drm: Merge branch 'drm-gma500-alancox' into drm-core-next

This merges a topic branch containing patches from Alan for the GMA500 driver.

* drm-gma500-alancox:
  gma500: Oaktrail BIOS handling
  gma500: Fix oaktrail probing part 1
  gma500: Be smarter about layout
  gma500: gtt based hardware scrolling console
  gma500: frame buffer locking
  gma500: Fix backlight crash
  gma500: kill bogus code
  gma500: Convert spaces to tabs in accel_2d.c.
  gma500: do a pass over the FIXME tags
  gma500: Add VBLANK support for Poulsbo hardware
  gma500: Don't enable MSI on Poulsbo
  gma500: Only register interrupt handler for poulsbo hardware
  gma500: kill virtual mapping support
  gma500: Move the API
  gma500: kill off NUM_PIPE define
  gma500: Rename the ioctls to avoid clashing with the legacy drivers
  drm/gma500: begin pruning dead bits of API

drivers/gpu/drm/gma500/accel_2d.c

@@ -111,14 +111,15 @@ static int psbfb_2d_submit(struct drm_psb_private *dev_priv, uint32_t *cmdbuf,
 	int ret = 0;
 	int i;
 	unsigned submit_size;
+	unsigned long flags;
 
-	mutex_lock(&dev_priv->mutex_2d);
+	spin_lock_irqsave(&dev_priv->lock_2d, flags);
 	while (size > 0) {
 		submit_size = (size < 0x60) ? size : 0x60;
 		size -= submit_size;
 		ret = psb_2d_wait_available(dev_priv, submit_size);
 		if (ret)
-		        break;
+			break;
 
 		submit_size <<= 2;
 
@@ -127,7 +128,7 @@ static int psbfb_2d_submit(struct drm_psb_private *dev_priv, uint32_t *cmdbuf,
 
 		(void)PSB_RSGX32(PSB_SGX_2D_SLAVE_PORT + i - 4);
 	}
-	mutex_unlock(&dev_priv->mutex_2d);
+	spin_unlock_irqrestore(&dev_priv->lock_2d, flags);
 	return ret;
 }
 
@@ -327,8 +328,9 @@ int psbfb_sync(struct fb_info *info)
 	struct drm_psb_private *dev_priv = dev->dev_private;
 	unsigned long _end = jiffies + DRM_HZ;
 	int busy = 0;
+	unsigned long flags;
 
-	mutex_lock(&dev_priv->mutex_2d);
+	spin_lock_irqsave(&dev_priv->lock_2d, flags);
 	/*
 	 * First idle the 2D engine.
 	 */
@@ -357,6 +359,6 @@ int psbfb_sync(struct fb_info *info)
 					_PSB_C2B_STATUS_BUSY) != 0);
 
 out:
-	mutex_unlock(&dev_priv->mutex_2d);
+	spin_unlock_irqrestore(&dev_priv->lock_2d, flags);
 	return (busy) ? -EBUSY : 0;
 }

drivers/gpu/drm/gma500/cdv_device.c

@@ -20,7 +20,7 @@
 #include <linux/backlight.h>
 #include <drm/drmP.h>
 #include <drm/drm.h>
-#include "psb_drm.h"
+#include "gma_drm.h"
 #include "psb_drv.h"
 #include "psb_reg.h"
 #include "psb_intel_reg.h"
@@ -30,7 +30,6 @@
 #define VGA_SR_INDEX		0x3c4
 #define VGA_SR_DATA		0x3c5
 
-/* FIXME: should check if we are the active VGA device ?? */
 static void cdv_disable_vga(struct drm_device *dev)
 {
 	u8 sr1;

drivers/gpu/drm/gma500/framebuffer.c

@@ -38,6 +38,7 @@
 #include "psb_intel_reg.h"
 #include "psb_intel_drv.h"
 #include "framebuffer.h"
+#include "gtt.h"
 
 static void psb_user_framebuffer_destroy(struct drm_framebuffer *fb);
 static int psb_user_framebuffer_create_handle(struct drm_framebuffer *fb,
@@ -90,6 +91,25 @@ static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 	return 0;
 }
 
+static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct psb_fbdev *fbdev = info->par;
+	struct psb_framebuffer *psbfb = &fbdev->pfb;
+	struct drm_device *dev = psbfb->base.dev;
+
+	/*
+	 *	We have to poke our nose in here. The core fb code assumes
+	 *	panning is part of the hardware that can be invoked before
+	 *	the actual fb is mapped. In our case that isn't quite true.
+	 */
+	if (psbfb->gtt->npage) {
+		/* GTT roll shifts in 4K pages, we need to shift the right
+		   number of pages */
+		int pages = info->fix.line_length >> 12;
+		psb_gtt_roll(dev, psbfb->gtt, var->yoffset * pages);
+	}
+        return 0;
+}
 
 void psbfb_suspend(struct drm_device *dev)
 {
@@ -216,6 +236,21 @@ static struct fb_ops psbfb_ops = {
 	.fb_ioctl = psbfb_ioctl,
 };
 
+static struct fb_ops psbfb_roll_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = drm_fb_helper_check_var,
+	.fb_set_par = drm_fb_helper_set_par,
+	.fb_blank = drm_fb_helper_blank,
+	.fb_setcolreg = psbfb_setcolreg,
+	.fb_fillrect = cfb_fillrect,
+	.fb_copyarea = cfb_copyarea,
+	.fb_imageblit = cfb_imageblit,
+	.fb_pan_display = psbfb_pan,
+	.fb_mmap = psbfb_mmap,
+	.fb_sync = psbfb_sync,
+	.fb_ioctl = psbfb_ioctl,
+};
+
 static struct fb_ops psbfb_unaccel_ops = {
 	.owner = THIS_MODULE,
 	.fb_check_var = drm_fb_helper_check_var,
@@ -306,16 +341,14 @@ static struct drm_framebuffer *psb_framebuffer_create
  *	psbfb_alloc		-	allocate frame buffer memory
  *	@dev: the DRM device
  *	@aligned_size: space needed
+ *	@force: fall back to GEM buffers if need be
  *
  *	Allocate the frame buffer. In the usual case we get a GTT range that
  *	is stolen memory backed and life is simple. If there isn't sufficient
- *	stolen memory or the system has no stolen memory we allocate a range
- *	and back it with a GEM object.
+ *	we fail as we don't have the virtual mapping space to really vmap it
+ *	and the kernel console code can't handle non linear framebuffers.
  *
- *	In this case the GEM object has no handle.
- *
- *	FIXME: console speed up - allocate twice the space if room and use
- *	hardware scrolling for acceleration.
+ *	Re-address this as and if the framebuffer layer grows this ability.
  */
 static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
 {
@@ -328,17 +361,7 @@ static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
 			return backing;
 		psb_gtt_free_range(dev, backing);
 	}
-	/* Next try using GEM host memory */
-	backing = psb_gtt_alloc_range(dev, aligned_size, "fb(gem)", 0);
-	if (backing == NULL)
-		return NULL;
-
-	/* Now back it with an object */
-	if (drm_gem_object_init(dev, &backing->gem, aligned_size) != 0) {
-		psb_gtt_free_range(dev, backing);
-		return NULL;
-	}
-	return backing;
+	return NULL;
 }
 
 /**
@@ -362,6 +385,8 @@ static int psbfb_create(struct psb_fbdev *fbdev,
 	int ret;
 	struct gtt_range *backing;
 	u32 bpp, depth;
+	int gtt_roll = 0;
+	int pitch_lines = 0;
 
 	mode_cmd.width = sizes->surface_width;
 	mode_cmd.height = sizes->surface_height;
@@ -371,17 +396,51 @@ static int psbfb_create(struct psb_fbdev *fbdev,
 	if (bpp == 24)
 		bpp = 32;
 
-	/* HW requires pitch to be 64 byte aligned */
-	mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
-	depth = sizes->surface_depth;
+	do {
+		/*
+		 * Acceleration via the GTT requires pitch to be
+		 * power of two aligned. Preferably page but less
+		 * is ok with some fonts
+		 */
+        	mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096 >> pitch_lines);
+        	depth = sizes->surface_depth;
 
-	size = mode_cmd.pitches[0] * mode_cmd.height;
-	size = ALIGN(size, PAGE_SIZE);
+        	size = mode_cmd.pitches[0] * mode_cmd.height;
+        	size = ALIGN(size, PAGE_SIZE);
 
-	/* Allocate the framebuffer in the GTT with stolen page backing */
-	backing = psbfb_alloc(dev, size);
-	if (backing == NULL)
-		return -ENOMEM;
+		/* Allocate the fb in the GTT with stolen page backing */
+		backing = psbfb_alloc(dev, size);
+
+		if (pitch_lines)
+			pitch_lines *= 2;
+		else
+			pitch_lines = 1;
+		gtt_roll++;
+	} while (backing == NULL && pitch_lines <= 16);
+
+	/* The final pitch we accepted if we succeeded */
+	pitch_lines /= 2;
+
+	if (backing == NULL) {
+		/*
+		 *	We couldn't get the space we wanted, fall back to the
+		 *	display engine requirement instead.  The HW requires
+		 *	the pitch to be 64 byte aligned
+		 */
+
+		gtt_roll = 0;	/* Don't use GTT accelerated scrolling */
+		pitch_lines = 64;
+
+		mode_cmd.pitches[0] =  ALIGN(mode_cmd.width * ((bpp + 7) / 8), 64);
+
+		size = mode_cmd.pitches[0] * mode_cmd.height;
+		size = ALIGN(size, PAGE_SIZE);
+
+		/* Allocate the framebuffer in the GTT with stolen page backing */
+		backing = psbfb_alloc(dev, size);
+		if (backing == NULL)
+			return -ENOMEM;
+	}
 
 	mutex_lock(&dev->struct_mutex);
 
@@ -407,11 +466,13 @@ static int psbfb_create(struct psb_fbdev *fbdev,
 	strcpy(info->fix.id, "psbfb");
 
 	info->flags = FBINFO_DEFAULT;
-	/* No 2D engine */
-	if (!dev_priv->ops->accel_2d)
-		info->fbops = &psbfb_unaccel_ops;
-	else
+	if (dev_priv->ops->accel_2d && pitch_lines > 8)	/* 2D engine */
 		info->fbops = &psbfb_ops;
+	else if (gtt_roll) {	/* GTT rolling seems best */
+		info->fbops = &psbfb_roll_ops;
+		info->flags |= FBINFO_HWACCEL_YPAN;
+	} else	/* Software */
+		info->fbops = &psbfb_unaccel_ops;
 
 	ret = fb_alloc_cmap(&info->cmap, 256, 0);
 	if (ret) {
@@ -421,23 +482,12 @@ static int psbfb_create(struct psb_fbdev *fbdev,
 
 	info->fix.smem_start = dev->mode_config.fb_base;
 	info->fix.smem_len = size;
+	info->fix.ywrapstep = gtt_roll;
+	info->fix.ypanstep = 0;
 
-	if (backing->stolen) {
-		/* Accessed stolen memory directly */
-		info->screen_base = (char *)dev_priv->vram_addr +
+	/* Accessed stolen memory directly */
+	info->screen_base = (char *)dev_priv->vram_addr +
 							backing->offset;
-	} else {
-		/* Pin the pages into the GTT and create a mapping to them */
-		psb_gtt_pin(backing);
-		info->screen_base = vm_map_ram(backing->pages, backing->npage,
-				-1, PAGE_KERNEL);
-		if (info->screen_base == NULL) {
-			psb_gtt_unpin(backing);
-			ret = -ENOMEM;
-			goto out_unref;
-		}
-		psbfb->vm_map = 1;
-	}
 	info->screen_size = size;
 
 	if (dev_priv->gtt.stolen_size) {
@@ -471,11 +521,8 @@ static int psbfb_create(struct psb_fbdev *fbdev,
 out_unref:
 	if (backing->stolen)
 		psb_gtt_free_range(dev, backing);
-	else {
-		if (psbfb->vm_map)
-			vm_unmap_ram(info->screen_base, backing->npage);
+	else
 		drm_gem_object_unreference(&backing->gem);
-	}
 out_err1:
 	mutex_unlock(&dev->struct_mutex);
 	psb_gtt_free_range(dev, backing);
@@ -549,13 +596,6 @@ int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
 
 	if (fbdev->psb_fb_helper.fbdev) {
 		info = fbdev->psb_fb_helper.fbdev;
-
-		/* If this is our base framebuffer then kill any virtual map
-		   for the framebuffer layer and unpin it */
-		if (psbfb->vm_map) {
-			vm_unmap_ram(info->screen_base, psbfb->gtt->npage);
-			psb_gtt_unpin(psbfb->gtt);
-		}
 		unregister_framebuffer(info);
 		if (info->cmap.len)
 			fb_dealloc_cmap(&info->cmap);
@@ -765,7 +805,7 @@ void psb_modeset_init(struct drm_device *dev)
 	dev->mode_config.funcs = (void *) &psb_mode_funcs;
 
 	/* set memory base */
-	/* MRST and PSB should use BAR 2*/
+	/* Oaktrail and Poulsbo should use BAR 2*/
 	pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
 					&(dev->mode_config.fb_base));
 

drivers/gpu/drm/gma500/framebuffer.h

@@ -32,7 +32,6 @@ struct psb_framebuffer {
 	struct address_space *addr_space;
 	struct fb_info *fbdev;
 	struct gtt_range *gtt;
-	bool vm_map;		/* True if we must undo a vm_map_ram */
 };
 
 struct psb_fbdev {

drivers/gpu/drm/gma500/gem.c

@@ -25,7 +25,7 @@
 
 #include <drm/drmP.h>
 #include <drm/drm.h>
-#include "psb_drm.h"
+#include "gma_drm.h"
 #include "psb_drv.h"
 
 int psb_gem_init_object(struct drm_gem_object *obj)
@@ -120,8 +120,7 @@ static int psb_gem_create(struct drm_file *file,
 	/* Initialize the extra goodies GEM needs to do all the hard work */
 	if (drm_gem_object_init(dev, &r->gem, size) != 0) {
 		psb_gtt_free_range(dev, r);
-		/* GEM doesn't give an error code and we don't have an
-		   EGEMSUCKS so make something up for now - FIXME */
+		/* GEM doesn't give an error code so use -ENOMEM */
 		dev_err(dev->dev, "GEM init failed for %lld\n", size);
 		return -ENOMEM;
 	}
@@ -191,8 +190,6 @@ int psb_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
  *	The VMA was set up by GEM. In doing so it also ensured that the
  *	vma->vm_private_data points to the GEM object that is backing this
  *	mapping.
- *
- *	FIXME
  */
 int psb_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
@@ -274,13 +271,13 @@ int psb_gem_create_ioctl(struct drm_device *dev, void *data,
 {
 	struct drm_psb_gem_create *args = data;
 	int ret;
-	if (args->flags & PSB_GEM_CREATE_STOLEN) {
+	if (args->flags & GMA_GEM_CREATE_STOLEN) {
 		ret = psb_gem_create_stolen(file, dev, args->size,
 							&args->handle);
 		if (ret == 0)
 			return 0;
 		/* Fall throguh */
-		args->flags &= ~PSB_GEM_CREATE_STOLEN;
+		args->flags &= ~GMA_GEM_CREATE_STOLEN;
 	}
 	return psb_gem_create(file, dev, args->size, &args->handle);
 }