diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index fac4efc7dfe2..7df26d4b7ad8 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3924,6 +3924,110 @@ static int validate_displayid(u8 *displayid, int length, int idx) return 0; } +static struct drm_display_mode *drm_mode_displayid_detailed(struct drm_device *dev, + struct displayid_detailed_timings_1 *timings) +{ + struct drm_display_mode *mode; + unsigned pixel_clock = (timings->pixel_clock[0] | + (timings->pixel_clock[1] << 8) | + (timings->pixel_clock[2] << 16)); + unsigned hactive = (timings->hactive[0] | timings->hactive[1] << 8) + 1; + unsigned hblank = (timings->hblank[0] | timings->hblank[1] << 8) + 1; + unsigned hsync = (timings->hsync[0] | (timings->hsync[1] & 0x7f) << 8) + 1; + unsigned hsync_width = (timings->hsw[0] | timings->hsw[1] << 8) + 1; + unsigned vactive = (timings->vactive[0] | timings->vactive[1] << 8) + 1; + unsigned vblank = (timings->vblank[0] | timings->vblank[1] << 8) + 1; + unsigned vsync = (timings->vsync[0] | (timings->vsync[1] & 0x7f) << 8) + 1; + unsigned vsync_width = (timings->vsw[0] | timings->vsw[1] << 8) + 1; + bool hsync_positive = (timings->hsync[1] >> 7) & 0x1; + bool vsync_positive = (timings->vsync[1] >> 7) & 0x1; + mode = drm_mode_create(dev); + if (!mode) + return NULL; + + mode->clock = pixel_clock * 10; + mode->hdisplay = hactive; + mode->hsync_start = mode->hdisplay + hsync; + mode->hsync_end = mode->hsync_start + hsync_width; + mode->htotal = mode->hdisplay + hblank; + + mode->vdisplay = vactive; + mode->vsync_start = mode->vdisplay + vsync; + mode->vsync_end = mode->vsync_start + vsync_width; + mode->vtotal = mode->vdisplay + vblank; + + mode->flags = 0; + mode->flags |= hsync_positive ? DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC; + mode->flags |= vsync_positive ? DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC; + mode->type = DRM_MODE_TYPE_DRIVER; + + if (timings->flags & 0x80) + mode->type |= DRM_MODE_TYPE_PREFERRED; + mode->vrefresh = drm_mode_vrefresh(mode); + drm_mode_set_name(mode); + + return mode; +} + +static int add_displayid_detailed_1_modes(struct drm_connector *connector, + struct displayid_block *block) +{ + struct displayid_detailed_timing_block *det = (struct displayid_detailed_timing_block *)block; + int i; + int num_timings; + struct drm_display_mode *newmode; + int num_modes = 0; + /* blocks must be multiple of 20 bytes length */ + if (block->num_bytes % 20) + return 0; + + num_timings = block->num_bytes / 20; + for (i = 0; i < num_timings; i++) { + struct displayid_detailed_timings_1 *timings = &det->timings[i]; + + newmode = drm_mode_displayid_detailed(connector->dev, timings); + if (!newmode) + continue; + + drm_mode_probed_add(connector, newmode); + num_modes++; + } + return num_modes; +} + +static int add_displayid_detailed_modes(struct drm_connector *connector, + struct edid *edid) +{ + u8 *displayid; + int ret; + int idx = 1; + int length = EDID_LENGTH; + struct displayid_block *block; + int num_modes = 0; + + displayid = drm_find_displayid_extension(edid); + if (!displayid) + return 0; + + ret = validate_displayid(displayid, length, idx); + if (ret) + return 0; + + idx += sizeof(struct displayid_hdr); + while (block = (struct displayid_block *)&displayid[idx], + idx + sizeof(struct displayid_block) <= length && + idx + sizeof(struct displayid_block) + block->num_bytes <= length && + block->num_bytes > 0) { + idx += block->num_bytes + sizeof(struct displayid_block); + switch (block->tag) { + case DATA_BLOCK_TYPE_1_DETAILED_TIMING: + num_modes += add_displayid_detailed_1_modes(connector, block); + break; + } + } + return num_modes; +} + /** * drm_add_edid_modes - add modes from EDID data, if available * @connector: connector we're probing @@ -3969,6 +4073,7 @@ int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid) num_modes += add_established_modes(connector, edid); num_modes += add_cea_modes(connector, edid); num_modes += add_alternate_cea_modes(connector, edid); + num_modes += add_displayid_detailed_modes(connector, edid); if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF) num_modes += add_inferred_modes(connector, edid); @@ -4260,6 +4365,9 @@ static int drm_parse_display_id(struct drm_connector *connector, if (ret) return ret; break; + case DATA_BLOCK_TYPE_1_DETAILED_TIMING: + /* handled in mode gathering code. */ + break; default: DRM_DEBUG_KMS("found DisplayID tag 0x%x, unhandled\n", block->tag); break; |