diff options
Diffstat (limited to 'drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index cc8e6968271..30af8f3e642 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -897,6 +897,51 @@ static int drm_gtf_modes_for_range(struct drm_connector *connector, return modes; } +static int drm_cvt_modes(struct drm_connector *connector, + struct detailed_timing *timing) +{ + int i, j, modes = 0; + struct drm_display_mode *newmode; + struct drm_device *dev = connector->dev; + struct cvt_timing *cvt; + const int rates[] = { 60, 85, 75, 60, 50 }; + + for (i = 0; i < 4; i++) { + int width, height; + cvt = &(timing->data.other_data.data.cvt[i]); + + height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 8) + 1) * 2; + switch (cvt->code[1] & 0xc0) { + case 0x00: + width = height * 4 / 3; + break; + case 0x40: + width = height * 16 / 9; + break; + case 0x80: + width = height * 16 / 10; + break; + case 0xc0: + width = height * 15 / 9; + break; + } + + for (j = 1; j < 5; j++) { + if (cvt->code[2] & (1 << j)) { + newmode = drm_cvt_mode(dev, width, height, + rates[j], j == 0, + false, false); + if (newmode) { + drm_mode_probed_add(connector, newmode); + modes++; + } + } + } + } + + return modes; +} + static int add_detailed_modes(struct drm_connector *connector, struct detailed_timing *timing, struct edid *edid, u32 quirks, int preferred) @@ -941,6 +986,9 @@ static int add_detailed_modes(struct drm_connector *connector, } } break; + case EDID_DETAIL_CVT_3BYTE: + modes += drm_cvt_modes(connector, timing); + break; default: break; } |