drm/hisilicon: Fixed pcie resource conflict between drm and firmware

use the drm_fb_helper_remove_conflicting_pci_framebuffer to remove
the framebuffer initialized by fireware/bootloader to avoid resource
conflict.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1582524112-5628-1-git-send-email-tiantao6@hisilicon.com

diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
index 119135f..222356a 100644 (file)
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
@@ -327,6 +327,11 @@ static int hibmc_pci_probe(struct pci_dev *pdev,
        struct drm_device *dev;
        int ret;
 
+       ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev,
+                                                               "hibmcdrmfb");
+       if (ret)
+               return ret;
+
        dev = drm_dev_alloc(&hibmc_driver, &pdev->dev);
        if (IS_ERR(dev)) {
                DRM_ERROR("failed to allocate drm_device\n");