xref: /openbmc/linux/drivers/gpu/drm/sprd/sprd_dpu.h (revision b07bcf34)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2020 Unisoc Inc.
4  */
5 
6 #ifndef __SPRD_DPU_H__
7 #define __SPRD_DPU_H__
8 
9 #include <linux/bug.h>
10 #include <linux/delay.h>
11 #include <linux/device.h>
12 #include <linux/kernel.h>
13 #include <linux/platform_device.h>
14 #include <linux/string.h>
15 #include <video/videomode.h>
16 
17 #include <drm/drm_crtc.h>
18 #include <drm/drm_fourcc.h>
19 #include <drm/drm_print.h>
20 #include <drm/drm_vblank.h>
21 #include <uapi/drm/drm_mode.h>
22 
23 /* DPU Layer registers offset */
24 #define DPU_LAY_REG_OFFSET	0x30
25 
26 enum {
27 	SPRD_DPU_IF_DPI,
28 	SPRD_DPU_IF_EDPI,
29 	SPRD_DPU_IF_LIMIT
30 };
31 
32 /**
33  * Sprd DPU context structure
34  *
35  * @base: DPU controller base address
36  * @irq: IRQ number to install the handler for
37  * @if_type: The type of DPI interface, default is DPI mode.
38  * @vm: videomode structure to use for DPU and DPI initialization
39  * @stopped: indicates whether DPU are stopped
40  * @wait_queue: wait queue, used to wait for DPU shadow register update done and
41  * DPU stop register done interrupt signal.
42  * @evt_update: wait queue condition for DPU shadow register
43  * @evt_stop: wait queue condition for DPU stop register
44  */
45 struct dpu_context {
46 	void __iomem *base;
47 	int irq;
48 	u8 if_type;
49 	struct videomode vm;
50 	bool stopped;
51 	wait_queue_head_t wait_queue;
52 	bool evt_update;
53 	bool evt_stop;
54 };
55 
56 /**
57  * Sprd DPU device structure
58  *
59  * @crtc: crtc object
60  * @drm: A point to drm device
61  * @ctx: DPU's implementation specific context object
62  */
63 struct sprd_dpu {
64 	struct drm_crtc base;
65 	struct drm_device *drm;
66 	struct dpu_context ctx;
67 };
68 
to_sprd_crtc(struct drm_crtc * crtc)69 static inline struct sprd_dpu *to_sprd_crtc(struct drm_crtc *crtc)
70 {
71 	return container_of(crtc, struct sprd_dpu, base);
72 }
73 
74 static inline void
dpu_reg_set(struct dpu_context * ctx,u32 offset,u32 set_bits)75 dpu_reg_set(struct dpu_context *ctx, u32 offset, u32 set_bits)
76 {
77 	u32 bits = readl_relaxed(ctx->base + offset);
78 
79 	writel(bits | set_bits, ctx->base + offset);
80 }
81 
82 static inline void
dpu_reg_clr(struct dpu_context * ctx,u32 offset,u32 clr_bits)83 dpu_reg_clr(struct dpu_context *ctx, u32 offset, u32 clr_bits)
84 {
85 	u32 bits = readl_relaxed(ctx->base + offset);
86 
87 	writel(bits & ~clr_bits, ctx->base + offset);
88 }
89 
90 static inline u32
layer_reg_rd(struct dpu_context * ctx,u32 offset,int index)91 layer_reg_rd(struct dpu_context *ctx, u32 offset, int index)
92 {
93 	u32 layer_offset = offset + index * DPU_LAY_REG_OFFSET;
94 
95 	return readl(ctx->base + layer_offset);
96 }
97 
98 static inline void
layer_reg_wr(struct dpu_context * ctx,u32 offset,u32 cfg_bits,int index)99 layer_reg_wr(struct dpu_context *ctx, u32 offset, u32 cfg_bits, int index)
100 {
101 	u32 layer_offset =  offset + index * DPU_LAY_REG_OFFSET;
102 
103 	writel(cfg_bits, ctx->base + layer_offset);
104 }
105 
106 void sprd_dpu_run(struct sprd_dpu *dpu);
107 void sprd_dpu_stop(struct sprd_dpu *dpu);
108 
109 #endif
110