1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2016 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.com>
5 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
6 * Copyright (C) 2014 Endless Mobile
7 */
8
9 #include <linux/export.h>
10
11 #include "meson_drv.h"
12 #include "meson_registers.h"
13 #include "meson_vpp.h"
14
15 /**
16 * DOC: Video Post Processing
17 *
18 * VPP Handles all the Post Processing after the Scanout from the VIU
19 * We handle the following post processings :
20 *
21 * - Postblend, Blends the OSD1 only
22 * We exclude OSD2, VS1, VS1 and Preblend output
23 * - Vertical OSD Scaler for OSD1 only, we disable vertical scaler and
24 * use it only for interlace scanout
25 * - Intermediate FIFO with default Amlogic values
26 *
27 * What is missing :
28 *
29 * - Preblend for video overlay pre-scaling
30 * - OSD2 support for cursor framebuffer
31 * - Video pre-scaling before postblend
32 * - Full Vertical/Horizontal OSD scaling to support TV overscan
33 * - HDR conversion
34 */
35
meson_vpp_setup_mux(struct meson_drm * priv,unsigned int mux)36 void meson_vpp_setup_mux(struct meson_drm *priv, unsigned int mux)
37 {
38 writel(mux, priv->io_base + _REG(VPU_VIU_VENC_MUX_CTRL));
39 }
40
41 static unsigned int vpp_filter_coefs_4point_bspline[] = {
42 0x15561500, 0x14561600, 0x13561700, 0x12561800,
43 0x11551a00, 0x11541b00, 0x10541c00, 0x0f541d00,
44 0x0f531e00, 0x0e531f00, 0x0d522100, 0x0c522200,
45 0x0b522300, 0x0b512400, 0x0a502600, 0x0a4f2700,
46 0x094e2900, 0x084e2a00, 0x084d2b00, 0x074c2c01,
47 0x074b2d01, 0x064a2f01, 0x06493001, 0x05483201,
48 0x05473301, 0x05463401, 0x04453601, 0x04433702,
49 0x04423802, 0x03413a02, 0x03403b02, 0x033f3c02,
50 0x033d3d03
51 };
52
meson_vpp_write_scaling_filter_coefs(struct meson_drm * priv,const unsigned int * coefs,bool is_horizontal)53 static void meson_vpp_write_scaling_filter_coefs(struct meson_drm *priv,
54 const unsigned int *coefs,
55 bool is_horizontal)
56 {
57 int i;
58
59 writel_relaxed(is_horizontal ? VPP_SCALE_HORIZONTAL_COEF : 0,
60 priv->io_base + _REG(VPP_OSD_SCALE_COEF_IDX));
61 for (i = 0; i < 33; i++)
62 writel_relaxed(coefs[i],
63 priv->io_base + _REG(VPP_OSD_SCALE_COEF));
64 }
65
66 static const uint32_t vpp_filter_coefs_bicubic[] = {
67 0x00800000, 0x007f0100, 0xff7f0200, 0xfe7f0300,
68 0xfd7e0500, 0xfc7e0600, 0xfb7d0800, 0xfb7c0900,
69 0xfa7b0b00, 0xfa7a0dff, 0xf9790fff, 0xf97711ff,
70 0xf87613ff, 0xf87416fe, 0xf87218fe, 0xf8701afe,
71 0xf76f1dfd, 0xf76d1ffd, 0xf76b21fd, 0xf76824fd,
72 0xf76627fc, 0xf76429fc, 0xf7612cfc, 0xf75f2ffb,
73 0xf75d31fb, 0xf75a34fb, 0xf75837fa, 0xf7553afa,
74 0xf8523cfa, 0xf8503ff9, 0xf84d42f9, 0xf84a45f9,
75 0xf84848f8
76 };
77
meson_vpp_write_vd_scaling_filter_coefs(struct meson_drm * priv,const unsigned int * coefs,bool is_horizontal)78 static void meson_vpp_write_vd_scaling_filter_coefs(struct meson_drm *priv,
79 const unsigned int *coefs,
80 bool is_horizontal)
81 {
82 int i;
83
84 writel_relaxed(is_horizontal ? VPP_SCALE_HORIZONTAL_COEF : 0,
85 priv->io_base + _REG(VPP_SCALE_COEF_IDX));
86 for (i = 0; i < 33; i++)
87 writel_relaxed(coefs[i],
88 priv->io_base + _REG(VPP_SCALE_COEF));
89 }
90
meson_vpp_init(struct meson_drm * priv)91 void meson_vpp_init(struct meson_drm *priv)
92 {
93 /* set dummy data default YUV black */
94 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL))
95 writel_relaxed(0x108080, priv->io_base + _REG(VPP_DUMMY_DATA1));
96 else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM)) {
97 writel_bits_relaxed(0xff << 16, 0xff << 16,
98 priv->io_base + _REG(VIU_MISC_CTRL1));
99 writel_relaxed(VPP_PPS_DUMMY_DATA_MODE,
100 priv->io_base + _REG(VPP_DOLBY_CTRL));
101 writel_relaxed(0x1020080,
102 priv->io_base + _REG(VPP_DUMMY_DATA1));
103 writel_relaxed(0x42020,
104 priv->io_base + _REG(VPP_DUMMY_DATA));
105 } else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A))
106 writel_relaxed(0xf, priv->io_base + _REG(DOLBY_PATH_CTRL));
107
108 /* Initialize vpu fifo control registers */
109 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A))
110 writel_relaxed(VPP_OFIFO_SIZE_DEFAULT,
111 priv->io_base + _REG(VPP_OFIFO_SIZE));
112 else
113 writel_bits_relaxed(VPP_OFIFO_SIZE_MASK, 0x77f,
114 priv->io_base + _REG(VPP_OFIFO_SIZE));
115 writel_relaxed(VPP_POSTBLEND_HOLD_LINES(4) | VPP_PREBLEND_HOLD_LINES(4),
116 priv->io_base + _REG(VPP_HOLD_LINES));
117
118 if (!meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
119 /* Turn off preblend */
120 writel_bits_relaxed(VPP_PREBLEND_ENABLE, 0,
121 priv->io_base + _REG(VPP_MISC));
122
123 /* Turn off POSTBLEND */
124 writel_bits_relaxed(VPP_POSTBLEND_ENABLE, 0,
125 priv->io_base + _REG(VPP_MISC));
126
127 /* Force all planes off */
128 writel_bits_relaxed(VPP_OSD1_POSTBLEND | VPP_OSD2_POSTBLEND |
129 VPP_VD1_POSTBLEND | VPP_VD2_POSTBLEND |
130 VPP_VD1_PREBLEND | VPP_VD2_PREBLEND, 0,
131 priv->io_base + _REG(VPP_MISC));
132
133 /* Setup default VD settings */
134 writel_relaxed(4096,
135 priv->io_base + _REG(VPP_PREBLEND_VD1_H_START_END));
136 writel_relaxed(4096,
137 priv->io_base + _REG(VPP_BLEND_VD2_H_START_END));
138 }
139
140 /* Disable Scalers */
141 writel_relaxed(0, priv->io_base + _REG(VPP_OSD_SC_CTRL0));
142 writel_relaxed(0, priv->io_base + _REG(VPP_OSD_VSC_CTRL0));
143 writel_relaxed(0, priv->io_base + _REG(VPP_OSD_HSC_CTRL0));
144
145 /* Set horizontal/vertical bank length and enable video scale out */
146 writel_relaxed(VPP_VSC_BANK_LENGTH(4) | VPP_HSC_BANK_LENGTH(4) |
147 VPP_SC_VD_EN_ENABLE,
148 priv->io_base + _REG(VPP_SC_MISC));
149
150 /* Enable minus black level for vadj1 */
151 writel_relaxed(VPP_MINUS_BLACK_LVL_VADJ1_ENABLE,
152 priv->io_base + _REG(VPP_VADJ_CTRL));
153
154 /* Write in the proper filter coefficients. */
155 meson_vpp_write_scaling_filter_coefs(priv,
156 vpp_filter_coefs_4point_bspline, false);
157 meson_vpp_write_scaling_filter_coefs(priv,
158 vpp_filter_coefs_4point_bspline, true);
159
160 /* Write the VD proper filter coefficients. */
161 meson_vpp_write_vd_scaling_filter_coefs(priv, vpp_filter_coefs_bicubic,
162 false);
163 meson_vpp_write_vd_scaling_filter_coefs(priv, vpp_filter_coefs_bicubic,
164 true);
165 }
166