From 9886eb59f86b20bd35a96ce9c6d70aac50ed3a39 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 19 Apr 2011 15:28:45 +0100 Subject: [PATCH] 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 Signed-off-by: Greg Kroah-Hartman --- drivers/staging/gma500/psb_fb.c | 43 ++++++++++++++++++++-- drivers/staging/gma500/psb_gem.c | 2 + drivers/staging/gma500/psb_gtt.c | 1 - drivers/staging/gma500/psb_intel_display.c | 36 +++++++++++------- 4 files changed, 65 insertions(+), 17 deletions(-) diff --git a/drivers/staging/gma500/psb_fb.c b/drivers/staging/gma500/psb_fb.c index f36e83f1d8e5..ae097cd883f5 100644 --- 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 0438bf4f28e5..d47c187f1650 100644 --- 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 a991c12315ce..10d772aa802c 100644 --- 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 b5a36d20d0ba..9e1446f8af8b 100644 --- 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 */ -- 2.20.1