*/
static bool edid_is_valid(struct edid *edid)
{
- int i;
+ int i, score = 0;
u8 csum = 0;
u8 *raw_edid = (u8 *)edid;
- if (memcmp(edid->header, edid_header, sizeof(edid_header)))
- goto bad;
- if (edid->version != 1) {
- DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
+ for (i = 0; i < sizeof(edid_header); i++)
+ if (raw_edid[i] == edid_header[i])
+ score++;
+
+ if (score == 8) ;
+ else if (score >= 6) {
+ DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
+ memcpy(raw_edid, edid_header, sizeof(edid_header));
+ } else
goto bad;
- }
- if (edid->revision > 4)
- DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
for (i = 0; i < EDID_LENGTH; i++)
csum += raw_edid[i];
goto bad;
}
+ if (edid->version != 1) {
+ DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
+ goto bad;
+ }
+
+ if (edid->revision > 4)
+ DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
+
return 1;
bad:
3048, 3536, 0, 1600, 1603, 1609, 1682, 0,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) },
};
+static const int drm_num_dmt_modes =
+ sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
static struct drm_display_mode *drm_find_dmt(struct drm_device *dev,
int hsize, int vsize, int fresh)
{
- int i, count;
+ int i;
struct drm_display_mode *ptr, *mode;
- count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
mode = NULL;
- for (i = 0; i < count; i++) {
+ for (i = 0; i < drm_num_dmt_modes; i++) {
ptr = &drm_dmt_modes[i];
if (hsize == ptr->hdisplay &&
vsize == ptr->vdisplay &&
return modes;
}
+/*
+ * XXX fix this for:
+ * - GTF secondary curve formula
+ * - EDID 1.4 range offsets
+ * - CVT extended bits
+ */
+static bool
+mode_in_range(struct drm_display_mode *mode, struct detailed_timing *timing)
+{
+ struct detailed_data_monitor_range *range;
+ int hsync, vrefresh;
+
+ range = &timing->data.other_data.data.range;
+
+ hsync = drm_mode_hsync(mode);
+ vrefresh = drm_mode_vrefresh(mode);
+
+ if (hsync < range->min_hfreq_khz || hsync > range->max_hfreq_khz)
+ return false;
+
+ if (vrefresh < range->min_vfreq || vrefresh > range->max_vfreq)
+ return false;
+
+ if (range->pixel_clock_mhz && range->pixel_clock_mhz != 0xff) {
+ /* be forgiving since it's in units of 10MHz */
+ int max_clock = range->pixel_clock_mhz * 10 + 9;
+ max_clock *= 1000;
+ if (mode->clock > max_clock)
+ return false;
+ }
+
+ return true;
+}
+
+/*
+ * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
+ * need to account for them.
+ */
+static int drm_gtf_modes_for_range(struct drm_connector *connector,
+ struct detailed_timing *timing)
+{
+ int i, modes = 0;
+ struct drm_display_mode *newmode;
+ struct drm_device *dev = connector->dev;
+
+ for (i = 0; i < drm_num_dmt_modes; i++) {
+ if (mode_in_range(drm_dmt_modes + i, timing)) {
+ newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
+ if (newmode) {
+ drm_mode_probed_add(connector, newmode);
+ modes++;
+ }
+ }
+ }
+
+ 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)
+{
+ int i, modes = 0;
+ struct detailed_non_pixel *data = &timing->data.other_data;
+ int timing_level = standard_timing_level(edid);
+ int gtf = (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
+ struct drm_display_mode *newmode;
+ struct drm_device *dev = connector->dev;
+
+ if (timing->pixel_clock) {
+ newmode = drm_mode_detailed(dev, edid, timing, quirks);
+ if (!newmode)
+ return 0;
+
+ if (preferred)
+ newmode->type |= DRM_MODE_TYPE_PREFERRED;
+
+ drm_mode_probed_add(connector, newmode);
+ return 1;
+ }
+
+ /* other timing types */
+ switch (data->type) {
+ case EDID_DETAIL_MONITOR_RANGE:
+ if (gtf)
+ modes += drm_gtf_modes_for_range(connector, timing);
+ break;
+ case EDID_DETAIL_STD_MODES:
+ /* Six modes per detailed section */
+ for (i = 0; i < 6; i++) {
+ struct std_timing *std;
+ struct drm_display_mode *newmode;
+
+ std = &data->data.timings[i];
+ newmode = drm_mode_std(dev, std, edid->revision,
+ timing_level);
+ if (newmode) {
+ drm_mode_probed_add(connector, newmode);
+ modes++;
+ }
+ }
+ break;
+ case EDID_DETAIL_CVT_3BYTE:
+ modes += drm_cvt_modes(connector, timing);
+ break;
+ default:
+ break;
+ }
+
+ return modes;
+}
+
/**
- * add_detailed_modes - get detailed mode info from EDID data
+ * add_detailed_info - get detailed mode info from EDID data
* @connector: attached connector
* @edid: EDID block to scan
* @quirks: quirks to apply
static int add_detailed_info(struct drm_connector *connector,
struct edid *edid, u32 quirks)
{
- struct drm_device *dev = connector->dev;
- int i, j, modes = 0;
- int timing_level;
-
- timing_level = standard_timing_level(edid);
+ int i, modes = 0;
for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
struct detailed_timing *timing = &edid->detailed_timings[i];
- struct detailed_non_pixel *data = &timing->data.other_data;
- struct drm_display_mode *newmode;
-
- /* X server check is version 1.1 or higher */
- if (edid->version == 1 && edid->revision >= 1 &&
- !timing->pixel_clock) {
- /* Other timing or info */
- switch (data->type) {
- case EDID_DETAIL_MONITOR_SERIAL:
- break;
- case EDID_DETAIL_MONITOR_STRING:
- break;
- case EDID_DETAIL_MONITOR_RANGE:
- /* Get monitor range data */
- break;
- case EDID_DETAIL_MONITOR_NAME:
- break;
- case EDID_DETAIL_MONITOR_CPDATA:
- break;
- case EDID_DETAIL_STD_MODES:
- for (j = 0; j < 6; i++) {
- struct std_timing *std;
- struct drm_display_mode *newmode;
-
- std = &data->data.timings[j];
- newmode = drm_mode_std(dev, std,
- edid->revision,
- timing_level);
- if (newmode) {
- drm_mode_probed_add(connector, newmode);
- modes++;
- }
- }
- break;
- default:
- break;
- }
- } else {
- newmode = drm_mode_detailed(dev, edid, timing, quirks);
- if (!newmode)
- continue;
+ int preferred = (i == 0) && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
- /* First detailed mode is preferred */
- if (i == 0 && (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING))
- newmode->type |= DRM_MODE_TYPE_PREFERRED;
- drm_mode_probed_add(connector, newmode);
+ /* In 1.0, only timings are allowed */
+ if (!timing->pixel_clock && edid->version == 1 &&
+ edid->revision == 0)
+ continue;
- modes++;
- }
+ modes += add_detailed_modes(connector, timing, edid, quirks,
+ preferred);
}
return modes;
}
+
/**
* add_detailed_mode_eedid - get detailed mode info from addtional timing
* EDID block
static int add_detailed_info_eedid(struct drm_connector *connector,
struct edid *edid, u32 quirks)
{
- struct drm_device *dev = connector->dev;
- int i, j, modes = 0;
+ int i, modes = 0;
char *edid_ext = NULL;
struct detailed_timing *timing;
- struct detailed_non_pixel *data;
- struct drm_display_mode *newmode;
int edid_ext_num;
int start_offset, end_offset;
int timing_level;
for (i = start_offset; i < end_offset;
i += sizeof(struct detailed_timing)) {
timing = (struct detailed_timing *)(edid_ext + i);
- data = &timing->data.other_data;
- /* Detailed mode timing */
- if (timing->pixel_clock) {
- newmode = drm_mode_detailed(dev, edid, timing, quirks);
- if (!newmode)
- continue;
-
- drm_mode_probed_add(connector, newmode);
-
- modes++;
- continue;
- }
-
- /* Other timing or info */
- switch (data->type) {
- case EDID_DETAIL_MONITOR_SERIAL:
- break;
- case EDID_DETAIL_MONITOR_STRING:
- break;
- case EDID_DETAIL_MONITOR_RANGE:
- /* Get monitor range data */
- break;
- case EDID_DETAIL_MONITOR_NAME:
- break;
- case EDID_DETAIL_MONITOR_CPDATA:
- break;
- case EDID_DETAIL_STD_MODES:
- /* Five modes per detailed section */
- for (j = 0; j < 5; i++) {
- struct std_timing *std;
- struct drm_display_mode *newmode;
-
- std = &data->data.timings[j];
- newmode = drm_mode_std(dev, std,
- edid->revision,
- timing_level);
- if (newmode) {
- drm_mode_probed_add(connector, newmode);
- modes++;
- }
- }
- break;
- default:
- break;
- }
+ modes += add_detailed_modes(connector, timing, edid, quirks, 0);
}
return modes;
struct i2c_adapter *adapter,
char *buf, int len)
{
- int ret;
+ int i;
- ret = drm_do_probe_ddc_edid(adapter, buf, len);
- if (ret != 0) {
- goto end;
- }
- if (!edid_is_valid((struct edid *)buf)) {
- dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
- drm_get_connector_name(connector));
- ret = -1;
+ for (i = 0; i < 4; i++) {
+ if (drm_do_probe_ddc_edid(adapter, buf, len))
+ return -1;
+ if (edid_is_valid((struct edid *)buf))
+ return 0;
}
-end:
- return ret;
+
+ /* repeated checksum failures; warn, but carry on */
+ dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
+ drm_get_connector_name(connector));
+ return -1;
}
/**
ptr->vdisplay > vdisplay)
continue;
}
+ if (drm_mode_vrefresh(ptr) > 61)
+ continue;
mode = drm_mode_duplicate(dev, ptr);
if (mode) {
drm_mode_probed_add(connector, mode);
projects / firefly-linux-kernel-4.4.55.git / blobdiff