From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shawn Guo Subject: Re: [PATCH] ARM: dts: imx7d: fix LCDIF clock assignment Date: Mon, 5 Dec 2016 10:01:24 +0800 Message-ID: <20161205020123.GA2066@dragon> References: <20161123004204.10851-1-stefan@agner.ch> <7e4829f484f6c4425fc9d01bea1a094f@agner.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <7e4829f484f6c4425fc9d01bea1a094f-XLVq0VzYD2Y@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Arnd Bergmann , Olof Johansson Cc: Sascha Hauer , Stefan Agner , Mark Rutland , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel , robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, Peter Chen , Fabio Estevam , Liu Ying , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Fabio Estevam List-Id: devicetree@vger.kernel.org Hi Arnd, Olof, On Sun, Dec 04, 2016 at 05:26:58PM -0800, Stefan Agner wrote: > Hi Shawn > > On 2016-11-23 15:02, Fabio Estevam wrote: > > On Tue, Nov 22, 2016 at 10:42 PM, Stefan Agner wrote: > >> The eLCDIF IP of the i.MX 7 SoC knows multiple clocks and lists them > >> separately: > >> > >> Clock Clock Root Description > >> apb_clk MAIN_AXI_CLK_ROOT AXI clock > >> pix_clk LCDIF_PIXEL_CLK_ROOT Pixel clock > >> ipg_clk_s MAIN_AXI_CLK_ROOT Peripheral access clock > >> > >> All of them are switched by a single gate, which is part of the > >> IMX7D_LCDIF_PIXEL_ROOT_CLK clock. Hence using that clock also for > >> the AXI bus clock (clock-name "axi") makes sure the gate gets > >> enabled when accessing registers. > >> > >> There seem to be no separate AXI display clock, and the clock is > >> optional. Hence remove the dummy clock. > >> > >> This fixes kernel freezes when starting the X-Server (which > >> disables/re-enables the display controller). > >> > >> Signed-off-by: Stefan Agner > > > > Reviewed-by: Fabio Estevam > > Since this fixes a kernel freeze, is there a chance to get this still in > 4.9? Since we get one more week to the final 4.9, is it possible for you to send this fix for 4.9 inclusion? Thanks. For the patch, Acked-by: Shawn Guo Shawn -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html