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