gma500: allow non stolen page backed framebuffer

For Moorestown at least we may not have stolen RAM with which to back the
initial framebuffer. Allow a GEM backing.

At this point we should have all the bits in place needed to make it work once
it has been debugged.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/gma500/psb_fb.c b/drivers/staging/gma500/psb_fb.c
index f36e83f..ae097cd 100644 (file)
--- a/drivers/staging/gma500/psb_fb.c
+++ b/drivers/staging/gma500/psb_fb.c
@@ -335,6 +335,38 @@ err:
        return NULL;
 }
 
+/**
+ *     psbfb_alloc             -       allocate frame buffer memory
+ *     @dev: the DRM device
+ *     @aligned_size: space needed
+ *
+ *     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.
+ *
+ *     In this case the GEM object has no handle. 
+ */
+static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
+{
+       struct gtt_range *backing;
+       /* Begin by trying to use stolen memory backing */
+       backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1);
+       if (backing)
+               return 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;
+}
+       
 /**
  *     psbfb_create            -       create a framebuffer
  *     @fbdev: the framebuffer device
@@ -368,7 +400,7 @@ static int psbfb_create(struct psb_fbdev *fbdev,
        aligned_size = ALIGN(size, PAGE_SIZE);
 
        /* Allocate the framebuffer in the GTT with stolen page backing */
-       backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1);
+       backing = psbfb_alloc(dev, aligned_size);
        if (backing == NULL)
                return -ENOMEM;
 
@@ -523,7 +555,13 @@ int psb_fbdev_destroy(struct drm_device *dev, struct psb_fbdev *fbdev)
 
        if (fbdev->psb_fb_helper.fbdev) {
                info = fbdev->psb_fb_helper.fbdev;
-               psb_gtt_free_range(dev, psbfb->gtt);
+               /* FIXME: this is a bit more inside knowledge than I'd like
+                  but I don't see how to make a fake GEM object of the
+                  stolen space nicely */
+               if (psbfb->gtt->stolen)
+                       psb_gtt_free_range(dev, psbfb->gtt);
+               else
+                       drm_gem_object_unreference(&psbfb->gtt->gem);
                unregister_framebuffer(info);
                iounmap(info->screen_base);
                framebuffer_release(info);
@@ -571,7 +609,6 @@ void psb_fbdev_fini(struct drm_device *dev)
        dev_priv->fbdev = NULL;
 }
 
-
 static void psbfb_output_poll_changed(struct drm_device *dev)
 {
        struct drm_psb_private *dev_priv = dev->dev_private;

diff --git a/drivers/staging/gma500/psb_gem.c b/drivers/staging/gma500/psb_gem.c
index 0438bf4..d47c187 100644 (file)
--- a/drivers/staging/gma500/psb_gem.c
+++ b/drivers/staging/gma500/psb_gem.c
@@ -39,6 +39,8 @@ int psb_gem_init_object(struct drm_gem_object *obj)
 
 void psb_gem_free_object(struct drm_gem_object *obj)
 {
+       struct gtt_range *gtt = container_of(obj, struct gtt_range, gem);
+       psb_gtt_free_range(obj->dev, gtt);
        drm_gem_object_release(obj);
 }
 

diff --git a/drivers/staging/gma500/psb_gtt.c b/drivers/staging/gma500/psb_gtt.c
index a991c12..10d772a 100644 (file)
--- a/drivers/staging/gma500/psb_gtt.c
+++ b/drivers/staging/gma500/psb_gtt.c
@@ -298,7 +298,6 @@ struct gtt_range *psb_gtt_alloc_range(struct drm_device *dev, int len,
        return NULL;
 }
 
-
 static void psb_gtt_destroy(struct kref *kref)
 {
        struct gtt_range *gt = container_of(kref, struct gtt_range, kref);

diff --git a/drivers/staging/gma500/psb_intel_display.c b/drivers/staging/gma500/psb_intel_display.c
index b5a36d2..9e1446f 100644 (file)
--- a/drivers/staging/gma500/psb_intel_display.c
+++ b/drivers/staging/gma500/psb_intel_display.c
@@ -361,7 +361,13 @@ int psb_intel_pipe_set_base(struct drm_crtc *crtc,
        if (!gma_power_begin(dev, true))
                return 0;
 
+       /* We are displaying this buffer, make sure it is actually loaded
+          into the GTT */
+       ret = psb_gtt_pin(dev, psbfb->gtt);
+       if (ret < 0)
+               goto psb_intel_pipe_set_base_exit;
        start = psbfb->gtt->offset;
+
        offset = y * crtc->fb->pitch + x * (crtc->fb->bits_per_pixel / 8);
 
        REG_WRITE(dspstride, crtc->fb->pitch);
@@ -386,10 +392,12 @@ int psb_intel_pipe_set_base(struct drm_crtc *crtc,
        default:
                DRM_ERROR("Unknown color depth\n");
                ret = -EINVAL;
+               psb_gtt_unpin(dev, psbfb->gtt);
                goto psb_intel_pipe_set_base_exit;
        }
        REG_WRITE(dspcntr_reg, dspcntr);
 
+
        DRM_DEBUG("Writing base %08lX %08lX %d %d\n", start, offset, x, y);
        if (0 /* FIXMEAC - check what PSB needs */) {
                REG_WRITE(dspbase, offset);
@@ -401,10 +409,12 @@ int psb_intel_pipe_set_base(struct drm_crtc *crtc,
                REG_READ(dspbase);
        }
 
-psb_intel_pipe_set_base_exit:
+       /* If there was a previous display we can now unpin it */
+       if (old_fb)
+               psb_gtt_unpin(dev, to_psb_fb(old_fb)->gtt);
 
+psb_intel_pipe_set_base_exit:
        gma_power_end(dev);
-
        return ret;
 }
 
@@ -1037,7 +1047,7 @@ static int psb_intel_crtc_cursor_set(struct drm_crtc *crtc,
                /* turn off the cursor */
                temp = CURSOR_MODE_DISABLE;
 
-               if (gma_power_begin(dev, false)) {
+               if (gma_power_begin(dev, false)) {
                        REG_WRITE(control, temp);
                        REG_WRITE(base, 0);
                        gma_power_end(dev);
@@ -1045,8 +1055,8 @@ static int psb_intel_crtc_cursor_set(struct drm_crtc *crtc,
 
                /* Unpin the old GEM object */
                if (psb_intel_crtc->cursor_obj) {
-                       gt = container_of(psb_intel_crtc->cursor_obj,
-                                               struct gtt_range, gem);
+                       gt = container_of(psb_intel_crtc->cursor_obj,
+                                                       struct gtt_range, gem);
                        psb_gtt_unpin(crtc->dev, gt);
                        drm_gem_object_unreference(psb_intel_crtc->cursor_obj);
                        psb_intel_crtc->cursor_obj = NULL;
@@ -1089,7 +1099,7 @@ static int psb_intel_crtc_cursor_set(struct drm_crtc *crtc,
        temp |= (pipe << 28);
        temp |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
 
-               if (gma_power_begin(dev, false)) {
+       if (gma_power_begin(dev, false)) {
                REG_WRITE(control, temp);
                REG_WRITE(base, addr);
                gma_power_end(dev);
@@ -1097,8 +1107,8 @@ static int psb_intel_crtc_cursor_set(struct drm_crtc *crtc,
 
        /* unpin the old bo */
        if (psb_intel_crtc->cursor_obj && psb_intel_crtc->cursor_obj != obj) {
-                       gt = container_of(psb_intel_crtc->cursor_obj,
-                                               struct gtt_range, gem);
+               gt = container_of(psb_intel_crtc->cursor_obj,
+                                                       struct gtt_range, gem);
                psb_gtt_unpin(crtc->dev, gt);
                drm_gem_object_unreference(psb_intel_crtc->cursor_obj);
                psb_intel_crtc->cursor_obj = obj;
@@ -1130,7 +1140,7 @@ static int psb_intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 
        addr = psb_intel_crtc->cursor_addr;
 
-               if (gma_power_begin(dev, false)) {
+       if (gma_power_begin(dev, false)) {
                REG_WRITE((pipe == 0) ? CURAPOS : CURBPOS, temp);
                REG_WRITE((pipe == 0) ? CURABASE : CURBBASE, addr);
                gma_power_end(dev);
@@ -1183,7 +1193,7 @@ static int psb_intel_crtc_clock_get(struct drm_device *dev,
        bool is_lvds;
        struct drm_psb_private *dev_priv = dev->dev_private;
 
-               if (gma_power_begin(dev, false)) {
+       if (gma_power_begin(dev, false)) {
                dpll = REG_READ((pipe == 0) ? DPLL_A : DPLL_B);
                if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
                        fp = REG_READ((pipe == 0) ? FPA0 : FPB0);
@@ -1262,7 +1272,7 @@ struct drm_display_mode *psb_intel_crtc_mode_get(struct drm_device *dev,
        int vsync;
        struct drm_psb_private *dev_priv = dev->dev_private;
 
-               if (gma_power_begin(dev, false)) {
+       if (gma_power_begin(dev, false)) {
                htot = REG_READ((pipe == 0) ? HTOTAL_A : HTOTAL_B);
                hsync = REG_READ((pipe == 0) ? HSYNC_A : HSYNC_B);
                vtot = REG_READ((pipe == 0) ? VTOTAL_A : VTOTAL_B);
@@ -1387,10 +1397,10 @@ void psb_intel_crtc_init(struct drm_device *dev, int pipe,
        psb_intel_crtc->cursor_addr = 0;
 
        if (IS_MRST(dev))
-               drm_crtc_helper_add(&psb_intel_crtc->base,
+               drm_crtc_helper_add(&psb_intel_crtc->base,
                                    &mrst_helper_funcs);
        else
-               drm_crtc_helper_add(&psb_intel_crtc->base,
+               drm_crtc_helper_add(&psb_intel_crtc->base,
                                    &psb_intel_helper_funcs);
 
        /* Setup the array of drm_connector pointer array */