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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9c9a8468de
because the hardware limitation,The initial color depth must set to 32bpp and must set the FB Offset of the display hardware to 128Byte alignment, which is used to solve the display problem at 800x600 and 1440x900 resolution under 16bpp. Signed-off-by: Tian Tao <tiantao6@hisilicon.com> Signed-off-by: Gong junjie <gongjunjie2@huawei.com> Acked-by: Xinliang Liu <xinliang.liu@linaro.org> Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/1583466184-7060-4-git-send-email-tiantao6@hisilicon.com
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Hisilicon Hibmc SoC drm driver
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*
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* Based on the bochs drm driver.
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*
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* Copyright (c) 2016 Huawei Limited.
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*
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* Author:
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* Rongrong Zou <zourongrong@huawei.com>
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* Rongrong Zou <zourongrong@gmail.com>
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* Jianhua Li <lijianhua@huawei.com>
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*/
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#include <linux/pci.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_gem.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_gem_vram_helper.h>
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#include <drm/drm_print.h>
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#include "hibmc_drm_drv.h"
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int hibmc_mm_init(struct hibmc_drm_private *hibmc)
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{
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struct drm_vram_mm *vmm;
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int ret;
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struct drm_device *dev = hibmc->dev;
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vmm = drm_vram_helper_alloc_mm(dev,
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pci_resource_start(dev->pdev, 0),
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hibmc->fb_size);
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if (IS_ERR(vmm)) {
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ret = PTR_ERR(vmm);
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DRM_ERROR("Error initializing VRAM MM; %d\n", ret);
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return ret;
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}
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return 0;
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}
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void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
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{
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if (!hibmc->dev->vram_mm)
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return;
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drm_vram_helper_release_mm(hibmc->dev);
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}
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int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
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struct drm_mode_create_dumb *args)
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{
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return drm_gem_vram_fill_create_dumb(file, dev, 0, 128, args);
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}
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const struct drm_mode_config_funcs hibmc_mode_funcs = {
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.mode_valid = drm_vram_helper_mode_valid,
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = drm_atomic_helper_commit,
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.fb_create = drm_gem_fb_create,
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};
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