From patchwork Mon Mar 7 20:52:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 12772366 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 42522C433F5 for ; Mon, 7 Mar 2022 20:53:47 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id CE1B410E261; Mon, 7 Mar 2022 20:53:41 +0000 (UTC) Received: from albert.telenet-ops.be (albert.telenet-ops.be [IPv6:2a02:1800:110:4::f00:1a]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3214410E250 for ; Mon, 7 Mar 2022 20:53:36 +0000 (UTC) Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed40:6100:2d37:4115:c358]) by albert.telenet-ops.be with bizsmtp id 3YtW2700F1Yj8bA06YtWdo; Mon, 07 Mar 2022 21:53:34 +0100 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 1nRKLY-0036Qd-Sw; Mon, 07 Mar 2022 21:52:48 +0100 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1nRKLX-0034hG-ST; Mon, 07 Mar 2022 21:52:47 +0100 From: Geert Uytterhoeven To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Javier Martinez Canillas , Sam Ravnborg , Helge Deller Subject: [PATCH v2 01/10] drm/fourcc: Add drm_format_info_bpp() helper Date: Mon, 7 Mar 2022 21:52:36 +0100 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Geert Uytterhoeven , linux-m68k@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add a helper to retrieve the actual number of bits per pixel for a plane, taking into account the number of characters and pixels per block for tiled formats. Signed-off-by: Geert Uytterhoeven Reviewed-by: Javier Martinez Canillas --- v2: - Move up. --- drivers/gpu/drm/drm_fourcc.c | 19 +++++++++++++++++++ include/drm/drm_fourcc.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index 07741b678798b0f1..cf48ea0b2cb70ba8 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -370,6 +370,25 @@ unsigned int drm_format_info_block_height(const struct drm_format_info *info, } EXPORT_SYMBOL(drm_format_info_block_height); +/** + * drm_format_info_bpp - number of bits per pixel + * @info: pixel format info + * @plane: plane index + * + * Returns: + * The actual number of bits per pixel, depending on the plane index. + */ +unsigned int drm_format_info_bpp(const struct drm_format_info *info, int plane) +{ + if (!info || plane < 0 || plane >= info->num_planes) + return 0; + + return info->char_per_block[plane] * 8 / + (drm_format_info_block_width(info, plane) * + drm_format_info_block_height(info, plane)); +} +EXPORT_SYMBOL(drm_format_info_bpp); + /** * drm_format_info_min_pitch - computes the minimum required pitch in bytes * @info: pixel format info diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index 22aa64d07c7905e2..3800a7ad7f0cda7a 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -313,6 +313,7 @@ unsigned int drm_format_info_block_width(const struct drm_format_info *info, int plane); unsigned int drm_format_info_block_height(const struct drm_format_info *info, int plane); +unsigned int drm_format_info_bpp(const struct drm_format_info *info, int plane); uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, int plane, unsigned int buffer_width);