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From:   Tian Tao <tiantao6@hisilicon.com>
To:     <puck.chen@hisilicon.com>, <airlied@linux.ie>, <daniel@ffwll.ch>,
        <tzimmermann@suse.de>, <kraxel@redhat.com>,
        <alexander.deucher@amd.com>, <tglx@linutronix.de>,
        <dri-devel@lists.freedesktop.org>, <xinliang.liu@linaro.org>,
        <linux-kernel@vger.kernel.org>
CC:     <linuxarm@huawei.com>
Subject: [PATCH] drm/hisilicon: Fixed pcie resource conflict using the general API
Date:   Fri, 21 Feb 2020 13:55:23 +0800
Message-ID: <1582264523-61170-1-git-send-email-tiantao6@hisilicon.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

the kernel provide the drm_fb_helper_remove_conflicting_pci_framebuffer
to remvoe the pcie resource conflict,there is no need to driver it again.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
---
 drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c | 22 +++++-----------------
 1 file changed, 5 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
index 7ebe831..0f7dba7 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.c
@@ -47,22 +47,6 @@ static irqreturn_t hibmc_drm_interrupt(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
-static void hibmc_remove_framebuffers(struct pci_dev *pdev)
-{
-	struct apertures_struct *ap;
-
-	ap = alloc_apertures(1);
-	if (!ap)
-		return;
-
-	ap->ranges[0].base = pci_resource_start(pdev, 0);
-	ap->ranges[0].size = pci_resource_len(pdev, 0);
-
-	drm_fb_helper_remove_conflicting_framebuffers(ap, "hibmcdrmfb", false);
-
-	kfree(ap);
-}
-
 static struct drm_driver hibmc_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 	.fops			= &hibmc_fops,
@@ -343,7 +327,11 @@ static int hibmc_pci_probe(struct pci_dev *pdev,
 	struct drm_device *dev;
 	int ret;
 
-	hibmc_remove_framebuffers(pdev);
+	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)) {
-- 
2.7.4