From patchwork Fri Jun 13 09:00:29 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 896870 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8853A2853E3 for ; Fri, 13 Jun 2025 09:05:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.135.223.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749805519; cv=none; b=YPoGZUjg1crJJvD49bZCEVNx4V62yntq6yeXke2YWtpvnFKfsDhv1ZhV2//X7RWOztZQEN7dzxBB5RcnxKv14Jfozi/jvL6D346Q69Deve8nWhN0S4o/uSmdJMHpLu1ljz+yc2PTUogapPmGlGZGWl5RkG3BUNni5wEsGM392RI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749805519; c=relaxed/simple; bh=x45ukw67OJuRzl6QgbEuYIut/uVOQEz2BADU3nbw8Oo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XY0oF3sHr/riwQvy1fgiOfkGxhgtLyKQ/6O72Od6GycKwhcQA/8lWtGJfaxoannkXDGpeDHq25YJ1bFatZnLFDTXV0Ip+O+iz2uaqTBxBLD4dB16kCC13lwekCYlmXZbn8xnRzl3PKvuHCpw1t1Nwd6fjpsfUDzy5XH/T3jsPuY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de; spf=pass smtp.mailfrom=suse.de; arc=none smtp.client-ip=195.135.223.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.de Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id D93101F891; Fri, 13 Jun 2025 09:04:42 +0000 (UTC) Authentication-Results: smtp-out2.suse.de; none Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 11BCF137FE; Fri, 13 Jun 2025 09:04:42 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id mOb7AqrpS2inNAAAD6G6ig (envelope-from ); Fri, 13 Jun 2025 09:04:42 +0000 From: Thomas Zimmermann To: simona@ffwll.ch, airlied@gmail.com, mripard@kernel.org, maarten.lankhorst@linux.intel.com, geert@linux-m68k.org, tomi.valkeinen@ideasonboard.com Cc: dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, imx@lists.linux.dev, linux-samsung-soc@vger.kernel.org, nouveau@lists.freedesktop.org, virtualization@lists.linux.dev, spice-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-tegra@vger.kernel.org, intel-xe@lists.freedesktop.org, xen-devel@lists.xenproject.org, Thomas Zimmermann , Philipp Zabel , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Subject: [PATCH v5 10/25] drm/imx/ipuv3: Compute dumb-buffer sizes with drm_mode_size_dumb() Date: Fri, 13 Jun 2025 11:00:29 +0200 Message-ID: <20250613090431.127087-11-tzimmermann@suse.de> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250613090431.127087-1-tzimmermann@suse.de> References: <20250613090431.127087-1-tzimmermann@suse.de> Precedence: bulk X-Mailing-List: linux-samsung-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spam-Level: X-Spamd-Result: default: False [-4.00 / 50.00]; REPLY(-4.00)[] X-Spam-Flag: NO X-Rspamd-Queue-Id: D93101F891 X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Rspamd-Action: no action X-Spam-Score: -4.00 Call drm_mode_size_dumb() to compute dumb-buffer scanline pitch and buffer size. The hardware requires the framebuffer width to be a multiple of 8. The scanline pitch has to be large enough to support this. Therefore compute the byte size of 8 pixels in the given color mode and align the pitch accordingly. v5: - fix typo in commit description Signed-off-by: Thomas Zimmermann Reviewed-by: Philipp Zabel Cc: Philipp Zabel Cc: Shawn Guo Cc: Sascha Hauer Cc: Pengutronix Kernel Team Cc: Fabio Estevam --- drivers/gpu/drm/imx/ipuv3/imx-drm-core.c | 31 ++++++++++++++++++------ 1 file changed, 23 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/imx/ipuv3/imx-drm-core.c b/drivers/gpu/drm/imx/ipuv3/imx-drm-core.c index af4a30311e18..465b5a6ad5bb 100644 --- a/drivers/gpu/drm/imx/ipuv3/imx-drm-core.c +++ b/drivers/gpu/drm/imx/ipuv3/imx-drm-core.c @@ -17,7 +17,9 @@ #include #include #include +#include #include +#include #include #include #include @@ -141,19 +143,32 @@ static int imx_drm_dumb_create(struct drm_file *file_priv, struct drm_device *drm, struct drm_mode_create_dumb *args) { - u32 width = args->width; + u32 fourcc; + const struct drm_format_info *info; + u64 pitch_align; int ret; - args->width = ALIGN(width, 8); - args->pitch = DIV_ROUND_UP(args->width * args->bpp, 8); - args->size = args->pitch * args->height; - - ret = drm_gem_dma_dumb_create_internal(file_priv, drm, args); + /* + * Hardware requires the framebuffer width to be aligned to + * multiples of 8. The mode-setting code handles this, but + * the buffer pitch has to be aligned as well. Set the pitch + * alignment accordingly, so that the each scanline fits into + * the allocated buffer. + */ + fourcc = drm_driver_color_mode_format(drm, args->bpp); + if (fourcc == DRM_FORMAT_INVALID) + return -EINVAL; + info = drm_format_info(fourcc); + if (!info) + return -EINVAL; + pitch_align = drm_format_info_min_pitch(info, 0, SZ_8); + if (!pitch_align || pitch_align > U32_MAX) + return -EINVAL; + ret = drm_mode_size_dumb(drm, args, pitch_align, 0); if (ret) return ret; - args->width = width; - return ret; + return drm_gem_dma_dumb_create(file_priv, drm, args); } static const struct drm_driver imx_drm_driver = {