drivers/gpu/drm/sti/sti_vid.c

   1 /*
   2  * Copyright (C) STMicroelectronics SA 2014
   3  * Author: Fabien Dessenne <fabien.dessenne@st.com> for STMicroelectronics.
   4  * License terms:  GNU General Public License (GPL), version 2
   5  */
   6
   7 #include <drm/drmP.h>
   8
   9 #include "sti_plane.h"
  10 #include "sti_vid.h"
  11 #include "sti_vtg.h"
  12
  13 /* Registers */
  14 #define VID_CTL                 0x00
  15 #define VID_ALP                 0x04
  16 #define VID_CLF                 0x08
  17 #define VID_VPO                 0x0C
  18 #define VID_VPS                 0x10
  19 #define VID_KEY1                0x28
  20 #define VID_KEY2                0x2C
  21 #define VID_MPR0                0x30
  22 #define VID_MPR1                0x34
  23 #define VID_MPR2                0x38
  24 #define VID_MPR3                0x3C
  25 #define VID_MST                 0x68
  26 #define VID_BC                  0x70
  27 #define VID_TINT                0x74
  28 #define VID_CSAT                0x78
  29
  30 /* Registers values */
  31 #define VID_CTL_IGNORE          (BIT(31) | BIT(30))
  32 #define VID_CTL_PSI_ENABLE      (BIT(2) | BIT(1) | BIT(0))
  33 #define VID_ALP_OPAQUE          0x00000080
  34 #define VID_BC_DFLT             0x00008000
  35 #define VID_TINT_DFLT           0x00000000
  36 #define VID_CSAT_DFLT           0x00000080
  37 /* YCbCr to RGB BT709:
  38  * R = Y+1.5391Cr
  39  * G = Y-0.4590Cr-0.1826Cb
  40  * B = Y+1.8125Cb */
  41 #define VID_MPR0_BT709          0x0A800000
  42 #define VID_MPR1_BT709          0x0AC50000
  43 #define VID_MPR2_BT709          0x07150545
  44 #define VID_MPR3_BT709          0x00000AE8
  45 /* YCbCr to RGB BT709:
  46  * R = Y+1.3711Cr
  47  * G = Y-0.6992Cr-0.3359Cb
  48  * B = Y+1.7344Cb
  49  */
  50 #define VID_MPR0_BT601          0x0A800000
  51 #define VID_MPR1_BT601          0x0AAF0000
  52 #define VID_MPR2_BT601          0x094E0754
  53 #define VID_MPR3_BT601          0x00000ADD
  54
  55 #define VID_MIN_HD_HEIGHT       720
  56
  57 #define DBGFS_DUMP(reg) seq_printf(s, "\n  %-25s 0x%08X", #reg, \
  58                                    readl(vid->regs + reg))
  59
  60 static void vid_dbg_ctl(struct seq_file *s, int val)
  61 {
  62         val = val >> 30;
  63         seq_puts(s, "\t");
  64
  65         if (!(val & 1))
  66                 seq_puts(s, "NOT ");
  67         seq_puts(s, "ignored on main mixer - ");
  68
  69         if (!(val & 2))
  70                 seq_puts(s, "NOT ");
  71         seq_puts(s, "ignored on aux mixer");
  72 }
  73
  74 static void vid_dbg_vpo(struct seq_file *s, int val)
  75 {
  76         seq_printf(s, "\txdo:%4d\tydo:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF);
  77 }
  78
  79 static void vid_dbg_vps(struct seq_file *s, int val)
  80 {
  81         seq_printf(s, "\txds:%4d\tyds:%4d", val & 0x0FFF, (val >> 16) & 0x0FFF);
  82 }
  83
  84 static void vid_dbg_mst(struct seq_file *s, int val)
  85 {
  86         if (val & 1)
  87                 seq_puts(s, "\tBUFFER UNDERFLOW!");
  88 }
  89
  90 static int vid_dbg_show(struct seq_file *s, void *arg)
  91 {
  92         struct drm_info_node *node = s->private;
  93         struct sti_vid *vid = (struct sti_vid *)node->info_ent->data;
  94         struct drm_device *dev = node->minor->dev;
  95         int ret;
  96
  97         ret = mutex_lock_interruptible(&dev->struct_mutex);
  98         if (ret)
  99                 return ret;
 100
 101         seq_printf(s, "VID: (vaddr= 0x%p)", vid->regs);
 102
 103         DBGFS_DUMP(VID_CTL);
 104         vid_dbg_ctl(s, readl(vid->regs + VID_CTL));
 105         DBGFS_DUMP(VID_ALP);
 106         DBGFS_DUMP(VID_CLF);
 107         DBGFS_DUMP(VID_VPO);
 108         vid_dbg_vpo(s, readl(vid->regs + VID_VPO));
 109         DBGFS_DUMP(VID_VPS);
 110         vid_dbg_vps(s, readl(vid->regs + VID_VPS));
 111         DBGFS_DUMP(VID_KEY1);
 112         DBGFS_DUMP(VID_KEY2);
 113         DBGFS_DUMP(VID_MPR0);
 114         DBGFS_DUMP(VID_MPR1);
 115         DBGFS_DUMP(VID_MPR2);
 116         DBGFS_DUMP(VID_MPR3);
 117         DBGFS_DUMP(VID_MST);
 118         vid_dbg_mst(s, readl(vid->regs + VID_MST));
 119         DBGFS_DUMP(VID_BC);
 120         DBGFS_DUMP(VID_TINT);
 121         DBGFS_DUMP(VID_CSAT);
 122         seq_puts(s, "\n");
 123
 124         mutex_unlock(&dev->struct_mutex);
 125         return 0;
 126 }
 127
 128 static struct drm_info_list vid_debugfs_files[] = {
 129         { "vid", vid_dbg_show, 0, NULL },
 130 };
 131
 132 static int vid_debugfs_init(struct sti_vid *vid, struct drm_minor *minor)
 133 {
 134         unsigned int i;
 135
 136         for (i = 0; i < ARRAY_SIZE(vid_debugfs_files); i++)
 137                 vid_debugfs_files[i].data = vid;
 138
 139         return drm_debugfs_create_files(vid_debugfs_files,
 140                                         ARRAY_SIZE(vid_debugfs_files),
 141                                         minor->debugfs_root, minor);
 142 }
 143
 144 void sti_vid_commit(struct sti_vid *vid,
 145                     struct drm_plane_state *state)
 146 {
 147         struct drm_crtc *crtc = state->crtc;
 148         struct drm_display_mode *mode = &crtc->mode;
 149         int dst_x = state->crtc_x;
 150         int dst_y = state->crtc_y;
 151         int dst_w = clamp_val(state->crtc_w, 0, mode->crtc_hdisplay - dst_x);
 152         int dst_h = clamp_val(state->crtc_h, 0, mode->crtc_vdisplay - dst_y);
 153         int src_h = state->src_h >> 16;
 154         u32 val, ydo, xdo, yds, xds;
 155
 156         /* Input / output size
 157          * Align to upper even value */
 158         dst_w = ALIGN(dst_w, 2);
 159         dst_h = ALIGN(dst_h, 2);
 160
 161         /* Unmask */
 162         val = readl(vid->regs + VID_CTL);
 163         val &= ~VID_CTL_IGNORE;
 164         writel(val, vid->regs + VID_CTL);
 165
 166         ydo = sti_vtg_get_line_number(*mode, dst_y);
 167         yds = sti_vtg_get_line_number(*mode, dst_y + dst_h - 1);
 168         xdo = sti_vtg_get_pixel_number(*mode, dst_x);
 169         xds = sti_vtg_get_pixel_number(*mode, dst_x + dst_w - 1);
 170
 171         writel((ydo << 16) | xdo, vid->regs + VID_VPO);
 172         writel((yds << 16) | xds, vid->regs + VID_VPS);
 173
 174         /* Color conversion parameters */
 175         if (src_h >= VID_MIN_HD_HEIGHT) {
 176                 writel(VID_MPR0_BT709, vid->regs + VID_MPR0);
 177                 writel(VID_MPR1_BT709, vid->regs + VID_MPR1);
 178                 writel(VID_MPR2_BT709, vid->regs + VID_MPR2);
 179                 writel(VID_MPR3_BT709, vid->regs + VID_MPR3);
 180         } else {
 181                 writel(VID_MPR0_BT601, vid->regs + VID_MPR0);
 182                 writel(VID_MPR1_BT601, vid->regs + VID_MPR1);
 183                 writel(VID_MPR2_BT601, vid->regs + VID_MPR2);
 184                 writel(VID_MPR3_BT601, vid->regs + VID_MPR3);
 185         }
 186 }
 187
 188 void sti_vid_disable(struct sti_vid *vid)
 189 {
 190         u32 val;
 191
 192         /* Mask */
 193         val = readl(vid->regs + VID_CTL);
 194         val |= VID_CTL_IGNORE;
 195         writel(val, vid->regs + VID_CTL);
 196 }
 197
 198 static void sti_vid_init(struct sti_vid *vid)
 199 {
 200         /* Enable PSI, Mask layer */
 201         writel(VID_CTL_PSI_ENABLE | VID_CTL_IGNORE, vid->regs + VID_CTL);
 202
 203         /* Opaque */
 204         writel(VID_ALP_OPAQUE, vid->regs + VID_ALP);
 205
 206         /* Brightness, contrast, tint, saturation */
 207         writel(VID_BC_DFLT, vid->regs + VID_BC);
 208         writel(VID_TINT_DFLT, vid->regs + VID_TINT);
 209         writel(VID_CSAT_DFLT, vid->regs + VID_CSAT);
 210 }
 211
 212 struct sti_vid *sti_vid_create(struct device *dev, struct drm_device *drm_dev,
 213                                int id, void __iomem *baseaddr)
 214 {
 215         struct sti_vid *vid;
 216
 217         vid = devm_kzalloc(dev, sizeof(*vid), GFP_KERNEL);
 218         if (!vid) {
 219                 DRM_ERROR("Failed to allocate memory for VID\n");
 220                 return NULL;
 221         }
 222
 223         vid->dev = dev;
 224         vid->regs = baseaddr;
 225         vid->id = id;
 226
 227         sti_vid_init(vid);
 228
 229         if (vid_debugfs_init(vid, drm_dev->primary))
 230                 DRM_ERROR("VID debugfs setup failed\n");
 231
 232         return vid;
 233 }