| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (C) STMicroelectronics SA 2014 |
| 4 | * Author: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics. |
| 5 | */ |
| 6 | #include <linux/seq_file.h> |
| 7 | |
| 8 | #include <drm/drm_debugfs.h> |
| 9 | #include <drm/drm_file.h> |
| 10 | #include <drm/drm_print.h> |
| 11 | |
| 12 | #include "sti_plane.h" |
| 13 | #include "sti_vid.h" |
| 14 | #include "sti_vtg.h" |
| 15 | |
| 16 | /* Registers */ |
| 17 | #define VID_CTL 0x00 |
| 18 | #define VID_ALP 0x04 |
| 19 | #define VID_CLF 0x08 |
| 20 | #define VID_VPO 0x0C |
| 21 | #define VID_VPS 0x10 |
| 22 | #define VID_KEY1 0x28 |
| 23 | #define VID_KEY2 0x2C |
| 24 | #define VID_MPR0 0x30 |
| 25 | #define VID_MPR1 0x34 |
| 26 | #define VID_MPR2 0x38 |
| 27 | #define VID_MPR3 0x3C |
| 28 | #define VID_MST 0x68 |
| 29 | #define VID_BC 0x70 |
| 30 | #define VID_TINT 0x74 |
| 31 | #define VID_CSAT 0x78 |
| 32 | |
| 33 | /* Registers values */ |
| 34 | #define VID_CTL_IGNORE (BIT(31) | BIT(30)) |
| 35 | #define VID_CTL_PSI_ENABLE (BIT(2) | BIT(1) | BIT(0)) |
| 36 | #define VID_ALP_OPAQUE 0x00000080 |
| 37 | #define VID_BC_DFLT 0x00008000 |
| 38 | #define VID_TINT_DFLT 0x00000000 |
| 39 | #define VID_CSAT_DFLT 0x00000080 |
| 40 | /* YCbCr to RGB BT709: |
| 41 | * R = Y+1.5391Cr |
| 42 | * G = Y-0.4590Cr-0.1826Cb |
| 43 | * B = Y+1.8125Cb */ |
| 44 | #define VID_MPR0_BT709 0x0A800000 |
| 45 | #define VID_MPR1_BT709 0x0AC50000 |
| 46 | #define VID_MPR2_BT709 0x07150545 |
| 47 | #define VID_MPR3_BT709 0x00000AE8 |
| 48 | /* YCbCr to RGB BT709: |
| 49 | * R = Y+1.3711Cr |
| 50 | * G = Y-0.6992Cr-0.3359Cb |
| 51 | * B = Y+1.7344Cb |
| 52 | */ |
| 53 | #define VID_MPR0_BT601 0x0A800000 |
| 54 | #define VID_MPR1_BT601 0x0AAF0000 |
| 55 | #define VID_MPR2_BT601 0x094E0754 |
| 56 | #define VID_MPR3_BT601 0x00000ADD |
| 57 | |
| 58 | #define VID_MIN_HD_HEIGHT 720 |
| 59 | |
| 60 | #define DBGFS_DUMP(reg) seq_printf(s, "\n %-25s 0x%08X", #reg, \ |
| 61 | readl(vid->regs + reg)) |
| 62 | |
| 63 | static void vid_dbg_ctl(struct seq_file *s, int val) |
| 64 | { |
| 65 | val = val >> 30; |
| 66 | seq_putc(s, '\t'); |
| 67 | |
| 68 | if (!(val & 1)) |
| 69 | seq_puts(s, "NOT "); |
| 70 | seq_puts(s, "ignored on main mixer - "); |
| 71 | |
| 72 | if (!(val & 2)) |
| 73 | seq_puts(s, "NOT "); |
| 74 | seq_puts(s, "ignored on aux mixer"); |
| 75 | } |
| 76 | |
| 77 | static void vid_dbg_vpo(struct seq_file *s, int val) |
| 78 | { |
| 79 | seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF); |
| 80 | } |
| 81 | |
| 82 | static void vid_dbg_vps(struct seq_file *s, int val) |
| 83 | { |
| 84 | seq_printf(s, "\txds:%4d\tyds:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF); |
| 85 | } |
| 86 | |
| 87 | static void vid_dbg_mst(struct seq_file *s, int val) |
| 88 | { |
| 89 | if (val & 1) |
| 90 | seq_puts(s, "\tBUFFER UNDERFLOW!"); |
| 91 | } |
| 92 | |
| 93 | static int vid_dbg_show(struct seq_file *s, void *arg) |
| 94 | { |
| 95 | struct drm_info_node *node = s->private; |
| 96 | struct sti_vid *vid = (struct sti_vid *)node->info_ent->data; |
| 97 | |
| 98 | seq_printf(s, "VID: (vaddr= 0x%p)", vid->regs); |
| 99 | |
| 100 | DBGFS_DUMP(VID_CTL); |
| 101 | vid_dbg_ctl(s, readl(vid->regs + VID_CTL)); |
| 102 | DBGFS_DUMP(VID_ALP); |
| 103 | DBGFS_DUMP(VID_CLF); |
| 104 | DBGFS_DUMP(VID_VPO); |
| 105 | vid_dbg_vpo(s, readl(vid->regs + VID_VPO)); |
| 106 | DBGFS_DUMP(VID_VPS); |
| 107 | vid_dbg_vps(s, readl(vid->regs + VID_VPS)); |
| 108 | DBGFS_DUMP(VID_KEY1); |
| 109 | DBGFS_DUMP(VID_KEY2); |
| 110 | DBGFS_DUMP(VID_MPR0); |
| 111 | DBGFS_DUMP(VID_MPR1); |
| 112 | DBGFS_DUMP(VID_MPR2); |
| 113 | DBGFS_DUMP(VID_MPR3); |
| 114 | DBGFS_DUMP(VID_MST); |
| 115 | vid_dbg_mst(s, readl(vid->regs + VID_MST)); |
| 116 | DBGFS_DUMP(VID_BC); |
| 117 | DBGFS_DUMP(VID_TINT); |
| 118 | DBGFS_DUMP(VID_CSAT); |
| 119 | seq_putc(s, '\n'); |
| 120 | return 0; |
| 121 | } |
| 122 | |
| 123 | static struct drm_info_list vid_debugfs_files[] = { |
| 124 | { "vid", vid_dbg_show, 0, NULL }, |
| 125 | }; |
| 126 | |
| 127 | void vid_debugfs_init(struct sti_vid *vid, struct drm_minor *minor) |
| 128 | { |
| 129 | unsigned int i; |
| 130 | |
| 131 | for (i = 0; i < ARRAY_SIZE(vid_debugfs_files); i++) |
| 132 | vid_debugfs_files[i].data = vid; |
| 133 | |
| 134 | drm_debugfs_create_files(vid_debugfs_files, |
| 135 | ARRAY_SIZE(vid_debugfs_files), |
| 136 | minor->debugfs_root, minor); |
| 137 | } |
| 138 | |
| 139 | void sti_vid_commit(struct sti_vid *vid, |
| 140 | struct drm_plane_state *state) |
| 141 | { |
| 142 | struct drm_crtc *crtc = state->crtc; |
| 143 | struct drm_display_mode *mode = &crtc->mode; |
| 144 | int dst_x = state->crtc_x; |
| 145 | int dst_y = state->crtc_y; |
| 146 | int dst_w = clamp_val(state->crtc_w, 0, mode->hdisplay - dst_x); |
| 147 | int dst_h = clamp_val(state->crtc_h, 0, mode->vdisplay - dst_y); |
| 148 | int src_h = state->src_h >> 16; |
| 149 | u32 val, ydo, xdo, yds, xds; |
| 150 | |
| 151 | /* Input / output size |
| 152 | * Align to upper even value */ |
| 153 | dst_w = ALIGN(dst_w, 2); |
| 154 | dst_h = ALIGN(dst_h, 2); |
| 155 | |
| 156 | /* Unmask */ |
| 157 | val = readl(vid->regs + VID_CTL); |
| 158 | val &= ~VID_CTL_IGNORE; |
| 159 | writel(val, vid->regs + VID_CTL); |
| 160 | |
| 161 | ydo = sti_vtg_get_line_number(*mode, dst_y); |
| 162 | yds = sti_vtg_get_line_number(*mode, dst_y + dst_h - 1); |
| 163 | xdo = sti_vtg_get_pixel_number(*mode, dst_x); |
| 164 | xds = sti_vtg_get_pixel_number(*mode, dst_x + dst_w - 1); |
| 165 | |
| 166 | writel((ydo << 16) | xdo, vid->regs + VID_VPO); |
| 167 | writel((yds << 16) | xds, vid->regs + VID_VPS); |
| 168 | |
| 169 | /* Color conversion parameters */ |
| 170 | if (src_h >= VID_MIN_HD_HEIGHT) { |
| 171 | writel(VID_MPR0_BT709, vid->regs + VID_MPR0); |
| 172 | writel(VID_MPR1_BT709, vid->regs + VID_MPR1); |
| 173 | writel(VID_MPR2_BT709, vid->regs + VID_MPR2); |
| 174 | writel(VID_MPR3_BT709, vid->regs + VID_MPR3); |
| 175 | } else { |
| 176 | writel(VID_MPR0_BT601, vid->regs + VID_MPR0); |
| 177 | writel(VID_MPR1_BT601, vid->regs + VID_MPR1); |
| 178 | writel(VID_MPR2_BT601, vid->regs + VID_MPR2); |
| 179 | writel(VID_MPR3_BT601, vid->regs + VID_MPR3); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | void sti_vid_disable(struct sti_vid *vid) |
| 184 | { |
| 185 | u32 val; |
| 186 | |
| 187 | /* Mask */ |
| 188 | val = readl(vid->regs + VID_CTL); |
| 189 | val |= VID_CTL_IGNORE; |
| 190 | writel(val, vid->regs + VID_CTL); |
| 191 | } |
| 192 | |
| 193 | static void sti_vid_init(struct sti_vid *vid) |
| 194 | { |
| 195 | /* Enable PSI, Mask layer */ |
| 196 | writel(VID_CTL_PSI_ENABLE | VID_CTL_IGNORE, vid->regs + VID_CTL); |
| 197 | |
| 198 | /* Opaque */ |
| 199 | writel(VID_ALP_OPAQUE, vid->regs + VID_ALP); |
| 200 | |
| 201 | /* Brightness, contrast, tint, saturation */ |
| 202 | writel(VID_BC_DFLT, vid->regs + VID_BC); |
| 203 | writel(VID_TINT_DFLT, vid->regs + VID_TINT); |
| 204 | writel(VID_CSAT_DFLT, vid->regs + VID_CSAT); |
| 205 | } |
| 206 | |
| 207 | struct sti_vid *sti_vid_create(struct device *dev, struct drm_device *drm_dev, |
| 208 | int id, void __iomem *baseaddr) |
| 209 | { |
| 210 | struct sti_vid *vid; |
| 211 | |
| 212 | vid = devm_kzalloc(dev, sizeof(*vid), GFP_KERNEL); |
| 213 | if (!vid) { |
| 214 | DRM_ERROR("Failed to allocate memory for VID\n"); |
| 215 | return NULL; |
| 216 | } |
| 217 | |
| 218 | vid->dev = dev; |
| 219 | vid->regs = baseaddr; |
| 220 | vid->id = id; |
| 221 | |
| 222 | sti_vid_init(vid); |
| 223 | |
| 224 | return vid; |
| 225 | } |