From patchwork Tue Sep 25 06:19:43 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: archit taneja X-Patchwork-Id: 1502141 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 45C343FC71 for ; Tue, 25 Sep 2012 06:20:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753198Ab2IYGUX (ORCPT ); Tue, 25 Sep 2012 02:20:23 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:48592 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753172Ab2IYGUV (ORCPT ); Tue, 25 Sep 2012 02:20:21 -0400 Received: from dlelxv30.itg.ti.com ([172.17.2.17]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id q8P6KKo4021529; Tue, 25 Sep 2012 01:20:20 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv30.itg.ti.com (8.13.8/8.13.8) with ESMTP id q8P6KKZl005766; Tue, 25 Sep 2012 01:20:20 -0500 Received: from dlelxv23.itg.ti.com (172.17.1.198) by dfle73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.1.323.3; Tue, 25 Sep 2012 01:20:20 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dlelxv23.itg.ti.com (8.13.8/8.13.8) with ESMTP id q8P6KKp5025077; Tue, 25 Sep 2012 01:20:20 -0500 Received: from localhost (a0393947pc.apr.dhcp.ti.com [172.24.137.248]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id q8P6KIw08911; Tue, 25 Sep 2012 01:20:18 -0500 (CDT) From: Archit Taneja To: CC: , , Archit Taneja Subject: [PATCH v2 08/18] OMAPDSS: DISPC: Allow both upscaling and downscaling of chroma Date: Tue, 25 Sep 2012 11:49:43 +0530 Message-ID: <1348553993-8083-9-git-send-email-archit@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1348553993-8083-1-git-send-email-archit@ti.com> References: <1347538505-25359-1-git-send-email-archit@ti.com> <1348553993-8083-1-git-send-email-archit@ti.com> MIME-Version: 1.0 Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org In the function dispc_plane_set_scaling_uv(), create a parameter which tells if we want to upscale or downscale the chroma plane. Downscaling of chroma is required by writeback pipeline for converting the input YUV444 color format to YUV422 or NV12. Signed-off-by: Archit Taneja --- drivers/video/omap2/dss/dispc.c | 32 ++++++++++++++++++++++---------- 1 file changed, 22 insertions(+), 10 deletions(-) diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c index ba65ebd..e42e902 100644 --- a/drivers/video/omap2/dss/dispc.c +++ b/drivers/video/omap2/dss/dispc.c @@ -1457,6 +1457,7 @@ static void dispc_ovl_set_scaling_uv(enum omap_plane plane, { int scale_x = out_width != orig_width; int scale_y = out_height != orig_height; + bool chroma_upscale = true; if (!dss_has_feature(FEAT_HANDLE_UV_SEPARATE)) return; @@ -1473,23 +1474,34 @@ static void dispc_ovl_set_scaling_uv(enum omap_plane plane, switch (color_mode) { case OMAP_DSS_COLOR_NV12: - /* UV is subsampled by 2 vertically*/ - orig_height >>= 1; - /* UV is subsampled by 2 horz.*/ - orig_width >>= 1; + if (chroma_upscale) { + /* UV is subsampled by 2 horizontally and vertically */ + orig_height >>= 1; + orig_width >>= 1; + } else { + /* UV is downsampled by 2 horizontally and vertically */ + orig_height <<= 1; + orig_width <<= 1; + } + break; case OMAP_DSS_COLOR_YUV2: case OMAP_DSS_COLOR_UYVY: - /*For YUV422 with 90/270 rotation, - *we don't upsample chroma - */ + /* For YUV422 with 90/270 rotation, we don't upsample chroma */ if (rotation == OMAP_DSS_ROT_0 || - rotation == OMAP_DSS_ROT_180) - /* UV is subsampled by 2 hrz*/ - orig_width >>= 1; + rotation == OMAP_DSS_ROT_180) { + if (chroma_upscale) + /* UV is subsampled by 2 horizontally */ + orig_width >>= 1; + else + /* UV is downsampled by 2 horizontally */ + orig_width <<= 1; + } + /* must use FIR for YUV422 if rotated */ if (rotation != OMAP_DSS_ROT_0) scale_x = scale_y = true; + break; default: BUG();