8a2dbdecce
[ Upstream commit b74d921b900b6ce38c6247c0a1c86be9f3746493 ]
We encountered a kernel panic issue that callback data will be NULL when
it's using in ovl irq handler. There is a timing issue between
mtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank().
To resolve this issue, we use the flow to register/unregister vblank cb:
- Register callback function and callback data when crtc creates.
- Unregister callback function and callback data when crtc destroies.
With this solution, we can assure callback data will not be NULL when
vblank is disable.
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20220321072320.15019-1-rex-bc.chen@mediatek.com/
Fixes: 9b0704988b ("drm/mediatek: Register vblank callback function")
Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: jason-jh.lin <jason-jh.lin@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
106 lines
4.2 KiB
C
106 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2020 MediaTek Inc.
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*/
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#ifndef _MTK_DISP_DRV_H_
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#define _MTK_DISP_DRV_H_
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#include <linux/soc/mediatek/mtk-cmdq.h>
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#include "mtk_drm_plane.h"
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int mtk_aal_clk_enable(struct device *dev);
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void mtk_aal_clk_disable(struct device *dev);
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void mtk_aal_config(struct device *dev, unsigned int w,
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unsigned int h, unsigned int vrefresh,
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unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
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void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state);
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void mtk_aal_start(struct device *dev);
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void mtk_aal_stop(struct device *dev);
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void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state);
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int mtk_ccorr_clk_enable(struct device *dev);
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void mtk_ccorr_clk_disable(struct device *dev);
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void mtk_ccorr_config(struct device *dev, unsigned int w,
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unsigned int h, unsigned int vrefresh,
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unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
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void mtk_ccorr_start(struct device *dev);
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void mtk_ccorr_stop(struct device *dev);
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void mtk_color_bypass_shadow(struct device *dev);
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int mtk_color_clk_enable(struct device *dev);
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void mtk_color_clk_disable(struct device *dev);
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void mtk_color_config(struct device *dev, unsigned int w,
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unsigned int h, unsigned int vrefresh,
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unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
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void mtk_color_start(struct device *dev);
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void mtk_dither_set_common(void __iomem *regs, struct cmdq_client_reg *cmdq_reg,
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unsigned int bpc, unsigned int cfg,
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unsigned int dither_en, struct cmdq_pkt *cmdq_pkt);
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void mtk_dpi_start(struct device *dev);
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void mtk_dpi_stop(struct device *dev);
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void mtk_dsi_ddp_start(struct device *dev);
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void mtk_dsi_ddp_stop(struct device *dev);
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int mtk_gamma_clk_enable(struct device *dev);
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void mtk_gamma_clk_disable(struct device *dev);
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void mtk_gamma_config(struct device *dev, unsigned int w,
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unsigned int h, unsigned int vrefresh,
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unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
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void mtk_gamma_set(struct device *dev, struct drm_crtc_state *state);
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void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state);
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void mtk_gamma_start(struct device *dev);
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void mtk_gamma_stop(struct device *dev);
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void mtk_ovl_bgclr_in_on(struct device *dev);
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void mtk_ovl_bgclr_in_off(struct device *dev);
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void mtk_ovl_bypass_shadow(struct device *dev);
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int mtk_ovl_clk_enable(struct device *dev);
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void mtk_ovl_clk_disable(struct device *dev);
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void mtk_ovl_config(struct device *dev, unsigned int w,
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unsigned int h, unsigned int vrefresh,
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unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
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int mtk_ovl_layer_check(struct device *dev, unsigned int idx,
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struct mtk_plane_state *mtk_state);
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void mtk_ovl_layer_config(struct device *dev, unsigned int idx,
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struct mtk_plane_state *state,
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struct cmdq_pkt *cmdq_pkt);
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unsigned int mtk_ovl_layer_nr(struct device *dev);
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void mtk_ovl_layer_on(struct device *dev, unsigned int idx,
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struct cmdq_pkt *cmdq_pkt);
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void mtk_ovl_layer_off(struct device *dev, unsigned int idx,
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struct cmdq_pkt *cmdq_pkt);
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void mtk_ovl_start(struct device *dev);
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void mtk_ovl_stop(struct device *dev);
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unsigned int mtk_ovl_supported_rotations(struct device *dev);
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void mtk_ovl_register_vblank_cb(struct device *dev,
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void (*vblank_cb)(void *),
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void *vblank_cb_data);
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void mtk_ovl_unregister_vblank_cb(struct device *dev);
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void mtk_ovl_enable_vblank(struct device *dev);
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void mtk_ovl_disable_vblank(struct device *dev);
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void mtk_rdma_bypass_shadow(struct device *dev);
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int mtk_rdma_clk_enable(struct device *dev);
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void mtk_rdma_clk_disable(struct device *dev);
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void mtk_rdma_config(struct device *dev, unsigned int width,
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unsigned int height, unsigned int vrefresh,
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unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
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unsigned int mtk_rdma_layer_nr(struct device *dev);
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void mtk_rdma_layer_config(struct device *dev, unsigned int idx,
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struct mtk_plane_state *state,
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struct cmdq_pkt *cmdq_pkt);
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void mtk_rdma_start(struct device *dev);
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void mtk_rdma_stop(struct device *dev);
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void mtk_rdma_register_vblank_cb(struct device *dev,
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void (*vblank_cb)(void *),
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void *vblank_cb_data);
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void mtk_rdma_unregister_vblank_cb(struct device *dev);
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void mtk_rdma_enable_vblank(struct device *dev);
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void mtk_rdma_disable_vblank(struct device *dev);
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#endif
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