From patchwork Fri Jul 8 18:21:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 12911619 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32467CCA482 for ; Fri, 8 Jul 2022 18:21:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239362AbiGHSVz (ORCPT ); Fri, 8 Jul 2022 14:21:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239210AbiGHSVf (ORCPT ); Fri, 8 Jul 2022 14:21:35 -0400 Received: from baptiste.telenet-ops.be (baptiste.telenet-ops.be [IPv6:2a02:1800:120:4::f00:13]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C33C82391 for ; Fri, 8 Jul 2022 11:21:32 -0700 (PDT) Received: from ramsan.of.borg ([84.195.186.194]) by baptiste.telenet-ops.be with bizsmtp id siMU270024C55Sk01iMUmx; Fri, 08 Jul 2022 20:21:30 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1o9sbX-002fJg-CX; Fri, 08 Jul 2022 20:21:27 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1o9sbW-00BtNW-MT; Fri, 08 Jul 2022 20:21:26 +0200 From: Geert Uytterhoeven To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , =?utf-8?q?Noralf_Tr=C3=B8nnes?= , Gerd Hoffmann Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 1/3] drm/fourcc: Add missing big-endian XRGB1555 and RGB565 formats Date: Fri, 8 Jul 2022 20:21:07 +0200 Message-Id: <0744671ac096a12f0d538906bd324efa71b11400.1657300532.git.geert@linux-m68k.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org As of commit eae06120f1974e1a ("drm: refuse ADDFB2 ioctl for broken bigendian drivers"), drivers must set the quirk_addfb_prefer_host_byte_order quirk to make the drm_mode_addfb() compat code work correctly on big-endian machines. While that works fine for big-endian XRGB8888 and ARGB8888, which are mapped to the existing little-endian BGRX8888 and BGRA8888 formats, it does not work for big-endian XRGB1555 and RGB565, as the latter are not listed in the format database. Fix this by adding the missing formats. Limit this to big-endian platforms, as there is currently no need to support these formats on little-endian platforms. Fixes: 6960e6da9cec3f66 ("drm: fix drm_mode_addfb() on big endian machines.") Signed-off-by: Geert Uytterhoeven --- Cirrus is the only driver setting quirk_addfb_prefer_host_byte_order and supporting RGB565 or XRGB1555, but no one tried that on big-endian? Cirrus does not support DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN in cirrus_fb_create, so you cannot get a graphical text console. Do we need these definitions on little-endian platforms, too? Would it be better to use "DRM_FORMAT_{XRGB1555,RGB565} | DRM_FORMAT_BIG_ENDIAN" instead of "DRM_FORMAT_HOST_{XRGB1555,RGB565}" in formats[]? Alternative, callers could filter out the DRM_FORMAT_BIG_ENDIAN flag when calling {,__}drm_format_info(). Advantages: - No need to have separate entries with DRM_FORMAT_BIG_ENDIAN set. Disadvantages: - {,__}drm_format_info() returns a pointer to a const object, whose .format field won't have the DRM_FORMAT_BIG_ENDIAN flag set, complicating callers, - All callers need to be updated, - It is difficult to know which big-endian formats are really supported, especially as only a few are needed. --- drivers/gpu/drm/drm_fourcc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index e09331bb3bc73f21..16a854c9e07fa4b0 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -190,6 +190,10 @@ const struct drm_format_info *__drm_format_info(u32 format) { .format = DRM_FORMAT_BGRA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, { .format = DRM_FORMAT_RGB565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, { .format = DRM_FORMAT_BGR565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, +#ifdef __BIG_ENDIAN + { .format = DRM_FORMAT_HOST_XRGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, + { .format = DRM_FORMAT_HOST_RGB565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, +#endif { .format = DRM_FORMAT_RGB888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 }, { .format = DRM_FORMAT_BGR888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 }, { .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 },