Commit a6f23857 authored by liyuting's avatar liyuting
Browse files

drm/phytium: Replace default efi fb0 with dc fb 

phytium inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IA51DT


CVE: NA

------------------------------------------------------------

When enable efi fb, replace the original efi fb0 when loading the
dc driver.

Fixes: b80df10f ("DRM: Phytium display DRM driver")
Signed-off-by: default avatarWangHao <wanghao1851@phytium.com.cn>
Signed-off-by: default avatarYang Xun <yangxun@phytium.com.cn>
Signed-off-by: default avatarWang Yinfeng <wangyinfeng@phytium.com.cn>
Signed-off-by: default avatarLi Yuting <liyuting2071@phytium.com.cn>
parent 65017336

drivers/gpu/drm/phytium/phytium_pci.c

+23 −0
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 


#include <linux/pci.h>

#include <drm/drm_drv.h>

#include <drm/drm_fb_helper.h>

#include <linux/dmaengine.h>

#include "phytium_display_drv.h"

#include "phytium_pci.h"
@@ -238,12 +239,34 @@ phytium_pci_private_fini(struct pci_dev *pdev, struct phytium_display_private *p 
	devm_kfree(&pdev->dev, pci_priv);

}



static int phytium_kick_out_firmware_fb(struct pci_dev *pdev)

{

	struct apertures_struct *ap;



	ap = alloc_apertures(1);

	if (!ap)

		return -ENOMEM;



	ap->ranges[0].base = pci_resource_start(pdev, 2);

	ap->ranges[0].size = pci_resource_len(pdev, 2);



	drm_fb_helper_remove_conflicting_framebuffers(ap, "phytiumdrmfb",

			false);

	kfree(ap);



	return 0;

}



static int phytium_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

{

	struct phytium_display_private *priv = NULL;

	struct drm_device *dev = NULL;

	int ret = 0;



	ret = phytium_kick_out_firmware_fb(pdev);

	if (ret)

		DRM_ERROR("failed to remove conflicting framebuffers\n");



	dev = drm_dev_alloc(&phytium_display_drm_driver, &pdev->dev);

	if (IS_ERR(dev)) {

		DRM_ERROR("failed to allocate drm_device\n");