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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/gma500/fbdev.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/gma500/fbdev.c')
-rw-r--r--drivers/gpu/drm/gma500/fbdev.c338
1 files changed, 338 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/fbdev.c b/drivers/gpu/drm/gma500/fbdev.c
new file mode 100644
index 0000000000..98b44974d4
--- /dev/null
+++ b/drivers/gpu/drm/gma500/fbdev.c
@@ -0,0 +1,338 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**************************************************************************
+ * Copyright (c) 2007-2011, Intel Corporation.
+ * All Rights Reserved.
+ *
+ **************************************************************************/
+
+#include <linux/fb.h>
+#include <linux/pfn_t.h>
+
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_framebuffer.h>
+
+#include "gem.h"
+#include "psb_drv.h"
+
+/*
+ * VM area struct
+ */
+
+static vm_fault_t psb_fbdev_vm_fault(struct vm_fault *vmf)
+{
+ struct vm_area_struct *vma = vmf->vma;
+ struct fb_info *info = vma->vm_private_data;
+ unsigned long address = vmf->address - (vmf->pgoff << PAGE_SHIFT);
+ unsigned long pfn = info->fix.smem_start >> PAGE_SHIFT;
+ vm_fault_t err = VM_FAULT_SIGBUS;
+ unsigned long page_num = vma_pages(vma);
+ unsigned long i;
+
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+ for (i = 0; i < page_num; ++i) {
+ err = vmf_insert_mixed(vma, address, __pfn_to_pfn_t(pfn, PFN_DEV));
+ if (unlikely(err & VM_FAULT_ERROR))
+ break;
+ address += PAGE_SIZE;
+ ++pfn;
+ }
+
+ return err;
+}
+
+static const struct vm_operations_struct psb_fbdev_vm_ops = {
+ .fault = psb_fbdev_vm_fault,
+};
+
+/*
+ * struct fb_ops
+ */
+
+#define CMAP_TOHW(_val, _width) ((((_val) << (_width)) + 0x7FFF - (_val)) >> 16)
+
+static int psb_fbdev_fb_setcolreg(unsigned int regno,
+ unsigned int red, unsigned int green,
+ unsigned int blue, unsigned int 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 psb_fbdev_fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+ 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 = &psb_fbdev_vm_ops;
+ vma->vm_private_data = info;
+ vm_flags_set(vma, VM_IO | VM_MIXEDMAP | VM_DONTEXPAND | VM_DONTDUMP);
+
+ return 0;
+}
+
+static void psb_fbdev_fb_destroy(struct fb_info *info)
+{
+ struct drm_fb_helper *fb_helper = info->par;
+ struct drm_framebuffer *fb = fb_helper->fb;
+ struct drm_gem_object *obj = fb->obj[0];
+
+ drm_fb_helper_fini(fb_helper);
+
+ drm_framebuffer_unregister_private(fb);
+ fb->obj[0] = NULL;
+ drm_framebuffer_cleanup(fb);
+ kfree(fb);
+
+ drm_gem_object_put(obj);
+
+ drm_client_release(&fb_helper->client);
+
+ drm_fb_helper_unprepare(fb_helper);
+ kfree(fb_helper);
+}
+
+static const struct fb_ops psb_fbdev_fb_ops = {
+ .owner = THIS_MODULE,
+ __FB_DEFAULT_IOMEM_OPS_RDWR,
+ DRM_FB_HELPER_DEFAULT_OPS,
+ .fb_setcolreg = psb_fbdev_fb_setcolreg,
+ __FB_DEFAULT_IOMEM_OPS_DRAW,
+ .fb_mmap = psb_fbdev_fb_mmap,
+ .fb_destroy = psb_fbdev_fb_destroy,
+};
+
+/*
+ * struct drm_fb_helper_funcs
+ */
+
+static int psb_fbdev_fb_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 = to_drm_psb_private(dev);
+ struct pci_dev *pdev = to_pci_dev(dev->dev);
+ struct fb_info *info;
+ struct drm_framebuffer *fb;
+ struct drm_mode_fb_cmd2 mode_cmd = { };
+ int size;
+ int ret;
+ struct psb_gem_object *backing;
+ struct drm_gem_object *obj;
+ u32 bpp, depth;
+
+ /* No 24-bit packed mode */
+ if (sizes->surface_bpp == 24) {
+ sizes->surface_bpp = 32;
+ sizes->surface_depth = 24;
+ }
+ bpp = sizes->surface_bpp;
+ depth = sizes->surface_depth;
+
+ /*
+ * If the mode does not fit in 32 bit then switch to 16 bit to get
+ * a console on full resolution. The X mode setting server will
+ * allocate its own 32-bit GEM framebuffer.
+ */
+ size = ALIGN(sizes->surface_width * DIV_ROUND_UP(bpp, 8), 64) *
+ sizes->surface_height;
+ size = ALIGN(size, PAGE_SIZE);
+
+ if (size > dev_priv->vram_stolen_size) {
+ sizes->surface_bpp = 16;
+ sizes->surface_depth = 16;
+ }
+ bpp = sizes->surface_bpp;
+ depth = sizes->surface_depth;
+
+ mode_cmd.width = sizes->surface_width;
+ mode_cmd.height = sizes->surface_height;
+ mode_cmd.pitches[0] = ALIGN(mode_cmd.width * DIV_ROUND_UP(bpp, 8), 64);
+ mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp, depth);
+
+ size = mode_cmd.pitches[0] * mode_cmd.height;
+ size = ALIGN(size, PAGE_SIZE);
+
+ /* Allocate the framebuffer in the GTT with stolen page backing */
+ backing = psb_gem_create(dev, size, "fb", true, PAGE_SIZE);
+ if (IS_ERR(backing))
+ return PTR_ERR(backing);
+ obj = &backing->base;
+
+ fb = psb_framebuffer_create(dev, &mode_cmd, obj);
+ if (IS_ERR(fb)) {
+ ret = PTR_ERR(fb);
+ goto err_drm_gem_object_put;
+ }
+
+ fb_helper->fb = fb;
+
+ info = drm_fb_helper_alloc_info(fb_helper);
+ if (IS_ERR(info)) {
+ ret = PTR_ERR(info);
+ goto err_drm_framebuffer_unregister_private;
+ }
+
+ info->fbops = &psb_fbdev_fb_ops;
+
+ /* Accessed stolen memory directly */
+ info->screen_base = dev_priv->vram_addr + backing->offset;
+ info->screen_size = size;
+
+ drm_fb_helper_fill_info(info, fb_helper, sizes);
+
+ info->fix.smem_start = dev_priv->stolen_base + backing->offset;
+ info->fix.smem_len = size;
+ info->fix.ywrapstep = 0;
+ info->fix.ypanstep = 0;
+ info->fix.mmio_start = pci_resource_start(pdev, 0);
+ info->fix.mmio_len = pci_resource_len(pdev, 0);
+
+ fb_memset_io(info->screen_base, 0, info->screen_size);
+
+ /* 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;
+
+err_drm_framebuffer_unregister_private:
+ drm_framebuffer_unregister_private(fb);
+ fb->obj[0] = NULL;
+ drm_framebuffer_cleanup(fb);
+ kfree(fb);
+err_drm_gem_object_put:
+ drm_gem_object_put(obj);
+ return ret;
+}
+
+static const struct drm_fb_helper_funcs psb_fbdev_fb_helper_funcs = {
+ .fb_probe = psb_fbdev_fb_probe,
+};
+
+/*
+ * struct drm_client_funcs and setup code
+ */
+
+static void psb_fbdev_client_unregister(struct drm_client_dev *client)
+{
+ struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+
+ if (fb_helper->info) {
+ drm_fb_helper_unregister_info(fb_helper);
+ } else {
+ drm_fb_helper_unprepare(fb_helper);
+ drm_client_release(&fb_helper->client);
+ kfree(fb_helper);
+ }
+}
+
+static int psb_fbdev_client_restore(struct drm_client_dev *client)
+{
+ drm_fb_helper_lastclose(client->dev);
+
+ return 0;
+}
+
+static int psb_fbdev_client_hotplug(struct drm_client_dev *client)
+{
+ struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
+ struct drm_device *dev = client->dev;
+ int ret;
+
+ if (dev->fb_helper)
+ return drm_fb_helper_hotplug_event(dev->fb_helper);
+
+ ret = drm_fb_helper_init(dev, fb_helper);
+ if (ret)
+ goto err_drm_err;
+
+ if (!drm_drv_uses_atomic_modeset(dev))
+ drm_helper_disable_unused_functions(dev);
+
+ ret = drm_fb_helper_initial_config(fb_helper);
+ if (ret)
+ goto err_drm_fb_helper_fini;
+
+ return 0;
+
+err_drm_fb_helper_fini:
+ drm_fb_helper_fini(fb_helper);
+err_drm_err:
+ drm_err(dev, "Failed to setup gma500 fbdev emulation (ret=%d)\n", ret);
+ return ret;
+}
+
+static const struct drm_client_funcs psb_fbdev_client_funcs = {
+ .owner = THIS_MODULE,
+ .unregister = psb_fbdev_client_unregister,
+ .restore = psb_fbdev_client_restore,
+ .hotplug = psb_fbdev_client_hotplug,
+};
+
+void psb_fbdev_setup(struct drm_psb_private *dev_priv)
+{
+ struct drm_device *dev = &dev_priv->dev;
+ struct drm_fb_helper *fb_helper;
+ int ret;
+
+ fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
+ if (!fb_helper)
+ return;
+ drm_fb_helper_prepare(dev, fb_helper, 32, &psb_fbdev_fb_helper_funcs);
+
+ ret = drm_client_init(dev, &fb_helper->client, "fbdev-gma500", &psb_fbdev_client_funcs);
+ if (ret) {
+ drm_err(dev, "Failed to register client: %d\n", ret);
+ goto err_drm_fb_helper_unprepare;
+ }
+
+ drm_client_register(&fb_helper->client);
+
+ return;
+
+err_drm_fb_helper_unprepare:
+ drm_fb_helper_unprepare(fb_helper);
+ kfree(fb_helper);
+}