diff options
| -rw-r--r-- | drivers/gpu/drm/gma500/framebuffer.c | 80 | ||||
| -rw-r--r-- | drivers/gpu/drm/gma500/gtt.c | 51 | ||||
| -rw-r--r-- | drivers/gpu/drm/gma500/gtt.h | 3 |
3 files changed, 122 insertions, 12 deletions
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c index 867a047..652f1ec 100644 --- a/drivers/gpu/drm/gma500/framebuffer.c +++ b/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, @@ -306,6 +341,7 @@ 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 @@ -349,6 +385,7 @@ static int psbfb_create(struct psb_fbdev *fbdev, int ret; struct gtt_range *backing; u32 bpp, depth; + int gtt_roll = 1; mode_cmd.width = sizes->surface_width; mode_cmd.height = sizes->surface_height; @@ -358,17 +395,38 @@ 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); + /* Acceleration via the GTT requires pitch to be 4096 byte aligned + (ie 1024 or 2048 pixels in normal use) */ + mode_cmd.pitches[0] = ALIGN(mode_cmd.width * ((bpp + 7) / 8), 4096); depth = sizes->surface_depth; size = mode_cmd.pitches[0] * mode_cmd.height; size = ALIGN(size, PAGE_SIZE); - /* Allocate the framebuffer in the GTT with stolen page backing */ + /* Try and allocate with the alignment we need */ backing = psbfb_alloc(dev, size); - if (backing == NULL) - return -ENOMEM; + 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 + * + * FIXME: We could try alignments in a loop so that we can still + * accelerate power of two font sizes. + */ + + gtt_roll = 0; /* Don't use GTT accelerated scrolling */ + + 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); @@ -394,11 +452,13 @@ 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 (gtt_roll) { /* GTT rolling seems best */ + info->fbops = &psbfb_roll_ops; + info->flags |= FBINFO_HWACCEL_YPAN; + } else if (dev_priv->ops->accel_2d) /* 2D engine */ info->fbops = &psbfb_ops; + else /* Software */ + info->fbops = &psbfb_unaccel_ops; ret = fb_alloc_cmap(&info->cmap, 256, 0); if (ret) { @@ -408,6 +468,8 @@ 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; /* Accessed stolen memory directly */ info->screen_base = (char *)dev_priv->vram_addr + diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c index a246239..e770bd1 100644 --- a/drivers/gpu/drm/gma500/gtt.c +++ b/drivers/gpu/drm/gma500/gtt.c @@ -95,12 +95,17 @@ static int psb_gtt_insert(struct drm_device *dev, struct gtt_range *r) set_pages_array_uc(pages, r->npage); /* Write our page entries into the GTT itself */ - for (i = 0; i < r->npage; i++) { - pte = psb_gtt_mask_pte(page_to_pfn(*pages++), 0/*type*/); + for (i = r->roll; i < r->npage; i++) { + pte = psb_gtt_mask_pte(page_to_pfn(r->pages[i]), 0); + iowrite32(pte, gtt_slot++); + } + for (i = 0; i < r->roll; i++) { + pte = psb_gtt_mask_pte(page_to_pfn(r->pages[i]), 0); iowrite32(pte, gtt_slot++); } /* Make sure all the entries are set before we return */ ioread32(gtt_slot - 1); + return 0; } @@ -113,7 +118,6 @@ static int psb_gtt_insert(struct drm_device *dev, struct gtt_range *r) * page table entries with the dummy page. This is protected via the gtt * mutex which the caller must hold. */ - static void psb_gtt_remove(struct drm_device *dev, struct gtt_range *r) { struct drm_psb_private *dev_priv = dev->dev_private; @@ -132,6 +136,46 @@ static void psb_gtt_remove(struct drm_device *dev, struct gtt_range *r) } /** + * psb_gtt_roll - set scrolling position + * @dev: our DRM device + * @r: the gtt mapping we are using + * @roll: roll offset + * + * Roll an existing pinned mapping by moving the pages through the GTT. + * This allows us to implement hardware scrolling on the consoles without + * a 2D engine + */ +void psb_gtt_roll(struct drm_device *dev, struct gtt_range *r, int roll) +{ + u32 *gtt_slot, pte; + int i; + + if (roll >= r->npage) { + WARN_ON(1); + return; + } + + r->roll = roll; + + /* Not currently in the GTT - no worry we will write the mapping at + the right position when it gets pinned */ + if (!r->stolen && !r->in_gart) + return; + + gtt_slot = psb_gtt_entry(dev, r); + + for (i = r->roll; i < r->npage; i++) { + pte = psb_gtt_mask_pte(page_to_pfn(r->pages[i]), 0); + iowrite32(pte, gtt_slot++); + } + for (i = 0; i < r->roll; i++) { + pte = psb_gtt_mask_pte(page_to_pfn(r->pages[i]), 0); + iowrite32(pte, gtt_slot++); + } + ioread32(gtt_slot - 1); +} + +/** * psb_gtt_attach_pages - attach and pin GEM pages * @gt: the gtt range * @@ -302,6 +346,7 @@ struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, gt->resource.name = name; gt->stolen = backed; gt->in_gart = backed; + gt->roll = 0; /* Ensure this is set for non GEM objects */ gt->gem.dev = dev; ret = allocate_resource(dev_priv->gtt_mem, >->resource, diff --git a/drivers/gpu/drm/gma500/gtt.h b/drivers/gpu/drm/gma500/gtt.h index e0e1cb6..aa17423 100644 --- a/drivers/gpu/drm/gma500/gtt.h +++ b/drivers/gpu/drm/gma500/gtt.h @@ -49,6 +49,7 @@ struct gtt_range { bool mmapping; /* Is mmappable */ struct page **pages; /* Backing pages if present */ int npage; /* Number of backing pages */ + int roll; /* Roll applied to the GTT entries */ }; extern struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len, @@ -57,5 +58,7 @@ extern void psb_gtt_kref_put(struct gtt_range *gt); extern void psb_gtt_free_range(struct drm_device *dev, struct gtt_range *gt); extern int psb_gtt_pin(struct gtt_range *gt); extern void psb_gtt_unpin(struct gtt_range *gt); +extern void psb_gtt_roll(struct drm_device *dev, + struct gtt_range *gt, int roll); #endif |
