Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755386AbeAILAh (ORCPT + 1 other); Tue, 9 Jan 2018 06:00:37 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:50934 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754978AbeAIK5D (ORCPT ); Tue, 9 Jan 2018 05:57:03 -0500 From: Maxime Ripard To: Chen-Yu Tsai , Maxime Ripard , Daniel Vetter , Jani Nikula , Sean Paul Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Thomas Petazzoni , thomas@vitsch.nl, Boris Brezillon , Eric Anholt , Inki Dae , Joonyoung Shim , Kyungmin Park , Laurent Pinchart , Mark Yao , Seung-Woo Kim Subject: [PATCH 01/19] drm/fourcc: Add a function to tell if the format embeds alpha Date: Tue, 9 Jan 2018 11:56:20 +0100 Message-Id: X-Mailer: git-send-email 2.14.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: There's a bunch of drivers that duplicate the same function to know if a particular format embeds an alpha component or not. Let's create a helper to avoid duplicating that logic. Cc: Boris Brezillon Cc: Eric Anholt Cc: Inki Dae Cc: Joonyoung Shim Cc: Kyungmin Park Cc: Laurent Pinchart Cc: Mark Yao Cc: Seung-Woo Kim Signed-off-by: Maxime Ripard --- drivers/gpu/drm/drm_fourcc.c | 43 +++++++++++++++++++++++++++++++++++++- include/drm/drm_fourcc.h | 1 +- 2 files changed, 44 insertions(+) diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index 9c0152df45ad..6e6227d6a46b 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -348,3 +348,46 @@ int drm_format_plane_height(int height, uint32_t format, int plane) return height / info->vsub; } EXPORT_SYMBOL(drm_format_plane_height); + +/** + * drm_format_has_alpha - get whether the format embeds an alpha component + * @format: pixel format (DRM_FORMAT_*) + * + * Returns: + * true if the format embeds an alpha component, false otherwise. + */ +bool drm_format_has_alpha(uint32_t format) +{ + switch (format) { + case DRM_FORMAT_ARGB4444: + case DRM_FORMAT_ABGR4444: + case DRM_FORMAT_RGBA4444: + case DRM_FORMAT_BGRA4444: + case DRM_FORMAT_ARGB1555: + case DRM_FORMAT_ABGR1555: + case DRM_FORMAT_RGBA5551: + case DRM_FORMAT_BGRA5551: + case DRM_FORMAT_ARGB8888: + case DRM_FORMAT_ABGR8888: + case DRM_FORMAT_RGBA8888: + case DRM_FORMAT_BGRA8888: + case DRM_FORMAT_ARGB2101010: + case DRM_FORMAT_ABGR2101010: + case DRM_FORMAT_RGBA1010102: + case DRM_FORMAT_BGRA1010102: + case DRM_FORMAT_AYUV: + case DRM_FORMAT_XRGB8888_A8: + case DRM_FORMAT_XBGR8888_A8: + case DRM_FORMAT_RGBX8888_A8: + case DRM_FORMAT_BGRX8888_A8: + case DRM_FORMAT_RGB888_A8: + case DRM_FORMAT_BGR888_A8: + case DRM_FORMAT_RGB565_A8: + case DRM_FORMAT_BGR565_A8: + return true; + + default: + return false; + } +} +EXPORT_SYMBOL(drm_format_has_alpha); diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index 6942e84b6edd..e08fc22c5f78 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -69,5 +69,6 @@ int drm_format_vert_chroma_subsampling(uint32_t format); int drm_format_plane_width(int width, uint32_t format, int plane); int drm_format_plane_height(int height, uint32_t format, int plane); const char *drm_get_format_name(uint32_t format, struct drm_format_name_buf *buf); +bool drm_format_has_alpha(uint32_t format); #endif /* __DRM_FOURCC_H__ */ -- git-series 0.9.1