Hi Javier,

Thank you for the patch.

On Mon, May 02, 2022 at 10:48:29AM +0200, Javier Martinez Canillas wrote:

By default the bits per pixel for the emulated framebuffer device is set to dev->mode_config.preferred_depth, but some devices need another value.

Since this second parameter is only used by a few drivers, and to allow drivers to use it for passing other configurations when registering the fbdev, rename @preferred_bpp to @options and make it a multi-field param.

The DRM_FB_SET_OPTION() and DRM_FB_GET_OPTION() macros are provided for drivers to set and get an option respectively. For now, only DRM_FB_BPP option exists but other options would be added later.

Suggested-by: Thomas Zimmermann tzimmermann@suse.de Signed-off-by: Javier Martinez Canillas javierm@redhat.com

---

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 ++++-- drivers/gpu/drm/arm/hdlcd_drv.c | 2 +- drivers/gpu/drm/arm/malidp_drv.c | 2 +- drivers/gpu/drm/aspeed/aspeed_gfx_drv.c | 2 +- drivers/gpu/drm/ast/ast_drv.c | 2 +- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 2 +- drivers/gpu/drm/drm_drv.c | 2 +- drivers/gpu/drm/drm_fb_helper.c | 16 ++++++++++++---- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 2 +- drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 2 +- drivers/gpu/drm/imx/dcss/dcss-kms.c | 2 +- drivers/gpu/drm/imx/imx-drm-core.c | 2 +- drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 2 +- drivers/gpu/drm/mcde/mcde_drv.c | 2 +- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 +- drivers/gpu/drm/meson/meson_drv.c | 2 +- drivers/gpu/drm/mxsfb/mxsfb_drv.c | 2 +- drivers/gpu/drm/pl111/pl111_drv.c | 2 +- drivers/gpu/drm/qxl/qxl_drv.c | 2 +- drivers/gpu/drm/rcar-du/rcar_du_drv.c | 2 +- drivers/gpu/drm/sti/sti_drv.c | 2 +- drivers/gpu/drm/stm/drv.c | 2 +- drivers/gpu/drm/sun4i/sun4i_drv.c | 2 +- drivers/gpu/drm/tidss/tidss_drv.c | 2 +- drivers/gpu/drm/tilcdc/tilcdc_drv.c | 2 +- drivers/gpu/drm/tiny/arcpgu.c | 2 +- drivers/gpu/drm/tiny/bochs.c | 2 +- drivers/gpu/drm/tve200/tve200_drv.c | 2 +- drivers/gpu/drm/vboxvideo/vbox_drv.c | 2 +- drivers/gpu/drm/vc4/vc4_drv.c | 2 +- drivers/gpu/drm/virtio/virtgpu_drv.c | 2 +- drivers/gpu/drm/xlnx/zynqmp_dpsub.c | 2 +- include/drm/drm_fb_helper.h | 12 ++++++++++++ 33 files changed, 58 insertions(+), 36 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index b03663f42cc9..f5fae3838cdc 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -2118,9 +2118,11 @@ static int amdgpu_pci_probe(struct pci_dev *pdev, !list_empty(&adev_to_drm(adev)->mode_config.connector_list)) { /* select 8 bpp console on low vram cards */ if (adev->gmc.real_vram_size <= (32*1024*1024))

• 	drm_fbdev_generic_setup(adev_to_drm(adev), 8);
  

• 	drm_fbdev_generic_setup(adev_to_drm(adev),
  

• 				DRM_FB_SET_OPTION(DRM_FB_BPP, 8));
  

  else

• 	drm_fbdev_generic_setup(adev_to_drm(adev), 32);
  

• 	drm_fbdev_generic_setup(adev_to_drm(adev),
  

• 				DRM_FB_SET_OPTION(DRM_FB_BPP, 32));
  

  }

  ret = amdgpu_debugfs_init(adev);

diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c index e89ae0ec60eb..636b0e989398 100644 --- a/drivers/gpu/drm/arm/hdlcd_drv.c +++ b/drivers/gpu/drm/arm/hdlcd_drv.c @@ -321,7 +321,7 @@ static int hdlcd_drm_bind(struct device *dev) if (ret) goto err_register;

• drm_fbdev_generic_setup(drm, 32);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c index d5aef21426cf..8f7c4f3136d5 100644 --- a/drivers/gpu/drm/arm/malidp_drv.c +++ b/drivers/gpu/drm/arm/malidp_drv.c @@ -863,7 +863,7 @@ static int malidp_bind(struct device *dev) if (ret) goto register_fail;

• drm_fbdev_generic_setup(drm, 32);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c index 7780b72de9e8..c16837fd1f8d 100644 --- a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c @@ -343,7 +343,7 @@ static int aspeed_gfx_probe(struct platform_device *pdev) if (ret) goto err_unload;

• drm_fbdev_generic_setup(&priv->drm, 32);

• drm_fbdev_generic_setup(&priv->drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32)); return 0;

err_unload: diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c index 7465c4f0156a..813e9af00983 100644 --- a/drivers/gpu/drm/ast/ast_drv.c +++ b/drivers/gpu/drm/ast/ast_drv.c @@ -126,7 +126,7 @@ static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (ret) return ret;

• drm_fbdev_generic_setup(dev, 32);

• drm_fbdev_generic_setup(dev, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

} diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c index 651e3c109360..e18dcd16ff8a 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c @@ -760,7 +760,7 @@ static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev) if (ret) goto err_unload;

• drm_fbdev_generic_setup(ddev, 24);

• drm_fbdev_generic_setup(ddev, DRM_FB_SET_OPTION(DRM_FB_BPP, 24));

  return 0;

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 8214a0b1ab7f..6695937945a5 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -324,7 +324,7 @@ void drm_minor_release(struct drm_minor *minor)

• if (ret)
  

• 	return ret;
  

• • drm_fbdev_generic_setup(drm, 32);
    

• • drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));
    

  • return 0;
    

  • }

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index d265a73313c9..f626947bb9b9 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -2501,8 +2501,16 @@ static const struct drm_client_funcs drm_fbdev_client_funcs = { /**

• drm_fbdev_generic_setup() - Setup generic fbdev emulation
• @dev: DRM device

• • @preferred_bpp: Preferred bits per pixel for the device.

• •             @dev->mode_config.preferred_depth is used if this is zero.
    

• • @options: options for the registered framebuffer.
• • The @options parameter is a multi-field parameter that can contain
• • different options for the emulated framebuffer device registered.
• • The options must be set using DRM_FB_SET_OPTION() and obtained using
• • DRM_FB_GET_OPTION(). The options field are the following:
• • • DRM_FB_BPP: bits per pixel for the device. If the field is not set,

• •           @dev->mode_config.preferred_depth is used instead.
    

Do I assume correctly that a driver that would need to set multiple options would do something like

drm_fbdev_generic_setup(dev, DRM_FB_SET_OPTION(DRM_FB_BPP, 32) | DRM_FB_SET_OPTION(DRM_FB_FW, 1));

? If so, I would rename DRM_FB_SET_OPTION() to DRM_FB_OPTION() as it's computing the value of the option bitfield, it doesn't actually set it. Apart from that,

Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com

• This function sets up generic fbdev emulation for drivers that supports
• dumb buffers with a virtual address and that can be mmap'ed.

@@ -2525,10 +2533,10 @@ static const struct drm_client_funcs drm_fbdev_client_funcs = {

• The fbdev is destroyed by drm_dev_unregister().

*/ -void drm_fbdev_generic_setup(struct drm_device *dev,

• 	     unsigned int preferred_bpp)
  

+void drm_fbdev_generic_setup(struct drm_device *dev, unsigned int options) { struct drm_fb_helper *fb_helper;

• unsigned int preferred_bpp = DRM_FB_GET_OPTION(DRM_FB_BPP, options); int ret;

  drm_WARN(dev, !dev->registered, "Device has not been registered.\n");

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c index 7a503bf08d0f..7bd8129388f2 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c @@ -334,7 +334,7 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev) if (ret < 0) goto put;

• drm_fbdev_generic_setup(drm, legacyfb_depth);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, legacyfb_depth));

  return 0;

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c index 2af51df6dca7..90aa59b77d31 100644 --- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c @@ -237,7 +237,7 @@ static int kirin_drm_bind(struct device *dev) if (ret) goto err_kms_cleanup;

• drm_fbdev_generic_setup(drm_dev, 32);

• drm_fbdev_generic_setup(drm_dev, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/imx/dcss/dcss-kms.c b/drivers/gpu/drm/imx/dcss/dcss-kms.c index 9b84df34a6a1..a4736ae85881 100644 --- a/drivers/gpu/drm/imx/dcss/dcss-kms.c +++ b/drivers/gpu/drm/imx/dcss/dcss-kms.c @@ -148,7 +148,7 @@ struct dcss_kms_dev *dcss_kms_attach(struct dcss_dev *dcss) if (ret) goto cleanup_crtc;

• drm_fbdev_generic_setup(drm, 32);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return kms;

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c index a57812ec36b1..4151f9b1b645 100644 --- a/drivers/gpu/drm/imx/imx-drm-core.c +++ b/drivers/gpu/drm/imx/imx-drm-core.c @@ -251,7 +251,7 @@ static int imx_drm_bind(struct device *dev) if (ret) goto err_poll_fini;

• drm_fbdev_generic_setup(drm, legacyfb_depth);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, legacyfb_depth));

  return 0;

diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c index 8eb0ad501a7b..9726c901677c 100644 --- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c +++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c @@ -1388,7 +1388,7 @@ static int ingenic_drm_bind(struct device *dev, bool has_components) goto err_clk_notifier_unregister; }

• drm_fbdev_generic_setup(drm, 32);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/mcde/mcde_drv.c b/drivers/gpu/drm/mcde/mcde_drv.c index e601baa87e55..1382a818c66b 100644 --- a/drivers/gpu/drm/mcde/mcde_drv.c +++ b/drivers/gpu/drm/mcde/mcde_drv.c @@ -238,7 +238,7 @@ static int mcde_drm_bind(struct device *dev) if (ret < 0) goto unbind;

• drm_fbdev_generic_setup(drm, 32);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index 247c6ff277ef..146f3f064e3e 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -393,7 +393,7 @@ static int mtk_drm_bind(struct device *dev) if (ret < 0) goto err_deinit;

• drm_fbdev_generic_setup(drm, 32);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c index 1b70938cfd2c..76463b940349 100644 --- a/drivers/gpu/drm/meson/meson_drv.c +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -350,7 +350,7 @@ static int meson_drv_bind_master(struct device *dev, bool has_components) if (ret) goto uninstall_irq;

• drm_fbdev_generic_setup(drm, 32);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c index 9d71c55a31c0..5e4c8e15eca7 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c @@ -357,7 +357,7 @@ static int mxsfb_probe(struct platform_device *pdev) if (ret) goto err_unload;

• drm_fbdev_generic_setup(drm, 32);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c index 520301b405f1..b9d1762051c8 100644 --- a/drivers/gpu/drm/pl111/pl111_drv.c +++ b/drivers/gpu/drm/pl111/pl111_drv.c @@ -308,7 +308,7 @@ static int pl111_amba_probe(struct amba_device *amba_dev, if (ret < 0) goto dev_put;

• drm_fbdev_generic_setup(drm, priv->variant->fb_bpp);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, priv->variant->fb_bpp));

  return 0;

diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c index 1cb6f0c224bb..fb7936bbdea8 100644 --- a/drivers/gpu/drm/qxl/qxl_drv.c +++ b/drivers/gpu/drm/qxl/qxl_drv.c @@ -122,7 +122,7 @@ qxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (ret) goto modeset_cleanup;

• drm_fbdev_generic_setup(&qdev->ddev, 32);

• drm_fbdev_generic_setup(&qdev->ddev, DRM_FB_SET_OPTION(DRM_FB_BPP, 32)); return 0;

modeset_cleanup: diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c index 957ea97541d5..c2c1523c5c47 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c @@ -681,7 +681,7 @@ static int rcar_du_probe(struct platform_device *pdev)

DRM_INFO("Device %s probed\n", dev_name(&pdev->dev));

• drm_fbdev_generic_setup(&rcdu->ddev, 32);

• drm_fbdev_generic_setup(&rcdu->ddev, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c index d858209cf8de..7fa653b28233 100644 --- a/drivers/gpu/drm/sti/sti_drv.c +++ b/drivers/gpu/drm/sti/sti_drv.c @@ -200,7 +200,7 @@ static int sti_bind(struct device *dev)

drm_mode_config_reset(ddev);

• drm_fbdev_generic_setup(ddev, 32);

• drm_fbdev_generic_setup(ddev, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c index 0da7cce2a1a2..36301d93e566 100644 --- a/drivers/gpu/drm/stm/drv.c +++ b/drivers/gpu/drm/stm/drv.c @@ -203,7 +203,7 @@ static int stm_drm_platform_probe(struct platform_device *pdev) if (ret) goto err_put;

• drm_fbdev_generic_setup(ddev, 16);

• drm_fbdev_generic_setup(ddev, DRM_FB_SET_OPTION(DRM_FB_BPP, 16));

  return 0;

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c index 275f7e4a03ae..2ec41525fe86 100644 --- a/drivers/gpu/drm/sun4i/sun4i_drv.c +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c @@ -112,7 +112,7 @@ static int sun4i_drv_bind(struct device *dev) if (ret) goto finish_poll;

• drm_fbdev_generic_setup(drm, 32);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tidss_drv.c index 04cfff89ee51..83bcfdc6d654 100644 --- a/drivers/gpu/drm/tidss/tidss_drv.c +++ b/drivers/gpu/drm/tidss/tidss_drv.c @@ -180,7 +180,7 @@ static int tidss_probe(struct platform_device *pdev) goto err_irq_uninstall; }

• drm_fbdev_generic_setup(ddev, 32);

• drm_fbdev_generic_setup(ddev, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  dev_dbg(dev, "%s done\n", __func__);

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index eee3c447fbac..e342ea5031c8 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -384,7 +384,7 @@ static int tilcdc_init(const struct drm_driver *ddrv, struct device *dev) goto init_failed; priv->is_registered = true;

• drm_fbdev_generic_setup(ddev, bpp);

• drm_fbdev_generic_setup(ddev, DRM_FB_SET_OPTION(DRM_FB_BPP, bpp)); return 0;

init_failed: diff --git a/drivers/gpu/drm/tiny/arcpgu.c b/drivers/gpu/drm/tiny/arcpgu.c index f0fa3b15c341..7f291db460e9 100644 --- a/drivers/gpu/drm/tiny/arcpgu.c +++ b/drivers/gpu/drm/tiny/arcpgu.c @@ -392,7 +392,7 @@ static int arcpgu_probe(struct platform_device *pdev) if (ret) goto err_unload;

• drm_fbdev_generic_setup(&arcpgu->drm, 16);

• drm_fbdev_generic_setup(&arcpgu->drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 16));

  return 0;

diff --git a/drivers/gpu/drm/tiny/bochs.c b/drivers/gpu/drm/tiny/bochs.c index ed971c8bb446..fc52d9e7d50e 100644 --- a/drivers/gpu/drm/tiny/bochs.c +++ b/drivers/gpu/drm/tiny/bochs.c @@ -663,7 +663,7 @@ static int bochs_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent if (ret) goto err_free_dev;

• drm_fbdev_generic_setup(dev, 32);

• drm_fbdev_generic_setup(dev, DRM_FB_SET_OPTION(DRM_FB_BPP, 32)); return ret;

err_free_dev: diff --git a/drivers/gpu/drm/tve200/tve200_drv.c b/drivers/gpu/drm/tve200/tve200_drv.c index 6d9d2921abf4..737cebb655a0 100644 --- a/drivers/gpu/drm/tve200/tve200_drv.c +++ b/drivers/gpu/drm/tve200/tve200_drv.c @@ -226,7 +226,7 @@ static int tve200_probe(struct platform_device *pdev) * Passing in 16 here will make the RGB565 mode the default * Passing in 32 will use XRGB8888 mode */

• drm_fbdev_generic_setup(drm, 16);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 16));

  return 0;

diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c b/drivers/gpu/drm/vboxvideo/vbox_drv.c index f4f2bd79a7cb..fbe1f7368d53 100644 --- a/drivers/gpu/drm/vboxvideo/vbox_drv.c +++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c @@ -79,7 +79,7 @@ static int vbox_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (ret) goto err_irq_fini;

• drm_fbdev_generic_setup(&vbox->ddev, 32);

• drm_fbdev_generic_setup(&vbox->ddev, DRM_FB_SET_OPTION(DRM_FB_BPP, 32));

  return 0;

diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 162bc18e7497..ecd2b41b87b3 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -291,7 +291,7 @@ static int vc4_drm_bind(struct device *dev) if (ret < 0) goto unbind_all;

• drm_fbdev_generic_setup(drm, 16);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 16));

  return 0;

diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c index 5f25a8d15464..ef1e1b6e8cac 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.c +++ b/drivers/gpu/drm/virtio/virtgpu_drv.c @@ -128,7 +128,7 @@ static int virtio_gpu_probe(struct virtio_device *vdev) if (ret) goto err_deinit;

• drm_fbdev_generic_setup(vdev->priv, 32);

• drm_fbdev_generic_setup(vdev->priv, DRM_FB_SET_OPTION(DRM_FB_BPP, 32)); return 0;

err_deinit: diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c index 824b510e337b..2937e72d9fac 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c @@ -135,7 +135,7 @@ static int zynqmp_dpsub_drm_init(struct zynqmp_dpsub *dpsub) goto err_poll_fini;

/* Initialize fbdev generic emulation. */

• drm_fbdev_generic_setup(drm, 24);

• drm_fbdev_generic_setup(drm, DRM_FB_SET_OPTION(DRM_FB_BPP, 24));

  return 0;

diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index 3af4624368d8..1da3ef76f499 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -35,6 +35,7 @@ struct drm_fb_helper; #include <drm/drm_client.h> #include <drm/drm_crtc.h> #include <drm/drm_device.h> +#include <linux/bitfield.h> #include <linux/kgdb.h>

enum mode_set_atomic { @@ -42,6 +43,17 @@ enum mode_set_atomic { ENTER_ATOMIC_MODE_SET, };

+#define DRM_FB_BPP_MASK GENMASK(7, 0)

+/* Using the GNU statement expression extension */ +#define DRM_FB_SET_OPTION(option, value) \

• ({ \

• WARN_ON(!FIELD_FIT(option##_MASK, value));	\
  

• FIELD_PREP(option##_MASK, value);		\
  

• })

+#define DRM_FB_GET_OPTION(option, word) FIELD_GET(option##_MASK, word)

/**

• struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
• @fb_width: fbdev width