#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,
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)
{
.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,
* 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
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;
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);
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) {
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 +
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;
}
* 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;
set_pages_array_wb(r->pages, r->npage);
}
+/**
+ * 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
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,
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