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path: root/drivers/gpu/drm/gma500/framebuffer.c
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Diffstat (limited to 'drivers/gpu/drm/gma500/framebuffer.c')
-rw-r--r--drivers/gpu/drm/gma500/framebuffer.c658
1 files changed, 658 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
new file mode 100644
index 000000000..6ef4ea07d
--- /dev/null
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -0,0 +1,658 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**************************************************************************
+ * Copyright (c) 2007-2011, Intel Corporation.
+ * All Rights Reserved.
+ *
+ **************************************************************************/
+
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/pfn_t.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/tty.h>
+
+#include <drm/drm.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+
+#include "framebuffer.h"
+#include "gtt.h"
+#include "psb_drv.h"
+#include "psb_intel_drv.h"
+#include "psb_intel_reg.h"
+
+static const struct drm_framebuffer_funcs psb_fb_funcs = {
+ .destroy = drm_gem_fb_destroy,
+ .create_handle = drm_gem_fb_create_handle,
+};
+
+#define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
+
+static int psbfb_setcolreg(unsigned regno, unsigned red, unsigned green,
+ unsigned blue, unsigned transp,
+ struct fb_info *info)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+ struct drm_framebuffer *fb = fb_helper->fb;
+ uint32_t v;
+
+ if (!fb)
+ return -ENOMEM;
+
+ if (regno > 255)
+ return 1;
+
+ red = CMAP_TOHW(red, info->var.red.length);
+ blue = CMAP_TOHW(blue, info->var.blue.length);
+ green = CMAP_TOHW(green, info->var.green.length);
+ transp = CMAP_TOHW(transp, info->var.transp.length);
+
+ v = (red << info->var.red.offset) |
+ (green << info->var.green.offset) |
+ (blue << info->var.blue.offset) |
+ (transp << info->var.transp.offset);
+
+ if (regno < 16) {
+ switch (fb->format->cpp[0] * 8) {
+ case 16:
+ ((uint32_t *) info->pseudo_palette)[regno] = v;
+ break;
+ case 24:
+ case 32:
+ ((uint32_t *) info->pseudo_palette)[regno] = v;
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int psbfb_pan(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+ struct drm_framebuffer *fb = fb_helper->fb;
+ struct drm_device *dev = fb->dev;
+ struct gtt_range *gtt = to_gtt_range(fb->obj[0]);
+
+ /*
+ * 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 (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, gtt, var->yoffset * pages);
+ }
+ return 0;
+}
+
+static vm_fault_t psbfb_vm_fault(struct vm_fault *vmf)
+{
+ struct vm_area_struct *vma = vmf->vma;
+ struct drm_framebuffer *fb = vma->vm_private_data;
+ struct drm_device *dev = fb->dev;
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct gtt_range *gtt = to_gtt_range(fb->obj[0]);
+ int page_num;
+ int i;
+ unsigned long address;
+ vm_fault_t ret = VM_FAULT_SIGBUS;
+ unsigned long pfn;
+ unsigned long phys_addr = (unsigned long)dev_priv->stolen_base +
+ gtt->offset;
+
+ page_num = vma_pages(vma);
+ address = vmf->address - (vmf->pgoff << PAGE_SHIFT);
+
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+ for (i = 0; i < page_num; i++) {
+ pfn = (phys_addr >> PAGE_SHIFT);
+
+ ret = vmf_insert_mixed(vma, address,
+ __pfn_to_pfn_t(pfn, PFN_DEV));
+ if (unlikely(ret & VM_FAULT_ERROR))
+ break;
+ address += PAGE_SIZE;
+ phys_addr += PAGE_SIZE;
+ }
+ return ret;
+}
+
+static void psbfb_vm_open(struct vm_area_struct *vma)
+{
+}
+
+static void psbfb_vm_close(struct vm_area_struct *vma)
+{
+}
+
+static const struct vm_operations_struct psbfb_vm_ops = {
+ .fault = psbfb_vm_fault,
+ .open = psbfb_vm_open,
+ .close = psbfb_vm_close
+};
+
+static int psbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+ struct drm_framebuffer *fb = fb_helper->fb;
+
+ if (vma->vm_pgoff != 0)
+ return -EINVAL;
+ if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
+ return -EINVAL;
+
+ /*
+ * If this is a GEM object then info->screen_base is the virtual
+ * kernel remapping of the object. FIXME: Review if this is
+ * suitable for our mmap work
+ */
+ vma->vm_ops = &psbfb_vm_ops;
+ vma->vm_private_data = (void *)fb;
+ vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP;
+ return 0;
+}
+
+static const struct fb_ops psbfb_ops = {
+ .owner = THIS_MODULE,
+ DRM_FB_HELPER_DEFAULT_OPS,
+ .fb_setcolreg = psbfb_setcolreg,
+ .fb_fillrect = drm_fb_helper_cfb_fillrect,
+ .fb_copyarea = psbfb_copyarea,
+ .fb_imageblit = drm_fb_helper_cfb_imageblit,
+ .fb_mmap = psbfb_mmap,
+ .fb_sync = psbfb_sync,
+};
+
+static const struct fb_ops psbfb_roll_ops = {
+ .owner = THIS_MODULE,
+ DRM_FB_HELPER_DEFAULT_OPS,
+ .fb_setcolreg = psbfb_setcolreg,
+ .fb_fillrect = drm_fb_helper_cfb_fillrect,
+ .fb_copyarea = drm_fb_helper_cfb_copyarea,
+ .fb_imageblit = drm_fb_helper_cfb_imageblit,
+ .fb_pan_display = psbfb_pan,
+ .fb_mmap = psbfb_mmap,
+};
+
+static const struct fb_ops psbfb_unaccel_ops = {
+ .owner = THIS_MODULE,
+ DRM_FB_HELPER_DEFAULT_OPS,
+ .fb_setcolreg = psbfb_setcolreg,
+ .fb_fillrect = drm_fb_helper_cfb_fillrect,
+ .fb_copyarea = drm_fb_helper_cfb_copyarea,
+ .fb_imageblit = drm_fb_helper_cfb_imageblit,
+ .fb_mmap = psbfb_mmap,
+};
+
+/**
+ * psb_framebuffer_init - initialize a framebuffer
+ * @dev: our DRM device
+ * @fb: framebuffer to set up
+ * @mode_cmd: mode description
+ * @gt: backing object
+ *
+ * Configure and fill in the boilerplate for our frame buffer. Return
+ * 0 on success or an error code if we fail.
+ */
+static int psb_framebuffer_init(struct drm_device *dev,
+ struct drm_framebuffer *fb,
+ const struct drm_mode_fb_cmd2 *mode_cmd,
+ struct drm_gem_object *obj)
+{
+ const struct drm_format_info *info;
+ int ret;
+
+ /*
+ * Reject unknown formats, YUV formats, and formats with more than
+ * 4 bytes per pixel.
+ */
+ info = drm_get_format_info(dev, mode_cmd);
+ if (!info || !info->depth || info->cpp[0] > 4)
+ return -EINVAL;
+
+ if (mode_cmd->pitches[0] & 63)
+ return -EINVAL;
+
+ drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
+ fb->obj[0] = obj;
+ ret = drm_framebuffer_init(dev, fb, &psb_fb_funcs);
+ if (ret) {
+ dev_err(dev->dev, "framebuffer init failed: %d\n", ret);
+ return ret;
+ }
+ return 0;
+}
+
+/**
+ * psb_framebuffer_create - create a framebuffer backed by gt
+ * @dev: our DRM device
+ * @mode_cmd: the description of the requested mode
+ * @gt: the backing object
+ *
+ * Create a framebuffer object backed by the gt, and fill in the
+ * boilerplate required
+ *
+ * TODO: review object references
+ */
+
+static struct drm_framebuffer *psb_framebuffer_create
+ (struct drm_device *dev,
+ const struct drm_mode_fb_cmd2 *mode_cmd,
+ struct drm_gem_object *obj)
+{
+ struct drm_framebuffer *fb;
+ int ret;
+
+ fb = kzalloc(sizeof(*fb), GFP_KERNEL);
+ if (!fb)
+ return ERR_PTR(-ENOMEM);
+
+ ret = psb_framebuffer_init(dev, fb, mode_cmd, obj);
+ if (ret) {
+ kfree(fb);
+ return ERR_PTR(ret);
+ }
+ return fb;
+}
+
+/**
+ * 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
+ * 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.
+ *
+ * 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)
+{
+ struct gtt_range *backing;
+ /* Begin by trying to use stolen memory backing */
+ backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1, PAGE_SIZE);
+ if (backing) {
+ drm_gem_private_object_init(dev, &backing->gem, aligned_size);
+ return backing;
+ }
+ return NULL;
+}
+
+/**
+ * psbfb_create - create a framebuffer
+ * @fbdev: the framebuffer device
+ * @sizes: specification of the layout
+ *
+ * Create a framebuffer to the specifications provided
+ */
+static int psbfb_create(struct drm_fb_helper *fb_helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct drm_device *dev = fb_helper->dev;
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct fb_info *info;
+ struct drm_framebuffer *fb;
+ struct drm_mode_fb_cmd2 mode_cmd;
+ int size;
+ 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;
+ bpp = sizes->surface_bpp;
+ depth = sizes->surface_depth;
+
+ /* No 24bit packed */
+ if (bpp == 24)
+ bpp = 32;
+
+ 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);
+
+ size = mode_cmd.pitches[0] * mode_cmd.height;
+ size = ALIGN(size, PAGE_SIZE);
+
+ /* 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;
+ }
+
+ memset(dev_priv->vram_addr + backing->offset, 0, size);
+
+ info = drm_fb_helper_alloc_fbi(fb_helper);
+ if (IS_ERR(info)) {
+ ret = PTR_ERR(info);
+ goto out;
+ }
+
+ mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
+
+ fb = psb_framebuffer_create(dev, &mode_cmd, &backing->gem);
+ if (IS_ERR(fb)) {
+ ret = PTR_ERR(fb);
+ goto out;
+ }
+
+ fb_helper->fb = fb;
+
+ 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;
+
+ 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 = dev_priv->vram_addr + backing->offset;
+ info->screen_size = size;
+
+ if (dev_priv->gtt.stolen_size) {
+ info->apertures->ranges[0].base = dev->mode_config.fb_base;
+ info->apertures->ranges[0].size = dev_priv->gtt.stolen_size;
+ }
+
+ drm_fb_helper_fill_info(info, fb_helper, sizes);
+
+ info->fix.mmio_start = pci_resource_start(dev->pdev, 0);
+ info->fix.mmio_len = pci_resource_len(dev->pdev, 0);
+
+ /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
+
+ dev_dbg(dev->dev, "allocated %dx%d fb\n", fb->width, fb->height);
+
+ return 0;
+out:
+ psb_gtt_free_range(dev, backing);
+ return ret;
+}
+
+/**
+ * psb_user_framebuffer_create - create framebuffer
+ * @dev: our DRM device
+ * @filp: client file
+ * @cmd: mode request
+ *
+ * Create a new framebuffer backed by a userspace GEM object
+ */
+static struct drm_framebuffer *psb_user_framebuffer_create
+ (struct drm_device *dev, struct drm_file *filp,
+ const struct drm_mode_fb_cmd2 *cmd)
+{
+ struct drm_gem_object *obj;
+ struct drm_framebuffer *fb;
+
+ /*
+ * Find the GEM object and thus the gtt range object that is
+ * to back this space
+ */
+ obj = drm_gem_object_lookup(filp, cmd->handles[0]);
+ if (obj == NULL)
+ return ERR_PTR(-ENOENT);
+
+ /* Let the core code do all the work */
+ fb = psb_framebuffer_create(dev, cmd, obj);
+ if (IS_ERR(fb))
+ drm_gem_object_put(obj);
+
+ return fb;
+}
+
+static int psbfb_probe(struct drm_fb_helper *fb_helper,
+ struct drm_fb_helper_surface_size *sizes)
+{
+ struct drm_device *dev = fb_helper->dev;
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ unsigned int fb_size;
+ int bytespp;
+
+ bytespp = sizes->surface_bpp / 8;
+ if (bytespp == 3) /* no 24bit packed */
+ bytespp = 4;
+
+ /* If the mode will not fit in 32bit then switch to 16bit to get
+ a console on full resolution. The X mode setting server will
+ allocate its own 32bit GEM framebuffer */
+ fb_size = ALIGN(sizes->surface_width * bytespp, 64) *
+ sizes->surface_height;
+ fb_size = ALIGN(fb_size, PAGE_SIZE);
+
+ if (fb_size > dev_priv->vram_stolen_size) {
+ sizes->surface_bpp = 16;
+ sizes->surface_depth = 16;
+ }
+
+ return psbfb_create(fb_helper, sizes);
+}
+
+static const struct drm_fb_helper_funcs psb_fb_helper_funcs = {
+ .fb_probe = psbfb_probe,
+};
+
+static int psb_fbdev_destroy(struct drm_device *dev,
+ struct drm_fb_helper *fb_helper)
+{
+ struct drm_framebuffer *fb = fb_helper->fb;
+
+ drm_fb_helper_unregister_fbi(fb_helper);
+
+ drm_fb_helper_fini(fb_helper);
+ drm_framebuffer_unregister_private(fb);
+ drm_framebuffer_cleanup(fb);
+
+ if (fb->obj[0])
+ drm_gem_object_put(fb->obj[0]);
+ kfree(fb);
+
+ return 0;
+}
+
+int psb_fbdev_init(struct drm_device *dev)
+{
+ struct drm_fb_helper *fb_helper;
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ int ret;
+
+ fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
+ if (!fb_helper) {
+ dev_err(dev->dev, "no memory\n");
+ return -ENOMEM;
+ }
+
+ dev_priv->fb_helper = fb_helper;
+
+ drm_fb_helper_prepare(dev, fb_helper, &psb_fb_helper_funcs);
+
+ ret = drm_fb_helper_init(dev, fb_helper);
+ if (ret)
+ goto free;
+
+ /* disable all the possible outputs/crtcs before entering KMS mode */
+ drm_helper_disable_unused_functions(dev);
+
+ ret = drm_fb_helper_initial_config(fb_helper, 32);
+ if (ret)
+ goto fini;
+
+ return 0;
+
+fini:
+ drm_fb_helper_fini(fb_helper);
+free:
+ kfree(fb_helper);
+ return ret;
+}
+
+static void psb_fbdev_fini(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+
+ if (!dev_priv->fb_helper)
+ return;
+
+ psb_fbdev_destroy(dev, dev_priv->fb_helper);
+ kfree(dev_priv->fb_helper);
+ dev_priv->fb_helper = NULL;
+}
+
+static const struct drm_mode_config_funcs psb_mode_funcs = {
+ .fb_create = psb_user_framebuffer_create,
+ .output_poll_changed = drm_fb_helper_output_poll_changed,
+};
+
+static void psb_setup_outputs(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct drm_connector *connector;
+
+ drm_mode_create_scaling_mode_property(dev);
+
+ /* It is ok for this to fail - we just don't get backlight control */
+ if (!dev_priv->backlight_property)
+ dev_priv->backlight_property = drm_property_create_range(dev, 0,
+ "backlight", 0, 100);
+ dev_priv->ops->output_init(dev);
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list,
+ head) {
+ struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
+ struct drm_encoder *encoder = &gma_encoder->base;
+ int crtc_mask = 0, clone_mask = 0;
+
+ /* valid crtcs */
+ switch (gma_encoder->type) {
+ case INTEL_OUTPUT_ANALOG:
+ crtc_mask = (1 << 0);
+ clone_mask = (1 << INTEL_OUTPUT_ANALOG);
+ break;
+ case INTEL_OUTPUT_SDVO:
+ crtc_mask = dev_priv->ops->sdvo_mask;
+ clone_mask = 0;
+ break;
+ case INTEL_OUTPUT_LVDS:
+ crtc_mask = dev_priv->ops->lvds_mask;
+ clone_mask = 0;
+ break;
+ case INTEL_OUTPUT_MIPI:
+ crtc_mask = (1 << 0);
+ clone_mask = 0;
+ break;
+ case INTEL_OUTPUT_MIPI2:
+ crtc_mask = (1 << 2);
+ clone_mask = 0;
+ break;
+ case INTEL_OUTPUT_HDMI:
+ crtc_mask = dev_priv->ops->hdmi_mask;
+ clone_mask = (1 << INTEL_OUTPUT_HDMI);
+ break;
+ case INTEL_OUTPUT_DISPLAYPORT:
+ crtc_mask = (1 << 0) | (1 << 1);
+ clone_mask = 0;
+ break;
+ case INTEL_OUTPUT_EDP:
+ crtc_mask = (1 << 1);
+ clone_mask = 0;
+ }
+ encoder->possible_crtcs = crtc_mask;
+ encoder->possible_clones =
+ gma_connector_clones(dev, clone_mask);
+ }
+}
+
+void psb_modeset_init(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;
+ int i;
+
+ drm_mode_config_init(dev);
+
+ dev->mode_config.min_width = 0;
+ dev->mode_config.min_height = 0;
+
+ dev->mode_config.funcs = &psb_mode_funcs;
+
+ /* set memory base */
+ /* Oaktrail and Poulsbo should use BAR 2*/
+ pci_read_config_dword(dev->pdev, PSB_BSM, (u32 *)
+ &(dev->mode_config.fb_base));
+
+ /* num pipes is 2 for PSB but 1 for Mrst */
+ for (i = 0; i < dev_priv->num_pipe; i++)
+ psb_intel_crtc_init(dev, i, mode_dev);
+
+ dev->mode_config.max_width = 4096;
+ dev->mode_config.max_height = 4096;
+
+ psb_setup_outputs(dev);
+
+ if (dev_priv->ops->errata)
+ dev_priv->ops->errata(dev);
+
+ dev_priv->modeset = true;
+}
+
+void psb_modeset_cleanup(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ if (dev_priv->modeset) {
+ drm_kms_helper_poll_fini(dev);
+ psb_fbdev_fini(dev);
+ drm_mode_config_cleanup(dev);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 02:19:31 +0000