xref: /linux/drivers/gpu/drm/loongson/lsdc_gfxpll.h (revision a940daa52167e9db8ecce82213813b735a9d9f23)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (C) 2023 Loongson Technology Corporation Limited
4  */
5 
6 #ifndef __LSDC_GFXPLL_H__
7 #define __LSDC_GFXPLL_H__
8 
9 #include <drm/drm_device.h>
10 
11 struct loongson_gfxpll;
12 
13 struct loongson_gfxpll_parms {
14 	unsigned int ref_clock;
15 	unsigned int div_ref;
16 	unsigned int loopc;
17 	unsigned int div_out_dc;
18 	unsigned int div_out_gmc;
19 	unsigned int div_out_gpu;
20 };
21 
22 struct loongson_gfxpll_funcs {
23 	int (*init)(struct loongson_gfxpll * const this);
24 
25 	int (*update)(struct loongson_gfxpll * const this,
26 		      struct loongson_gfxpll_parms const *pin);
27 
28 	void (*get_rates)(struct loongson_gfxpll * const this,
29 			  unsigned int *dc, unsigned int *gmc, unsigned int *gpu);
30 
31 	void (*print)(struct loongson_gfxpll * const this,
32 		      struct drm_printer *printer, bool verbose);
33 };
34 
35 struct loongson_gfxpll {
36 	struct drm_device *ddev;
37 	void __iomem *mmio;
38 
39 	/* PLL register offset */
40 	u32 reg_base;
41 	/* PLL register size in bytes */
42 	u32 reg_size;
43 
44 	const struct loongson_gfxpll_funcs *funcs;
45 
46 	struct loongson_gfxpll_parms parms;
47 };
48 
49 int loongson_gfxpll_create(struct drm_device *ddev,
50 			   struct loongson_gfxpll **ppout);
51 
52 #endif
53