1 // SPDX-License-Identifier: GPL-2.0
3 * Amlogic Meson Video Processing Unit driver
5 * Copyright (c) 2018 BayLibre, SAS.
12 #include <efi_loader.h>
13 #include <fdt_support.h>
16 #include <linux/sizes.h>
17 #include <asm/arch/mem.h>
18 #include <dm/device-internal.h>
19 #include <dm/uclass-internal.h>
21 #include "meson_vpu.h"
22 #include "meson_registers.h"
23 #include "simplefb_common.h"
25 #define MESON_VPU_OVERSCAN SZ_64K
27 /* Static variable for use in meson_vpu_rsv_fb() */
28 static struct meson_framebuffer {
36 bool meson_vpu_is_compatible(struct meson_vpu_priv *priv,
37 enum vpu_compatible family)
39 enum vpu_compatible compat = dev_get_driver_data(priv->dev);
41 return compat == family;
44 static int meson_vpu_setup_mode(struct udevice *dev, struct udevice *disp)
46 struct video_uc_platdata *uc_plat = dev_get_uclass_platdata(dev);
47 struct video_priv *uc_priv = dev_get_uclass_priv(dev);
48 struct display_timing timing;
53 ret = display_read_timing(disp, &timing);
55 debug("%s: Failed to read timings\n", __func__);
59 uc_priv->xsize = timing.hactive.typ;
60 uc_priv->ysize = timing.vactive.typ;
62 ret = display_enable(disp, 0, &timing);
67 /* CVBS has a fixed 720x480i (NTSC) and 720x576i (PAL) */
69 timing.flags = DISPLAY_FLAGS_INTERLACED;
74 uc_priv->bpix = VPU_MAX_LOG2_BPP;
76 meson_fb.is_cvbs = is_cvbs;
77 meson_fb.xsize = uc_priv->xsize;
78 meson_fb.ysize = uc_priv->ysize;
80 /* Move the framebuffer to the end of addressable ram */
81 meson_fb.fb_size = ALIGN(meson_fb.xsize * meson_fb.ysize *
82 ((1 << VPU_MAX_LOG2_BPP) / 8) +
83 MESON_VPU_OVERSCAN, EFI_PAGE_SIZE);
84 meson_fb.base = gd->bd->bi_dram[0].start +
85 gd->bd->bi_dram[0].size - meson_fb.fb_size;
87 /* Override the framebuffer address */
88 uc_plat->base = meson_fb.base;
90 meson_vpu_setup_plane(dev, timing.flags & DISPLAY_FLAGS_INTERLACED);
91 meson_vpu_setup_venc(dev, &timing, is_cvbs);
92 meson_vpu_setup_vclk(dev, &timing, is_cvbs);
94 video_set_flush_dcache(dev, 1);
99 static const struct udevice_id meson_vpu_ids[] = {
100 { .compatible = "amlogic,meson-gxbb-vpu", .data = VPU_COMPATIBLE_GXBB },
101 { .compatible = "amlogic,meson-gxl-vpu", .data = VPU_COMPATIBLE_GXL },
102 { .compatible = "amlogic,meson-gxm-vpu", .data = VPU_COMPATIBLE_GXM },
103 { .compatible = "amlogic,meson-g12a-vpu", .data = VPU_COMPATIBLE_G12A },
107 static int meson_vpu_probe(struct udevice *dev)
109 struct meson_vpu_priv *priv = dev_get_priv(dev);
110 struct udevice *disp;
113 /* Before relocation we don't need to do anything */
114 if (!(gd->flags & GD_FLG_RELOC))
119 priv->io_base = dev_remap_addr_index(dev, 0);
123 priv->hhi_base = dev_remap_addr_index(dev, 1);
127 priv->dmc_base = dev_remap_addr_index(dev, 2);
133 /* probe the display */
134 ret = uclass_get_device(UCLASS_DISPLAY, 0, &disp);
136 return meson_vpu_setup_mode(dev, ret ? NULL : disp);
139 static int meson_vpu_bind(struct udevice *dev)
141 struct video_uc_platdata *plat = dev_get_uclass_platdata(dev);
143 plat->size = VPU_MAX_WIDTH * VPU_MAX_HEIGHT *
144 (1 << VPU_MAX_LOG2_BPP) / 8;
149 #if defined(CONFIG_VIDEO_DT_SIMPLEFB)
150 static void meson_vpu_setup_simplefb(void *fdt)
152 const char *pipeline = NULL;
153 u64 mem_start, mem_size;
156 if (meson_fb.is_cvbs)
157 pipeline = "vpu-cvbs";
159 pipeline = "vpu-hdmi";
161 offset = meson_simplefb_fdt_match(fdt, pipeline);
163 eprintf("Cannot setup simplefb: node not found\n");
165 /* If simplefb is missing, add it as reserved memory */
166 meson_board_add_reserved_memory(fdt, meson_fb.base,
173 * SimpleFB will try to iomap the framebuffer, so we can't use
174 * fdt_add_mem_rsv on the memory area. Instead, the FB is stored
175 * at the end of the RAM and we strip this portion from the kernel
178 mem_start = gd->bd->bi_dram[0].start;
179 mem_size = gd->bd->bi_dram[0].size - meson_fb.fb_size;
180 ret = fdt_fixup_memory_banks(fdt, &mem_start, &mem_size, 1);
182 eprintf("Cannot setup simplefb: Error reserving memory\n");
186 ret = fdt_setup_simplefb_node(fdt, offset, meson_fb.base,
187 meson_fb.xsize, meson_fb.ysize,
188 meson_fb.xsize * 4, "x8r8g8b8");
190 eprintf("Cannot setup simplefb: Error setting properties\n");
194 void meson_vpu_rsv_fb(void *fdt)
196 if (!meson_fb.base || !meson_fb.xsize || !meson_fb.ysize)
199 #if defined(CONFIG_EFI_LOADER)
200 efi_add_memory_map(meson_fb.base, meson_fb.fb_size,
201 EFI_RESERVED_MEMORY_TYPE);
203 #if defined(CONFIG_VIDEO_DT_SIMPLEFB)
204 meson_vpu_setup_simplefb(fdt);
208 U_BOOT_DRIVER(meson_vpu) = {
211 .of_match = meson_vpu_ids,
212 .probe = meson_vpu_probe,
213 .bind = meson_vpu_bind,
214 .priv_auto = sizeof(struct meson_vpu_priv),
215 .flags = DM_FLAG_PRE_RELOC | DM_FLAG_REMOVE_WITH_PD_ON,