From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cao Minh Hiep Date: Thu, 14 May 2015 03:18:21 +0000 Subject: Re: [Bug Report] DU: Error messages at boot log and can't show image on RGB Display. Message-Id: <555413FD.6050308@jinso.co.jp> List-Id: References: <5552F298.2020201@jinso.co.jp> In-Reply-To: <5552F298.2020201@jinso.co.jp> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: linux-sh@vger.kernel.org Hi Laurent-san, I'd like to report some more informations On 2015年05月14日 06:56, Laurent Pinchart wrote: > Hello, > > On Wednesday 13 May 2015 15:43:36 Cao Minh Hiep wrote: >> Hi All. >> >> We are testing Linux upstream version-4.1-rc2 on Lager. >> We found a Error message of DU(Display Unit) at boot logs: >> The Warning messages is showed as below: >> "rcar-du feb00000.display: encoder initialization failed, skipping" >> Then we tried to show a .bmp image on RGB Display via RGB port. But it >> didn't work. >> >> Testing method: >> 1. Connect RGB Display to RGB port on Lager. >> 2. Show a BMP image on Display by this command: >> # bmap /dev/fb0 ./image.bmp >> >> We'd like to report this problem first. >> There are no error message at version v4.0 stable. >> And showed the image on RGB Display normally at version v4.0 stable. >> We are looking for the error patch that added between v4.0 and v4.1-rc2. > I've tried v4.1-rc2 and haven't experienced that problem. It might be related > to kernel configuration, could you please share your .config file ? > We found that, if revert these patches then rebuild kernel, the error logs "encoder initialization failed..." will be disappeared: 26c00ab ARM: shmobile: lager: Add DU external pixel clocks to DT fd25cdd ARM: shmobile: lager: Add DU HDMI output support These patch added between v4.0 and v4.1-rc2. But with this test, a bmp image still could not show on RGB Display. Thank you. Jinso/Hiep.