Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932383Ab3FFI2K (ORCPT ); Thu, 6 Jun 2013 04:28:10 -0400 Received: from hqemgate03.nvidia.com ([216.228.121.140]:4130 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932220Ab3FFI2G (ORCPT ); Thu, 6 Jun 2013 04:28:06 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Thu, 06 Jun 2013 01:27:44 -0700 Message-ID: <51B047FD.4020400@nvidia.com> Date: Thu, 6 Jun 2013 17:27:41 +0900 From: Alex Courbot Organization: NVIDIA User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 MIME-Version: 1.0 To: Jean-Christophe PLAGNIOL-VILLARD CC: Tomi Valkeinen , Stephen Warren , Olof Johansson , "gnurou@gmail.org" , "linux-kernel@vger.kernel.org" , "linux-fbdev@vger.kernel.org" Subject: Re: [PATCH] simplefb: add support for a8b8g8r8 pixel format References: <1370503259-16618-1-git-send-email-acourbot@nvidia.com> <3356BC4D-EEF6-4FCA-9310-5B0727EBF288@jcrosoft.com> <51B0446A.4090305@nvidia.com> <29610936-BB03-4844-888B-56E1C8E5DF4A@jcrosoft.com> In-Reply-To: <29610936-BB03-4844-888B-56E1C8E5DF4A@jcrosoft.com> Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2968 Lines: 67 On 06/06/2013 05:24 PM, Jean-Christophe PLAGNIOL-VILLARD wrote: > > On Jun 6, 2013, at 10:12 AM, Alex Courbot wrote: > >> On 06/06/2013 04:59 PM, Jean-Christophe PLAGNIOL-VILLARD wrote: >>> >>> On Jun 6, 2013, at 9:20 AM, Alexandre Courbot wrote: >>> >>>> Signed-off-by: Alexandre Courbot >>>> --- >>>> Documentation/devicetree/bindings/video/simple-framebuffer.txt | 1 + >>>> drivers/video/simplefb.c | 1 + >>>> 2 files changed, 2 insertions(+) >>>> >>>> diff --git a/Documentation/devicetree/bindings/video/simple-framebuffer.txt b/Documentation/devicetree/bindings/video/simple-framebuffer.txt >>>> index 3ea4605..70c26f3 100644 >>>> --- a/Documentation/devicetree/bindings/video/simple-framebuffer.txt >>>> +++ b/Documentation/devicetree/bindings/video/simple-framebuffer.txt >>>> @@ -12,6 +12,7 @@ Required properties: >>>> - stride: The number of bytes in each line of the framebuffer. >>>> - format: The format of the framebuffer surface. Valid values are: >>>> - r5g6b5 (16-bit pixels, d[15:11]=r, d[10:5]=g, d[4:0]=b). >>>> + - a8b8g8r8 (32-bit pixels, d[31:24]=a, d[23:16]=b, d[15:8]=g, d[7:0]=r). >>>> >>>> Example: >>>> >>>> diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb.c >>>> index e2e9e3e..d7041aa 100644 >>>> --- a/drivers/video/simplefb.c >>>> +++ b/drivers/video/simplefb.c >>>> @@ -84,6 +84,7 @@ struct simplefb_format { >>>> >>>> static struct simplefb_format simplefb_formats[] = { >>>> { "r5g6b5", 16, {11, 5}, {5, 6}, {0, 5}, {0, 0} }, >>>> + { "a8b8g8r8", 32, {0, 8}, {8, 8}, {16, 8}, {31, 8} }, >>> >>> why don't you parse the string? >>> >>> so you will a real generic bindings >> >> Tried that already, got NACKed: https://lkml.org/lkml/2013/5/27/330 >> >> The list of modes of this driver should not grow too big. Even in terms of footprint I'd say the list should remain smaller than the parsing code. >> >> What we can discuss though is whether we want to keep this a8b8g8r8 syntax or switch to something more standard, say "rgba8888". > > I'm going to be very honest I do not like the simplefb driver from the beginning > but I do found it useful. And as said in it's name it need to be *SIMPLE* > > Then a huge list of compatible no way > otherwise we drop this from the simplefb and make it a generic helper > > I do not want to see format parser in every drivers this need to handle at video framework level > > If I see that we start to increase again and again the simplefb I will not accept > to merge the code as we must keep it simple In that case it's probably better to maintain a "simple" list of supported modes, which is what this patch does. Alex. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/