Adds a driver for the Loongson-2K BMC display as a sub-function of
the BMC device.
Display-related scan output buffers, sizes, and display formats are
provided through the Loongson-2K BMC MFD driver.
Co-developed-by: Chong Qiao <qiaoch...@loongson.cn>
Signed-off-by: Chong Qiao <qiaoch...@loongson.cn>
Signed-off-by: Binbin Zhou <zhoubin...@loongson.cn>
---
drivers/gpu/drm/tiny/Kconfig | 18 +
drivers/gpu/drm/tiny/Makefile | 1 +
drivers/gpu/drm/tiny/ls2kbmc.c | 636 +++++++++++++++++++++++++++++++++
3 files changed, 655 insertions(+)
create mode 100644 drivers/gpu/drm/tiny/ls2kbmc.c
diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig
index 94cbdb1337c0..5412f639a964 100644
--- a/drivers/gpu/drm/tiny/Kconfig
+++ b/drivers/gpu/drm/tiny/Kconfig
@@ -171,6 +171,24 @@ config TINYDRM_ILI9486
If M is selected the module will be called ili9486.
+config TINYDRM_LS2KBMC
+ tristate "DRM support for Loongson-2K BMC display"
+ depends on DRM && MMU
+ depends on MFD_LS2K_BMC
+ select APERTURE_HELPERS
+ select DRM_CLIENT_SELECTION
+ select DRM_GEM_SHMEM_HELPER
+ select DRM_KMS_HELPER
+ help
+ DRM driver for the Loongson-2K BMC display.
+
+ This driver assumes that the display hardware has been initialized
+ by the Loongson-2K BMC. Since the Loongson-2K BMC does not support
+ resolution detection now, the scan buffer, size and display format
+ are fixed and provided by the BMC.
+
+ If M is selected the module will be called ls2kbmc.
+
config TINYDRM_MI0283QT
tristate "DRM support for MI0283QT"
depends on DRM && SPI
diff --git a/drivers/gpu/drm/tiny/Makefile b/drivers/gpu/drm/tiny/Makefile
index 4aaf56f8707d..fa4e1646db77 100644
--- a/drivers/gpu/drm/tiny/Makefile
+++ b/drivers/gpu/drm/tiny/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_TINYDRM_ILI9163) += ili9163.o
obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o
obj-$(CONFIG_TINYDRM_ILI9341) += ili9341.o
obj-$(CONFIG_TINYDRM_ILI9486) += ili9486.o
+obj-$(CONFIG_TINYDRM_LS2KBMC) += ls2kbmc.o
obj-$(CONFIG_TINYDRM_MI0283QT) += mi0283qt.o
obj-$(CONFIG_TINYDRM_REPAPER) += repaper.o
obj-$(CONFIG_TINYDRM_SHARP_MEMORY) += sharp-memory.o
diff --git a/drivers/gpu/drm/tiny/ls2kbmc.c b/drivers/gpu/drm/tiny/ls2kbmc.c
new file mode 100644
index 000000000000..909d6c687193
--- /dev/null
+++ b/drivers/gpu/drm/tiny/ls2kbmc.c
@@ -0,0 +1,636 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * DRM driver for Loongson-2K BMC display
+ *
+ * Copyright (C) 2024 Loongson Technology Corporation Limited.
+ *
+ * Based on simpledrm
+ */
+
+#include <linux/aperture.h>
+#include <linux/minmax.h>
+#include <linux/pci.h>
+#include <linux/platform_data/simplefb.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_client_setup.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_device.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fbdev_shmem.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_gem_shmem_helper.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_modeset_helper_vtables.h>
+#include <drm/drm_panic.h>
+#include <drm/drm_probe_helper.h>
+
+struct ls2kbmc_pdata {
+ struct pci_dev *pdev;
+ struct simplefb_platform_data pd;
+};
+
+/*
+ * Helpers for simplefb_platform_data
+ */
+
+static int
+simplefb_get_validated_int(struct drm_device *dev, const char *name,
+ u32 value)
+{
+ if (value > INT_MAX) {
+ drm_err(dev, "simplefb: invalid framebuffer %s of %u\n",
+ name, value);
+ return -EINVAL;
+ }
+ return (int)value;
+}
+
+static int
+simplefb_get_validated_int0(struct drm_device *dev, const char *name,
+ u32 value)
+{
+ if (!value) {
+ drm_err(dev, "simplefb: invalid framebuffer %s of %u\n",
+ name, value);
+ return -EINVAL;
+ }
+ return simplefb_get_validated_int(dev, name, value);
+}
+
+static const struct drm_format_info *
+simplefb_get_validated_format(struct drm_device *dev, const char *format_name)
+{
+ static const struct simplefb_format formats[] = SIMPLEFB_FORMATS;
+ const struct simplefb_format *fmt = formats;
+ const struct simplefb_format *end = fmt + ARRAY_SIZE(formats);
+ const struct drm_format_info *info;
+
+ if (!format_name) {
+ drm_err(dev, "simplefb: missing framebuffer format\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ while (fmt < end) {
+ if (!strcmp(format_name, fmt->name)) {
+ info = drm_format_info(fmt->fourcc);
+ if (!info)
+ return ERR_PTR(-EINVAL);
+ return info;
+ }
+ ++fmt;
+ }
+
+ drm_err(dev, "simplefb: unknown framebuffer format %s\n",
+ format_name);
+
+ return ERR_PTR(-EINVAL);
+}
+
+static int
+simplefb_get_width_pd(struct drm_device *dev,
+ const struct simplefb_platform_data *pd)
+{
+ return simplefb_get_validated_int0(dev, "width", pd->width);
+}
+
+static int
+simplefb_get_height_pd(struct drm_device *dev,
+ const struct simplefb_platform_data *pd)
+{
+ return simplefb_get_validated_int0(dev, "height", pd->height);
+}
+
+static int
+simplefb_get_stride_pd(struct drm_device *dev,
+ const struct simplefb_platform_data *pd)
+{
+ return simplefb_get_validated_int(dev, "stride", pd->stride);
+}
+
+static const struct drm_format_info *
+simplefb_get_format_pd(struct drm_device *dev,
+ const struct simplefb_platform_data *pd)
+{
+ return simplefb_get_validated_format(dev, pd->format);
+}
+
+/*
+ * ls2kbmc Framebuffer device
+ */
+
+struct ls2kbmc_device {
+ struct drm_device dev;
+
+ /* simplefb settings */
+ struct drm_display_mode mode;
+ const struct drm_format_info *format;
+ unsigned int pitch;
+
+ /* memory management */
+ struct iosys_map screen_base;
+
+ /* modesetting */
+ u32 formats[8];
+ struct drm_plane primary_plane;
+ struct drm_crtc crtc;
+ struct drm_encoder encoder;
+ struct drm_connector connector;
+};
+
+static struct ls2kbmc_device *ls2kbmc_device_of_dev(struct drm_device *dev)
+{
+ return container_of(dev, struct ls2kbmc_device, dev);
+}
+
+/*
+ * Modesetting
+ */
+
+static const u64 ls2kbmc_primary_plane_format_modifiers[] = {
+ DRM_FORMAT_MOD_LINEAR,
+ DRM_FORMAT_MOD_INVALID
+};
+
+static int ls2kbmc_primary_plane_helper_atomic_check(struct drm_plane *plane,
+ struct drm_atomic_state
*state)
+{
+ struct drm_plane_state *new_plane_state =
drm_atomic_get_new_plane_state(state, plane);
+ struct drm_shadow_plane_state *new_shadow_plane_state =
+ to_drm_shadow_plane_state(new_plane_state);
+ struct drm_framebuffer *new_fb = new_plane_state->fb;
+ struct drm_crtc *new_crtc = new_plane_state->crtc;
+ struct drm_crtc_state *new_crtc_state = NULL;
+ struct drm_device *dev = plane->dev;
+ struct ls2kbmc_device *sdev = ls2kbmc_device_of_dev(dev);
+ int ret;
+
+ if (new_crtc)
+ new_crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc);
+
+ ret = drm_atomic_helper_check_plane_state(new_plane_state,
new_crtc_state,
+ DRM_PLANE_NO_SCALING,
+ DRM_PLANE_NO_SCALING,
+ false, false);
+ if (ret)
+ return ret;
+ else if (!new_plane_state->visible)
+ return 0;
+
+ if (new_fb->format != sdev->format) {
+ void *buf;
+
+ /* format conversion necessary; reserve buffer */
+ buf =
drm_format_conv_state_reserve(&new_shadow_plane_state->fmtcnv_state,
+ sdev->pitch, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void ls2kbmc_primary_plane_helper_atomic_update(struct drm_plane *plane,
+ struct drm_atomic_state
*state)
+{
+ struct drm_plane_state *plane_state =
drm_atomic_get_new_plane_state(state, plane);
+ struct drm_plane_state *old_plane_state =
drm_atomic_get_old_plane_state(state, plane);
+ struct drm_shadow_plane_state *shadow_plane_state =
to_drm_shadow_plane_state(plane_state);
+ struct drm_framebuffer *fb = plane_state->fb;
+ struct drm_device *dev = plane->dev;
+ struct ls2kbmc_device *sdev = ls2kbmc_device_of_dev(dev);
+ struct drm_atomic_helper_damage_iter iter;
+ struct drm_rect damage;
+ int ret, idx;
+
+ ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
+ if (ret)
+ return;
+
+ if (!drm_dev_enter(dev, &idx))
+ goto out_drm_gem_fb_end_cpu_access;
+
+ drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
+ drm_atomic_for_each_plane_damage(&iter, &damage) {
+ struct drm_rect dst_clip = plane_state->dst;
+ struct iosys_map dst = sdev->screen_base;
+
+ if (!drm_rect_intersect(&dst_clip, &damage))
+ continue;
+
+ iosys_map_incr(&dst, drm_fb_clip_offset(sdev->pitch,
sdev->format, &dst_clip));
+ drm_fb_blit(&dst, &sdev->pitch, sdev->format->format,
shadow_plane_state->data,
+ fb, &damage, &shadow_plane_state->fmtcnv_state);
+ }
+
+ drm_dev_exit(idx);
+out_drm_gem_fb_end_cpu_access:
+ drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
+}
+
+static void ls2kbmc_primary_plane_helper_atomic_disable(struct drm_plane
*plane,
+ struct drm_atomic_state
*state)
+{
+ struct drm_device *dev = plane->dev;
+ struct ls2kbmc_device *sdev = ls2kbmc_device_of_dev(dev);
+ int idx;
+
+ if (!drm_dev_enter(dev, &idx))
+ return;
+
+ /* Clear screen to black if disabled */
+ iosys_map_memset(&sdev->screen_base, 0, 0, sdev->pitch *
sdev->mode.vdisplay);
+
+ drm_dev_exit(idx);
+}
+
+static int ls2kbmc_primary_plane_helper_get_scanout_buffer(struct drm_plane
*plane,
+ struct
drm_scanout_buffer *sb)
+{
+ struct ls2kbmc_device *sdev = ls2kbmc_device_of_dev(plane->dev);
+
+ sb->width = sdev->mode.hdisplay;
+ sb->height = sdev->mode.vdisplay;
+ sb->format = sdev->format;
+ sb->pitch[0] = sdev->pitch;
+ sb->map[0] = sdev->screen_base;
+
+ return 0;
+}
+
+static const struct drm_plane_helper_funcs ls2kbmc_primary_plane_helper_funcs
= {
+ DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
+ .atomic_check = ls2kbmc_primary_plane_helper_atomic_check,
+ .atomic_update = ls2kbmc_primary_plane_helper_atomic_update,
+ .atomic_disable = ls2kbmc_primary_plane_helper_atomic_disable,
+ .get_scanout_buffer = ls2kbmc_primary_plane_helper_get_scanout_buffer,
+};
+
+static const struct drm_plane_funcs ls2kbmc_primary_plane_funcs = {
+ .update_plane = drm_atomic_helper_update_plane,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .destroy = drm_plane_cleanup,
+ DRM_GEM_SHADOW_PLANE_FUNCS,
+};
+
+static enum drm_mode_status ls2kbmc_crtc_helper_mode_valid(struct drm_crtc
*crtc,
+ const struct
drm_display_mode *mode)
+{
+ struct ls2kbmc_device *sdev = ls2kbmc_device_of_dev(crtc->dev);
+
+ return drm_crtc_helper_mode_valid_fixed(crtc, mode, &sdev->mode);
+}
+
+/*
+ * The CRTC is always enabled. Screen updates are performed by
+ * the primary plane's atomic_update function. Disabling clears
+ * the screen in the primary plane's atomic_disable function.
+ */
+static const struct drm_crtc_helper_funcs ls2kbmc_crtc_helper_funcs = {
+ .mode_valid = ls2kbmc_crtc_helper_mode_valid,
+ .atomic_check = drm_crtc_helper_atomic_check,
+};
+
+static const struct drm_crtc_funcs ls2kbmc_crtc_funcs = {
+ .reset = drm_atomic_helper_crtc_reset,
+ .destroy = drm_crtc_cleanup,
+ .set_config = drm_atomic_helper_set_config,
+ .page_flip = drm_atomic_helper_page_flip,
+ .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+};
+
+static const struct drm_encoder_funcs ls2kbmc_encoder_funcs = {
+ .destroy = drm_encoder_cleanup,
+};
+
+static int ls2kbmc_connector_helper_get_modes(struct drm_connector *connector)
+{
+ struct ls2kbmc_device *sdev = ls2kbmc_device_of_dev(connector->dev);
+
+ return drm_connector_helper_get_modes_fixed(connector, &sdev->mode);
+}
+
+static const struct drm_connector_helper_funcs ls2kbmc_connector_helper_funcs
= {
+ .get_modes = ls2kbmc_connector_helper_get_modes,
+};
+
+static const struct drm_connector_funcs ls2kbmc_connector_funcs = {
+ .reset = drm_atomic_helper_connector_reset,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+};
+
+static const struct drm_mode_config_funcs ls2kbmc_mode_config_funcs = {
+ .fb_create = drm_gem_fb_create_with_dirty,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+};
+
+/*
+ * Init / Cleanup
+ */
+
+static struct drm_display_mode ls2kbmc_mode(unsigned int width, unsigned int
height,
+ unsigned int width_mm, unsigned int
height_mm)
+{
+ const struct drm_display_mode mode = {
+ DRM_MODE_INIT(60, width, height, width_mm, height_mm)
+ };
+
+ return mode;
+}
+
+/*
+ * DRM driver
+ */
+
+DEFINE_DRM_GEM_FOPS(ls2kbmc_fops);
+
+static struct drm_driver ls2kbmc_driver = {
+ DRM_GEM_SHMEM_DRIVER_OPS,
+ DRM_FBDEV_SHMEM_DRIVER_OPS,
+ .name = "simpledrm",
+ .desc = "DRM driver for Loongson-2K BMC",
+ .date = "20241211",
+ .major = 1,
+ .minor = 0,
+ .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
+ .fops = &ls2kbmc_fops,
+};
+
+/*
+ * Currently the Loongson-2K0500 BMC hardware does not have an i2c interface to
+ * adapt to the resolution.
+ * We set the resolution by presetting "video=1280x1024-16@2M" to the bmc
memory.
+ */
+static int ls2kbmc_get_video_mode(struct pci_dev *pdev, struct
simplefb_platform_data *pd)
+{
+ char *mode;
+ int depth, ret;
+
+ /* The pci mem bar last 16M is used to store the string. */
+ mode = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0) + SZ_16M,
SZ_16M);
+ if (!mode)
+ return -ENOMEM;
+
+ /*env at last 16M's beginning, first env is video */
+ if (!strncmp(mode, "video=", 6))
+ mode = mode + 6;
+
+ ret = kstrtoint(strsep(&mode, "x"), 10, &pd->width);
+ if (ret)
+ return ret;
+
+ ret = kstrtoint(strsep(&mode, "-"), 10, &pd->height);
+ if (ret)
+ return ret;
+
+ ret = kstrtoint(strsep(&mode, "@"), 10, &depth);
+ if (ret)
+ return ret;
+
+ pd->stride = pd->width * depth / 8;
+ pd->format = depth == 32 ? "a8r8g8b8" : "r5g6b5";
+
+ return 0;
+}
+
+static struct ls2kbmc_device *ls2kbmc_device_create(struct drm_driver *drv,
+ struct platform_device
*pdev,
+ struct ls2kbmc_pdata *priv)
+{
+ struct pci_dev *ppdev = priv->pdev;
+ struct simplefb_platform_data *pd = &priv->pd;
+ struct ls2kbmc_device *sdev;
+ struct drm_device *dev;
+ int width, height, stride;
+ int width_mm = 0, height_mm = 0;
+ const struct drm_format_info *format;
+ struct resource *res, *mem = NULL;
+ struct drm_plane *primary_plane;
+ struct drm_crtc *crtc;
+ struct drm_encoder *encoder;
+ struct drm_connector *connector;
+ unsigned long max_width, max_height;
+ void __iomem *screen_base;
+ size_t nformats;
+ int ret;
+
+ sdev = devm_drm_dev_alloc(&pdev->dev, drv, struct ls2kbmc_device, dev);
+ if (IS_ERR(sdev))
+ return ERR_CAST(sdev);
+ dev = &sdev->dev;
+ platform_set_drvdata(pdev, sdev);
+
+ ret = ls2kbmc_get_video_mode(ppdev, pd);
+ if (ret) {
+ drm_err(dev, "no simplefb configuration found\n");
+ return ERR_PTR(ret);
+ }
+
+ width = simplefb_get_width_pd(dev, pd);
+ if (width < 0)
+ return ERR_PTR(width);
+
+ height = simplefb_get_height_pd(dev, pd);
+ if (height < 0)
+ return ERR_PTR(height);
+
+ stride = simplefb_get_stride_pd(dev, pd);
+ if (stride < 0)
+ return ERR_PTR(stride);
+
+ if (!stride) {
+ stride = drm_format_info_min_pitch(format, 0, width);
+ if (drm_WARN_ON(dev, !stride))
+ return ERR_PTR(-EINVAL);
+ }
+
+ format = simplefb_get_format_pd(dev, pd);
+ if (IS_ERR(format))
+ return ERR_CAST(format);
+
+ /*
+ * Assume a monitor resolution of 96 dpi if physical dimensions
+ * are not specified to get a somewhat reasonable screen size.
+ */
+ if (!width_mm)
+ width_mm = DRM_MODE_RES_MM(width, 96ul);
+ if (!height_mm)
+ height_mm = DRM_MODE_RES_MM(height, 96ul);
+
+ sdev->mode = ls2kbmc_mode(width, height, width_mm, height_mm);
+ sdev->format = format;
+ sdev->pitch = stride;
+
+ drm_dbg(dev, "display mode={" DRM_MODE_FMT "}\n",
DRM_MODE_ARG(&sdev->mode));
+ drm_dbg(dev, "framebuffer format=%p4cc, size=%dx%d, stride=%d byte\n",
+ &format->format, width, height, stride);
+
+ /*
+ * Memory management
+ */
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return ERR_PTR(-EINVAL);
+
+ ret = aperture_remove_conflicting_pci_devices(ppdev,
ls2kbmc_driver.name);
+ if (ret) {
+ drm_err(dev, "could not acquire memory range %pr: %d\n", res,
ret);
+ return ERR_PTR(ret);
+ }
+
+ drm_dbg(dev, "using I/O memory framebuffer at %pr\n", res);
+
+ mem = devm_request_mem_region(&ppdev->dev, res->start,
resource_size(res),
+ drv->name);
+ if (!mem) {
+ /*
+ * We cannot make this fatal. Sometimes this comes from magic
+ * spaces our resource handlers simply don't know about. Use
+ * the I/O-memory resource as-is and try to map that instead.
+ */
+ drm_warn(dev, "could not acquire memory region %pr\n", res);
+ mem = res;
+ }
+
+ screen_base = devm_ioremap_wc(&ppdev->dev, mem->start,
resource_size(mem));
+ if (!screen_base)
+ return ERR_PTR(-ENOMEM);
+
+ iosys_map_set_vaddr_iomem(&sdev->screen_base, screen_base);
+
+ /*
+ * Modesetting
+ */
+
+ ret = drmm_mode_config_init(dev);
+ if (ret)
+ return ERR_PTR(ret);
+
+ max_width = max_t(unsigned long, width, DRM_SHADOW_PLANE_MAX_WIDTH);
+ max_height = max_t(unsigned long, height, DRM_SHADOW_PLANE_MAX_HEIGHT);
+
+ dev->mode_config.min_width = width;
+ dev->mode_config.max_width = max_width;
+ dev->mode_config.min_height = height;
+ dev->mode_config.max_height = max_height;
+ dev->mode_config.preferred_depth = format->depth;
+ dev->mode_config.funcs = &ls2kbmc_mode_config_funcs;
+
+ /* Primary plane */
+
+ nformats = drm_fb_build_fourcc_list(dev, &format->format, 1,
+ sdev->formats,
ARRAY_SIZE(sdev->formats));
+
+ primary_plane = &sdev->primary_plane;
+ ret = drm_universal_plane_init(dev, primary_plane, 0,
&ls2kbmc_primary_plane_funcs,
+ sdev->formats, nformats,
+ ls2kbmc_primary_plane_format_modifiers,
+ DRM_PLANE_TYPE_PRIMARY, NULL);
+ if (ret)
+ return ERR_PTR(ret);
+ drm_plane_helper_add(primary_plane,
&ls2kbmc_primary_plane_helper_funcs);
+ drm_plane_enable_fb_damage_clips(primary_plane);
+
+ /* CRTC */
+
+ crtc = &sdev->crtc;
+ ret = drm_crtc_init_with_planes(dev, crtc, primary_plane, NULL,
+ &ls2kbmc_crtc_funcs, NULL);
+ if (ret)
+ return ERR_PTR(ret);
+ drm_crtc_helper_add(crtc, &ls2kbmc_crtc_helper_funcs);
+
+ /* Encoder */
+
+ encoder = &sdev->encoder;
+ ret = drm_encoder_init(dev, encoder, &ls2kbmc_encoder_funcs,
+ DRM_MODE_ENCODER_NONE, NULL);
+ if (ret)
+ return ERR_PTR(ret);
+ encoder->possible_crtcs = drm_crtc_mask(crtc);
+
+ /* Connector */
+
+ connector = &sdev->connector;
+ ret = drm_connector_init(dev, connector, &ls2kbmc_connector_funcs,
+ DRM_MODE_CONNECTOR_Unknown);
+ if (ret)
+ return ERR_PTR(ret);
+ drm_connector_helper_add(connector, &ls2kbmc_connector_helper_funcs);
+ drm_connector_set_panel_orientation_with_quirk(connector,
+
DRM_MODE_PANEL_ORIENTATION_UNKNOWN,
+ width, height);
+
+ ret = drm_connector_attach_encoder(connector, encoder);
+ if (ret)
+ return ERR_PTR(ret);
+
+ drm_mode_config_reset(dev);
+
+ return sdev;
+}
+
+/*
+ * Platform driver
+ */
+
+static int ls2kbmc_probe(struct platform_device *pdev)
+{
+ struct ls2kbmc_device *sdev;
+ struct ls2kbmc_pdata *priv;
+ struct drm_device *dev;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (IS_ERR(priv))
+ return -ENOMEM;
+
+ priv->pdev = *(struct pci_dev **)dev_get_platdata(&pdev->dev);
+
+ sdev = ls2kbmc_device_create(&ls2kbmc_driver, pdev, priv);
+ if (IS_ERR(sdev))
+ return PTR_ERR(sdev);
+ dev = &sdev->dev;
+
+ ret = drm_dev_register(dev, 0);
+ if (ret)
+ return ret;
+
+ drm_client_setup(dev, sdev->format);
+
+ return 0;
+}
+
+static void ls2kbmc_remove(struct platform_device *pdev)
+{
+ struct ls2kbmc_device *sdev = platform_get_drvdata(pdev);
+ struct drm_device *dev = &sdev->dev;
+
+ drm_dev_unplug(dev);
+}
+
+static struct platform_driver ls2kbmc_platform_driver = {
+ .driver = {
+ .name = "ls2kbmc-framebuffer",
+ },
+ .probe = ls2kbmc_probe,
+ .remove = ls2kbmc_remove,
+};
+
+module_platform_driver(ls2kbmc_platform_driver);
+
+MODULE_DESCRIPTION("DRM driver for Loongson-2K BMC");
+MODULE_LICENSE("GPL");
--
2.43.5
