From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russell King - ARM Linux Subject: Re: [RFC 0/1] drm/pl111: Initial drm/kms driver for pl111 Date: Fri, 26 Jul 2013 15:14:30 +0100 Message-ID: <20130726141430.GQ24642@n2100.arm.linux.org.uk> References: <1374772648-19151-1-git-send-email-tom.cooksey@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Rob Clark Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, pawel.moll@arm.com, linux-arm-kernel@lists.infradead.org, tom.cooksey@arm.com List-Id: dri-devel@lists.freedesktop.org On Thu, Jul 25, 2013 at 02:21:59PM -0400, Rob Clark wrote: > On Thu, Jul 25, 2013 at 1:17 PM, wrote: > > Known issues: > > * It uses KDS. We intend to switch to whatever implicit per-buffer > > synchronisation mechanism gets merged, once something is merged. > > * It abuses flags parameter of DRM_IOCTL_MODE_CREATE_DUMB to also > > allocate buffers for the GPU. Still not sure how to resolve this > > as we don't use DRM for our GPU driver. > > any thoughts/plans about a DRM GPU driver? Ideally long term (esp. > once the dma-fence stuff is in place), we'd have gpu-specific drm > (gpu-only, no kms) driver, and SoC/display specific drm/kms driver, > using prime/dmabuf to share between the two. The PL111 primecell is just a scanout device. It has no GPU embedded in it. It's just like the Armada/Dove DRM stuff - if a GPU is provided it's an entirely separate piece of IP, and will likely remain a separate non-DRM driver. In the case of PL111, PL111 is not manufacturer specific so the GPU can be any standalone GPU.