On Fri, Nov 25, 2016 at 11:22:13AM +0100, Jean-Francois Moine wrote: > On Fri, 25 Nov 2016 17:41:51 +0800 > Icenowy Zheng <icenowy@xxxxxxxx> wrote: > > > After removing CLK_PLL_DE's assigned-clock, the kernel passes compilation. > > The 'pll-de' and 'de' must have a fixed rate. Otherwise, if you do not > use the legacy u-boot, I don't know which can be the rate of the DE. > > > However, it cannot recognize any HDMI screen... > > > > (My board is Orange Pi One, and I manually added status="okay"; to &lcd0, &de, &hdmi) > > > > [ 16.507802] sun8i-de2 1000000.de-controller: bound 1c0c000.lcd-controller (ops de2_lcd_ops [sun8i_de2_drm]) > > [ 16.675948] sun8i-de2 1000000.de-controller: bound 1ee0000.hdmi (ops de2_hdmi_fini [sun8i_de2_hdmi]) > > [ 16.685120] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). > > [ 16.695876] [drm] No driver support for vblank timestamp query. > > [ 16.701862] sun8i-de2 1000000.de-controller: No connectors reported connected with modes > > [ 16.713061] [drm] Cannot find any crtc or sizes - going 1024x768 > > [ 16.734214] Console: switching to colour frame buffer device 128x48 > > [ 16.751022] sun8i-de2 1000000.de-controller: fb0: frame buffer device > > I put a 'pr_warn' message is case the EDID cannot be read. > Have you this message? > > Anyway, there is a problem with the EDID: > - my Orange Pi 2 (H3) randomly fails to read it. But this succeeds after > rebooting once or twice. > - my Banana Pi M2+ (H3) reads it correctly each time. > - my Banana Pi M3 (A83T) can never read it. > > BTW, on first tries, I was forcing a CEA mode thru the kernel command > line. This was working with the OPi2 and BPiM3, but there was no sound. > In the last version, I use a EDID in edid_firmware for having sound > with the BPiM3. This works fine. > But, forcing a CEA mode is no more possible, so, when the OPi2 cannot > read the EDID, the system switches to a VGA mode (default 1024x768) > which is not supported. It seems that this is your case. > > So, in brief, if your board cannot read the EDID, put a EDID somewhere > and its path in /sys/module/drm_kms_helper/parameters/edid_firmware. > There will be no console, but X11 will work correctly. This is one of the things that are usually very helpful to put in a cover letter. This is obviously also a blocker for the merge of the driver, and should be dealt with. Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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