goto out_disable;

	}



	if (i8xx_fbc_enabled(crtc)) {

		/* We can re-enable it in this case, but need to update pitch */

		if (fb->pitch > dev_priv->cfb_pitch)

			i8xx_disable_fbc(dev);

		if (obj_priv->fence_reg != dev_priv->cfb_fence)

			i8xx_disable_fbc(dev);

		if (plane != dev_priv->cfb_plane)

			i8xx_disable_fbc(dev);

	}



	if (!i8xx_fbc_enabled(crtc)) {

		/* Now try to turn it back on if possible */

		i8xx_enable_fbc(crtc, 500);

	}



	return;



out_disable:

	DRM_DEBUG("unsupported config, disabling FBC\n");

	/* Multiple disables should be harmless */

	if (i8xx_fbc_enabled(crtc))

		i8xx_disable_fbc(dev);

}



static int

intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,

		    struct drm_framebuffer *old_fb)
@@ -966,12 +1134,13 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y, 
	struct drm_i915_gem_object *obj_priv;

	struct drm_gem_object *obj;

	int pipe = intel_crtc->pipe;

	int plane = intel_crtc->plane;

	unsigned long Start, Offset;

	int dspbase = (pipe == 0 ? DSPAADDR : DSPBADDR);

	int dspsurf = (pipe == 0 ? DSPASURF : DSPBSURF);

	int dspstride = (pipe == 0) ? DSPASTRIDE : DSPBSTRIDE;

	int dsptileoff = (pipe == 0 ? DSPATILEOFF : DSPBTILEOFF);

	int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;

	int dspbase = (plane == 0 ? DSPAADDR : DSPBADDR);

	int dspsurf = (plane == 0 ? DSPASURF : DSPBSURF);

	int dspstride = (plane == 0) ? DSPASTRIDE : DSPBSTRIDE;

	int dsptileoff = (plane == 0 ? DSPATILEOFF : DSPBTILEOFF);

	int dspcntr_reg = (plane == 0) ? DSPACNTR : DSPBCNTR;

	u32 dspcntr, alignment;

	int ret;
@@ -981,12 +1150,12 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y, 
		return 0;

	}



	switch (pipe) {

	switch (plane) {

	case 0:

	case 1:

		break;

	default:

		DRM_ERROR("Can't update pipe %d in SAREA\n", pipe);

		DRM_ERROR("Can't update plane %d in SAREA\n", plane);

		return -EINVAL;

	}
@@ -1114,6 +1283,9 @@ intel_pipe_set_base(struct drm_crtc *crtc, int x, int y, 
		master_priv->sarea_priv->pipeA_y = y;

	}



	if (I915_HAS_FBC(dev) && (IS_I965G(dev) || plane == 0))

		intel_update_fbc(crtc, &crtc->mode);



	return 0;

}
@@ -1534,9 +1706,10 @@ static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode) 
	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	int pipe = intel_crtc->pipe;

	int plane = intel_crtc->plane;

	int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;

	int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;

	int dspbase_reg = (pipe == 0) ? DSPAADDR : DSPBADDR;

	int dspcntr_reg = (plane == 0) ? DSPACNTR : DSPBCNTR;

	int dspbase_reg = (plane == 0) ? DSPAADDR : DSPBADDR;

	int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;

	u32 temp;
@@ -1579,6 +1752,9 @@ static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode) 


		intel_crtc_load_lut(crtc);



		if (I915_HAS_FBC(dev) && (IS_I965G(dev) || plane == 0))

			intel_update_fbc(crtc, &crtc->mode);



		/* Give the overlay scaler a chance to enable if it's on this pipe */

		//intel_crtc_dpms_video(crtc, true); TODO

		intel_update_watermarks(dev);
@@ -1588,6 +1764,9 @@ static void i9xx_crtc_dpms(struct drm_crtc *crtc, int mode) 
		/* Give the overlay scaler a chance to disable if it's on this pipe */

		//intel_crtc_dpms_video(crtc, FALSE); TODO



		if (dev_priv->cfb_plane == plane)

			i8xx_disable_fbc(dev);



		/* Disable the VGA plane that we never use */

		i915_disable_vga(dev);
@@ -2325,10 +2504,11 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc, 
	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

	int pipe = intel_crtc->pipe;

	int plane = intel_crtc->plane;

	int fp_reg = (pipe == 0) ? FPA0 : FPB0;

	int dpll_reg = (pipe == 0) ? DPLL_A : DPLL_B;

	int dpll_md_reg = (intel_crtc->pipe == 0) ? DPLL_A_MD : DPLL_B_MD;

	int dspcntr_reg = (pipe == 0) ? DSPACNTR : DSPBCNTR;

	int dspcntr_reg = (plane == 0) ? DSPACNTR : DSPBCNTR;

	int pipeconf_reg = (pipe == 0) ? PIPEACONF : PIPEBCONF;

	int htot_reg = (pipe == 0) ? HTOTAL_A : HTOTAL_B;

	int hblank_reg = (pipe == 0) ? HBLANK_A : HBLANK_B;
@@ -2336,8 +2516,8 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc, 
	int vtot_reg = (pipe == 0) ? VTOTAL_A : VTOTAL_B;

	int vblank_reg = (pipe == 0) ? VBLANK_A : VBLANK_B;

	int vsync_reg = (pipe == 0) ? VSYNC_A : VSYNC_B;

	int dspsize_reg = (pipe == 0) ? DSPASIZE : DSPBSIZE;

	int dsppos_reg = (pipe == 0) ? DSPAPOS : DSPBPOS;

	int dspsize_reg = (plane == 0) ? DSPASIZE : DSPBSIZE;

	int dsppos_reg = (plane == 0) ? DSPAPOS : DSPBPOS;

	int pipesrc_reg = (pipe == 0) ? PIPEASRC : PIPEBSRC;

	int refclk, num_outputs = 0;

	intel_clock_t clock, reduced_clock;
@@ -2570,7 +2750,7 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc, 
	   enable color space conversion */

	if (!IS_IGDNG(dev)) {

		if (pipe == 0)

			dspcntr |= DISPPLANE_SEL_PIPE_A;

			dspcntr &= ~DISPPLANE_SEL_PIPE_MASK;

		else

			dspcntr |= DISPPLANE_SEL_PIPE_B;

	}
@@ -2739,6 +2919,8 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc, 
	/* Flush the plane changes */

	ret = intel_pipe_set_base(crtc, x, y, old_fb);



	if (I915_HAS_FBC(dev) && (IS_I965G(dev) || plane == 0))

		intel_update_fbc(crtc, &crtc->mode);

	intel_update_watermarks(dev);



	drm_vblank_post_modeset(dev, pipe);
@@ -2783,6 +2965,7 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc, 
	struct drm_gem_object *bo;

	struct drm_i915_gem_object *obj_priv;

	int pipe = intel_crtc->pipe;

	int plane = intel_crtc->plane;

	uint32_t control = (pipe == 0) ? CURACNTR : CURBCNTR;

	uint32_t base = (pipe == 0) ? CURABASE : CURBBASE;

	uint32_t temp = I915_READ(control);
@@ -2868,6 +3051,10 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc, 
			i915_gem_object_unpin(intel_crtc->cursor_bo);

		drm_gem_object_unreference(intel_crtc->cursor_bo);

	}



	if (I915_HAS_FBC(dev) && (IS_I965G(dev) || plane == 0))

		intel_update_fbc(crtc, &crtc->mode);



	mutex_unlock(&dev->struct_mutex);



	intel_crtc->cursor_addr = addr;
@@ -3549,6 +3736,14 @@ static void intel_crtc_init(struct drm_device *dev, int pipe) 
		intel_crtc->lut_b[i] = i;

	}



	/* Swap pipes & planes for FBC on pre-965 */

	intel_crtc->pipe = pipe;

	intel_crtc->plane = pipe;

	if (IS_MOBILE(dev) && (IS_I9XX(dev) && !IS_I965G(dev))) {

		DRM_DEBUG("swapping pipes & planes for FBC\n");

		intel_crtc->plane = ((pipe == 0) ? 1 : 0);

	}



	intel_crtc->cursor_addr = 0;

	intel_crtc->dpms_mode = DRM_MODE_DPMS_OFF;

	drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
@@ -3909,6 +4104,7 @@ void intel_modeset_cleanup(struct drm_device *dev) 


	mutex_unlock(&dev->struct_mutex);



	i8xx_disable_fbc(dev);

	drm_mode_config_cleanup(dev);

}

drivers/gpu/drm/i915/intel_drv.h

+3 −2
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <linux/i2c.h>

#include <linux/i2c-id.h>

#include <linux/i2c-algo-bit.h>

#include "i915_drv.h"

#include "drm_crtc.h"



#include "drm_crtc_helper.h"
@@ -110,8 +111,8 @@ struct intel_output { 


struct intel_crtc {

	struct drm_crtc base;

	int pipe;

	int plane;

	enum pipe pipe;

	enum plane plane;

	struct drm_gem_object *cursor_bo;

	uint32_t cursor_addr;

	u8 lut_r[256], lut_g[256], lut_b[256];

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