The mgakms driver uses DRM's fbconv helpers to provide a DRM driver
for Matrox chipsets. This will allow matroxfb to be refactored into
a first-class DRM driver.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/staging/Kconfig | 2 +
drivers/staging/Makefile | 1 +
drivers/staging/mgakms/Kconfig | 13 +++
drivers/staging/mgakms/Makefile | 6 ++
drivers/staging/mgakms/mga_device.c | 68 +++++++++++++++
drivers/staging/mgakms/mga_device.h | 30 +++++++
drivers/staging/mgakms/mga_drv.c | 129 ++++++++++++++++++++++++++++
drivers/staging/mgakms/mga_drv.h | 14 +++
8 files changed, 263 insertions(+)
create mode 100644 drivers/staging/mgakms/Kconfig
create mode 100644 drivers/staging/mgakms/Makefile
create mode 100644 drivers/staging/mgakms/mga_device.c
create mode 100644 drivers/staging/mgakms/mga_device.h
create mode 100644 drivers/staging/mgakms/mga_drv.c
create mode 100644 drivers/staging/mgakms/mga_drv.h
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 6f1fa4c849a1..fd25596813c5 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -125,4 +125,6 @@ source "drivers/staging/exfat/Kconfig"
source "drivers/staging/qlge/Kconfig"
+source "drivers/staging/mgakms/Kconfig"
+
endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index a90f9b308c8d..4c98b028ee99 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -53,3 +53,4 @@ obj-$(CONFIG_UWB) += uwb/
obj-$(CONFIG_USB_WUSB) += wusbcore/
obj-$(CONFIG_EXFAT_FS) += exfat/
obj-$(CONFIG_QLGE) += qlge/
+obj-$(CONFIG_DRM_MGAKMS) += mgakms/
diff --git a/drivers/staging/mgakms/Kconfig b/drivers/staging/mgakms/Kconfig
new file mode 100644
index 000000000000..de23e76317bd
--- /dev/null
+++ b/drivers/staging/mgakms/Kconfig
@@ -0,0 +1,13 @@
+config DRM_MGAKMS
+ tristate "Matrox g200/g400"
+ depends on DRM && PCI
+ select DRM_FBCONV_HELPER
+ select DRM_GEM_SHMEM_HELPER
+ select DRM_KMS_HELPER
+ help
+ Choose this option if you have a Matrox Millennium,
+ Matrox Millennium II, Matrox Mystique, Matrox Mystique 220,
+ Matrox Productiva G100, Matrox Mystique G200,
+ Matrox Millennium G200, Matrox Marvel G200 video, Matrox G400,
+ G450 or G550 card. If M is selected, the module will be called mga.
+ AGP support is required for this driver to work.
diff --git a/drivers/staging/mgakms/Makefile b/drivers/staging/mgakms/Makefile
new file mode 100644
index 000000000000..65695f04eb7f
--- /dev/null
+++ b/drivers/staging/mgakms/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+
+mgakms-y := mga_device.o \
+ mga_drv.o
+
+obj-$(CONFIG_DRM_MGAKMS) += mgakms.o
diff --git a/drivers/staging/mgakms/mga_device.c b/drivers/staging/mgakms/mga_device.c
new file mode 100644
index 000000000000..34b3bb1ed8a5
--- /dev/null
+++ b/drivers/staging/mgakms/mga_device.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/fb.h>
+#include <linux/pci.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_modeset_helper.h>
+
+#include "mga_device.h"
+
+/*
+ * struct mga_device
+ */
+
+int mga_device_init(struct mga_device *mdev, struct drm_driver *drv,
+ struct fb_info *fb_info)
+{
+ static const uint32_t formats[] = {
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_RGB565
+ };
+ static unsigned int max_width = 2048;
+ static unsigned int max_height = 2048;
+ static unsigned int preferred_depth = 32;
+
+ int ret;
+
+ ret = drm_dev_init(&mdev->dev, drv, fb_info->device);
+ if (ret)
+ return ret;
+ mdev->dev.dev_private = mdev;
+ mdev->dev.pdev = container_of(fb_info->device, struct pci_dev, dev);
+ mdev->fb_info = fb_info;
+
+ ret = drm_fbconv_modeset_init(&mdev->modeset, &mdev->dev, fb_info,
+ max_width, max_height, preferred_depth);
+ if (ret)
+ goto err_drm_dev_fini;
+
+ ret = drm_fbconv_modeset_setup_pipe(&mdev->modeset, NULL, formats,
+ ARRAY_SIZE(formats), NULL, NULL);
+ if (ret)
+ goto err_drm_fbconv_modeset_cleanup;
+
+ ret = drm_fbdev_generic_setup(&mdev->dev, 0);
+ if (ret)
+ goto err_drm_fbconv_modeset_cleanup;
+
+ return 0;
+
+err_drm_fbconv_modeset_cleanup:
+ /* cleans up all mode-setting structures */
+ drm_fbconv_modeset_cleanup(&mdev->modeset);
+err_drm_dev_fini:
+ drm_dev_fini(&mdev->dev);
+ return ret;
+}
+
+void mga_device_cleanup(struct mga_device *mdev)
+{
+ struct drm_device *dev = &mdev->dev;
+
+ drm_fbconv_modeset_cleanup(&mdev->modeset);
+
+ drm_dev_fini(dev);
+ dev->dev_private = NULL;
+}
diff --git a/drivers/staging/mgakms/mga_device.h b/drivers/staging/mgakms/mga_device.h
new file mode 100644
index 000000000000..442effbf37bc
--- /dev/null
+++ b/drivers/staging/mgakms/mga_device.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef MGA_DEVICE_H
+#define MGA_DEVICE_H
+
+#include <linux/kernel.h>
+
+#include <drm/drm_device.h>
+#include <drm/drm_fbconv_helper.h>
+
+struct drm_driver;
+struct fb_info;
+
+struct mga_device {
+ struct drm_device dev;
+ struct fb_info *fb_info;
+
+ struct drm_fbconv_modeset modeset;
+};
+
+static inline struct mga_device *mga_device_of_dev(struct drm_device *dev)
+{
+ return container_of(dev, struct mga_device, dev);
+}
+
+int mga_device_init(struct mga_device *mdev, struct drm_driver *drv,
+ struct fb_info *fb_info);
+void mga_device_cleanup(struct mga_device *mdev);
+
+#endif
diff --git a/drivers/staging/mgakms/mga_drv.c b/drivers/staging/mgakms/mga_drv.c
new file mode 100644
index 000000000000..75e26d3046f3
--- /dev/null
+++ b/drivers/staging/mgakms/mga_drv.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/fb.h>
+#include <linux/pci.h>
+
+#include <drm/drm_drv.h>
+#include <drm/drm_fbconv_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_file.h>
+#include <drm/drm_gem_shmem_helper.h>
+#include <drm/drm_ioctl.h>
+
+#include "mga_device.h"
+#include "mga_drv.h"
+
+#define DRIVER_AUTHOR "Thomas Zimmermann <tzimmermann@xxxxxxx>"
+#define DRIVER_NAME "mgakms"
+#define DRIVER_DESCRIPTION "DRM driver for Matrox graphics chipsets"
+#define DRIVER_LICENSE "GPL"
+#define DRIVER_DATE "20190301"
+#define DRIVER_MAJOR 0
+#define DRIVER_MINOR 0
+#define DRIVER_PATCHLEVEL 1
+
+/*
+ * DRM driver
+ */
+
+DEFINE_DRM_GEM_SHMEM_FOPS(mga_file_operations);
+
+static struct drm_driver mga_driver = {
+ .major = DRIVER_MAJOR,
+ .minor = DRIVER_MINOR,
+ .patchlevel = DRIVER_PATCHLEVEL,
+ .name = DRIVER_NAME,
+ .desc = DRIVER_DESCRIPTION,
+ .date = DRIVER_DATE,
+ .driver_features = DRIVER_ATOMIC |
+ DRIVER_GEM |
+ DRIVER_MODESET,
+ .fops = &mga_file_operations,
+ DRM_GEM_SHMEM_DRIVER_OPS,
+};
+
+static void mga_remove_conflicting_framebuffers(struct pci_dev *pdev)
+{
+ struct apertures_struct *ap;
+ bool primary = false;
+
+ ap = alloc_apertures(1);
+ if (!ap)
+ return;
+
+ ap->ranges[0].base = pci_resource_start(pdev, 1);
+ ap->ranges[0].size = pci_resource_len(pdev, 1);
+
+#ifdef CONFIG_X86
+ primary = pdev->resource[PCI_ROM_RESOURCE].flags &
+ IORESOURCE_ROM_SHADOW;
+#endif
+ drm_fb_helper_remove_conflicting_framebuffers(ap, DRIVER_NAME,
+ primary);
+ kfree(ap);
+}
+
+static struct mga_device *mga_create_device(struct fb_info *fb_info)
+{
+ struct mga_device *mdev;
+ int ret;
+
+ mdev = devm_kzalloc(fb_info->device, sizeof(*mdev), GFP_KERNEL);
+ if (!mdev)
+ return ERR_PTR(-ENOMEM);
+ ret = mga_device_init(mdev, &mga_driver, fb_info);
+ if (ret)
+ goto err_devm_kfree;
+ return mdev;
+
+err_devm_kfree:
+ devm_kfree(fb_info->device, mdev);
+ return ERR_PTR(ret);
+}
+
+static void mga_destroy_device(struct mga_device *mdev)
+{
+ struct device *dev = mdev->fb_info->device;
+
+ mga_device_cleanup(mdev);
+ devm_kfree(dev, mdev);
+}
+
+struct mga_device *mga_register_framebuffer(struct fb_info *fb_info,
+ struct pci_dev *pdev)
+{
+ int ret;
+ struct mga_device *mdev;
+
+ mga_remove_conflicting_framebuffers(pdev);
+
+ ret = drm_fbconv_fill_fb_info(fb_info);
+ if (ret)
+ return ERR_PTR(ret);
+
+ mdev = mga_create_device(fb_info);
+ if (IS_ERR(mdev)) {
+ ret = PTR_ERR(mdev);
+ goto err_drm_fbconv_cleanup_fb_info;
+ }
+
+ ret = drm_dev_register(&mdev->dev, 0);
+ if (ret)
+ goto err_mga_destroy_device;
+
+ return mdev;
+
+err_mga_destroy_device:
+ mga_destroy_device(mdev);
+err_drm_fbconv_cleanup_fb_info:
+ drm_fbconv_cleanup_fb_info(fb_info);
+ return ERR_PTR(ret);
+}
+
+void mga_unregister_framebuffer(struct mga_device *mdev)
+{
+ struct fb_info *fb_info = mdev->fb_info;
+
+ mga_destroy_device(mdev);
+ drm_fbconv_cleanup_fb_info(fb_info);
+}
diff --git a/drivers/staging/mgakms/mga_drv.h b/drivers/staging/mgakms/mga_drv.h
new file mode 100644
index 000000000000..d214719516c0
--- /dev/null
+++ b/drivers/staging/mgakms/mga_drv.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef MGA_DRV_H
+#define MGA_DRV_H
+
+struct fb_info;
+struct mga_device;
+struct pci_dev;
+
+struct mga_device *mga_register_framebuffer(struct fb_info *fb_info,
+ struct pci_dev *pdev);
+void mga_unregister_framebuffer(struct mga_device *mdev);
+
+#endif
--
2.23.0
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