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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL] 5k tiled display issues (dual DP)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95207#c14">Comment # 14</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL] 5k tiled display issues (dual DP)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95207">bug 95207</a>
from <span class="vcard"><a class="email" href="mailto:bugs@bzatek.net" title="Tomas Bzatek <bugs@bzatek.net>"> <span class="fn">Tomas Bzatek</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=123391" name="attach_123391" title="dmesg with type1 timings parsed">attachment 123391</a> <a href="attachment.cgi?id=123391&action=edit" title="dmesg with type1 timings parsed">[details]</a></span>
dmesg with type1 timings parsed
So with the above three patches I'm actually able to see the native resolution
modes parsed. Attaching fresh dmesg, the interesting part is this one:
<span class="quote">> [ 0.969147] [drm:intel_dp_detect] [CONNECTOR:42:DP-1]
> [ 0.983551] [drm:drm_parse_display_id] base revision v1.2, edid length 128, bytes 121, prod_id 0 ext_count 0
> [ 0.983552] [drm:drm_parse_display_id] block id 0x12, rev 0, len 22
> [ 0.983553] [drm:drm_parse_display_id] tile cap 0x82
> [ 0.983553] [drm:drm_parse_display_id] tile_size 2560 x 2880
> [ 0.983558] [drm:drm_parse_display_id] topo num tiles 2x1, location 1x0
> [ 0.983567] [drm:drm_parse_display_id] vend DEL
> [ 0.983568] [drm:drm_parse_display_id] block id 0x3, rev 0, len 60
> [ 0.983594] [drm:drm_parse_display_id] Modeline "3840x2160@60" 533240 3840 3887 3919 3999 2160 2162 2167 2221 +hsync -vsync
> [ 0.983595] [drm:drm_parse_display_id] pixel clock 533240 kHz, preferred = 1, interlaced = 0, aspect_ratio = 4, stereo_3d_support = 0
> [ 0.983596] [drm:drm_parse_display_id] hactive = 3840, hblank = 160, hsync_offset = 48, hsync_width = 32
> [ 0.983597] [drm:drm_parse_display_id] vactive = 2160, vblank = 62, vsync_offset = 3, vsync_width = 5
> [ 0.983598] [drm:drm_parse_display_id] hblank_start = 3839, width = 3840, hblank_end = 3999, hsync_start = 3887, hsync_end = htotal = 3919
> [ 0.983608] [drm:drm_parse_display_id] vblank_start = 2159, height = 2160, vblank_end = 2221, vsync_start = 2162, vsync_end = vtotal = 2167
> [ 0.983609] [drm:drm_parse_display_id] Modeline "2560x2880@30" 238240 2560 2607 2639 2719 2880 2882 2892 2920 +hsync -vsync
> [ 0.983610] [drm:drm_parse_display_id] pixel clock 238240 kHz, preferred = 0, interlaced = 0, aspect_ratio = 4, stereo_3d_support = 0
> [ 0.983611] [drm:drm_parse_display_id] hactive = 2560, hblank = 160, hsync_offset = 48, hsync_width = 32
> [ 0.983611] [drm:drm_parse_display_id] vactive = 2880, vblank = 41, vsync_offset = 3, vsync_width = 10
> [ 0.983617] [drm:drm_parse_display_id] hblank_start = 2559, width = 2560, hblank_end = 2719, hsync_start = 2607, hsync_end = htotal = 2639
> [ 0.983618] [drm:drm_parse_display_id] vblank_start = 2879, height = 2880, vblank_end = 2920, vsync_start = 2882, vsync_end = vtotal = 2892
> [ 0.983619] [drm:drm_parse_display_id] Modeline "2560x2880@60" 483240 2560 2607 2639 2719 2880 2882 2892 2961 +hsync -vsync
> [ 0.983620] [drm:drm_parse_display_id] pixel clock 483240 kHz, preferred = 0, interlaced = 0, aspect_ratio = 4, stereo_3d_support = 0
> [ 0.983620] [drm:drm_parse_display_id] hactive = 2560, hblank = 160, hsync_offset = 48, hsync_width = 32
> [ 0.983625] [drm:drm_parse_display_id] vactive = 2880, vblank = 82, vsync_offset = 3, vsync_width = 10
> [ 0.983626] [drm:drm_parse_display_id] hblank_start = 2559, width = 2560, hblank_end = 2719, hsync_start = 2607, hsync_end = htotal = 2639
> [ 0.983627] [drm:drm_parse_display_id] vblank_start = 2879, height = 2880, vblank_end = 2961, vsync_start = 2882, vsync_end = vtotal = 2892
> [ 0.983628] [drm:drm_parse_display_id] block id 0x7, rev 0, len 10
> [ 0.983628] [drm:drm_parse_display_id] found DisplayID tag 0x7, unhandled</span >
The 0x07 block contains VESA timings, not expecting any special modes there.
FYI, the panel marks the "3840x2160@60" mode as preferred, we wouldn't get
native resolution out-of-the-box if the flag is honored.</pre>
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