From mboxrd@z Thu Jan 1 00:00:00 1970 From: heiko@sntech.de (Heiko Stuebner) Date: Mon, 08 Feb 2016 11:52:21 +0100 Subject: [PATCH v7 0/5] Add mipi dsi support for rk3288 In-Reply-To: <56B869F4.6090507@codeaurora.org> References: <1452053038-32098-1-git-send-email-zyw@rock-chips.com> <56B869F4.6090507@codeaurora.org> Message-ID: <5060470.dfeHX20DRa@phil> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Archit, Am Montag, 8. Februar 2016, 15:42:04 schrieb Archit Taneja: > On 01/06/2016 09:33 AM, Chris Zhong wrote: > > The rk3288 MIPI DSI is a Synopsys DesignWare MIPI DSI host controller > > IP. This series adds support for a Synopsys DesignWare MIPI DSI host > > controller DRM driver. > > > > The MIPI DSI feature is tested on rk3288 evb board, backport them to > > chrome os kernel chrome_v3.14, and it can display normally. > > > > This patchset is base on the patchset from Ying.liu at freescale.com. > > > > > > According to the suggestion from Thierry, I have get rid of the bridge, > > and register the encoder & connecter in drm/rockchip/dw-mipi-dsi.c. > > I've raised this question too late, but what was the reason to not > implement the DSI block as a bridge driver? There seems to always be some sort of contention about those being bridge drivers - I think I remember Thierry speaking up about that. But I don't remember if any different solution was suggested. Also as we have seen with current shared IPs (dw-hdmi + analogix-dp) there are always implementation-specific parts and deciding which needs to land where is difficult without the secondary user present. The first iterations where using a bridge-driver-base for it but I guess it was to much hassle without seeing another user on the horizon. > The drm/hisilicon IP seems to use a very similar DSI Designware IP (the > register offsets seems to be the same). There is a good potential of > re-use here by different kms drivers here the way it's already done for > DW HDMI and the analogix DP driver that's in review process. I guess, the second user now gets to do the generalization ;-) Heiko