+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2012 The Chromium OS Authors.
*
* (C) Copyright 2010
* Petr Stetiar <ynezz@true.cz>
*
- * SPDX-License-Identifier: GPL-2.0+
- *
* Contains stolen code from ddcprobe project which is:
* Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
*/
uint x_mm, y_mm;
unsigned int ha, hbl, hso, hspw, hborder;
unsigned int va, vbl, vso, vspw, vborder;
+ struct edid_detailed_timing *t = (struct edid_detailed_timing *)buf;
/* Edid contains pixel clock in terms of 10KHz */
set_entry(&timing->pixelclock, (buf[0] + (buf[1] << 8)) * 10000);
set_entry(&timing->vback_porch, vbl - vso - vspw);
set_entry(&timing->vsync_len, vspw);
+ timing->flags = 0;
+ if (EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(*t))
+ timing->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
+ else
+ timing->flags |= DISPLAY_FLAGS_HSYNC_LOW;
+ if (EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(*t))
+ timing->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
+ else
+ timing->flags |= DISPLAY_FLAGS_VSYNC_LOW;
+
+ if (EDID_DETAILED_TIMING_FLAG_INTERLACED(*t))
+ timing->flags = DISPLAY_FLAGS_INTERLACED;
+
debug("Detailed mode clock %u Hz, %d mm x %d mm\n"
" %04x %04x %04x %04x hborder %x\n"
" %04x %04x %04x %04x vborder %x\n",
va + vbl, vborder);
}
+/**
+ * Check if HDMI vendor specific data block is present in CEA block
+ * @param info CEA extension block
+ * @return true if block is found
+ */
+static bool cea_is_hdmi_vsdb_present(struct edid_cea861_info *info)
+{
+ u8 end, i = 0;
+
+ /* check for end of data block */
+ end = info->dtd_offset;
+ if (end == 0)
+ end = sizeof(info->data);
+ if (end < 4 || end > sizeof(info->data))
+ return false;
+ end -= 4;
+
+ while (i < end) {
+ /* Look for vendor specific data block of appropriate size */
+ if ((EDID_CEA861_DB_TYPE(*info, i) == EDID_CEA861_DB_VENDOR) &&
+ (EDID_CEA861_DB_LEN(*info, i) >= 5)) {
+ u8 *db = &info->data[i + 1];
+ u32 oui = db[0] | (db[1] << 8) | (db[2] << 16);
+
+ if (oui == HDMI_IEEE_OUI)
+ return true;
+ }
+ i += EDID_CEA861_DB_LEN(*info, i) + 1;
+ }
+
+ return false;
+}
+
int edid_get_timing(u8 *buf, int buf_size, struct display_timing *timing,
int *panel_bits_per_colourp)
{
((edid->video_input_definition & 0x70) >> 3) + 4;
}
+ timing->hdmi_monitor = false;
+ if (edid->extension_flag && (buf_size >= EDID_EXT_SIZE)) {
+ struct edid_cea861_info *info =
+ (struct edid_cea861_info *)(buf + sizeof(*edid));
+
+ if (info->extension_tag == EDID_CEA861_EXTENSION_TAG)
+ timing->hdmi_monitor = cea_is_hdmi_vsdb_present(info);
+ }
+
return 0;
}
h_total = h_active + h_blanking;
v_total = v_active + v_blanking;
- if (v_total * h_total)
+ if (v_total > 0 && h_total > 0)
vfreq = pixclock / (v_total * h_total);
else
vfreq = 1; /* Error case */