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