From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D9319207A38 for ; Mon, 5 Jan 2026 13:27:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767619669; cv=none; b=LRIkfDg1ZdDHw1mX62tLyWkYXJtZIX6VinZeS8ELZlT/7yHM1lHsj/QH3GjQap0CN5BKgZpl+gSE9ptEfF+ob9ER6OazC2/TEZPpA6sQFK5aaok96Dx7j8IQCmzRypqX6f9DBQUS+9re5Sum+r9i8L5n7P2/JUWpvMPtkqEKJ80= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767619669; c=relaxed/simple; bh=Nq1GgZrOf/emQcdrOsGb9hClHyJSrsTO84jtRf+YMdg=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=giqJluWx8ZgtjN8DvESt48iIvlDZnl6XV0en+KHPyjAMOKW00KqI2NzHu0f0Zy0BxOIN8LsOtJqh43YGTrBN0m+/8CnofToFsF7LCI4UFxKJ/886hiblUT0Ttgfk0k7Lb3QhDTxECHm0D0kTsmjqf6LEZD5khy1mUgVXnFodLW8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0+3RrYji; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="0+3RrYji" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 040E0C116D0; Mon, 5 Jan 2026 13:27:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767619669; bh=Nq1GgZrOf/emQcdrOsGb9hClHyJSrsTO84jtRf+YMdg=; h=Subject:To:Cc:From:Date:From; b=0+3RrYjiOi0Jwe/3Rq1YYhgZ2p+thmBTm+xJSrp6ResDMBWKm2Avx7Xd5VpbcDMUj TUA782Hs0nFYy1VlYcjmNFSh04aDEtQWGiow+/kSqpQ2tPsK7iQdw0lMvi+zH1UxTO WbY5oe+E+SkR1xXqoeoJPikg9FhUokddmfRnZhcY= Subject: FAILED: patch "[PATCH] drm/mgag200: Fix big-endian support" failed to apply to 5.15-stable tree To: rene@exactco.de,tzimmermann@suse.de Cc: From: Date: Mon, 05 Jan 2026 14:27:46 +0100 Message-ID: <2026010546-doorpost-resume-e2e2@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 6cb31fba137d45e682ce455b8ea364f44d5d4f98 # git commit -s git send-email --to '' --in-reply-to '2026010546-doorpost-resume-e2e2@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 6cb31fba137d45e682ce455b8ea364f44d5d4f98 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ren=C3=A9=20Rebe?= Date: Mon, 8 Dec 2025 14:18:27 +0100 Subject: [PATCH] drm/mgag200: Fix big-endian support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Unlike the original, deleted Matrox mga driver, the new mgag200 driver has the XRGB frame-buffer byte swapped on big-endian "RISC" systems. Fix by enabling byte swapping "PowerPC" OPMODE for any __BIG_ENDIAN config. Fixes: 414c45310625 ("mgag200: initial g200se driver (v2)") Signed-off-by: René Rebe Cc: stable@kernel.org Reviewed-by: Thomas Zimmermann Signed-off-by: Thomas Zimmermann Link: https://patch.msgid.link/20251208.141827.965103015954471168.rene@exactco.de diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c index 951d715dea30..d019177462cf 100644 --- a/drivers/gpu/drm/mgag200/mgag200_mode.c +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c @@ -161,6 +161,30 @@ static void mgag200_set_startadd(struct mga_device *mdev, WREG_ECRT(0x00, crtcext0); } +/* + * Set the opmode for the hardware swapper for Big-Endian processor + * support for the frame buffer aperture and DMAWIN space. + */ +static void mgag200_set_datasiz(struct mga_device *mdev, u32 format) +{ +#if defined(__BIG_ENDIAN) + u32 opmode = RREG32(MGAREG_OPMODE); + + opmode &= ~(GENMASK(17, 16) | GENMASK(9, 8) | GENMASK(3, 2)); + + /* Big-endian byte-swapping */ + switch (format) { + case DRM_FORMAT_RGB565: + opmode |= 0x10100; + break; + case DRM_FORMAT_XRGB8888: + opmode |= 0x20200; + break; + } + WREG32(MGAREG_OPMODE, opmode); +#endif +} + void mgag200_init_registers(struct mga_device *mdev) { u8 crtc11, misc; @@ -496,6 +520,7 @@ void mgag200_primary_plane_helper_atomic_update(struct drm_plane *plane, struct drm_atomic_helper_damage_iter iter; struct drm_rect damage; + mgag200_set_datasiz(mdev, fb->format->format); drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state); drm_atomic_for_each_plane_damage(&iter, &damage) { mgag200_handle_damage(mdev, shadow_plane_state->data, fb, &damage);