From patchwork Thu Sep 13 12:14:54 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: archit taneja X-Patchwork-Id: 1451751 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 10DF1DF24C for ; Thu, 13 Sep 2012 12:15:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757952Ab2IMMPf (ORCPT ); Thu, 13 Sep 2012 08:15:35 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:43600 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757951Ab2IMMPd (ORCPT ); Thu, 13 Sep 2012 08:15:33 -0400 Received: from dlelxv30.itg.ti.com ([172.17.2.17]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id q8DCFWP3006953; Thu, 13 Sep 2012 07:15:32 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv30.itg.ti.com (8.13.8/8.13.8) with ESMTP id q8DCFWkc030828; Thu, 13 Sep 2012 07:15:32 -0500 Received: from dlelxv23.itg.ti.com (172.17.1.198) by dfle72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.1.323.3; Thu, 13 Sep 2012 07:15:32 -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 q8DCFW0e018580; Thu, 13 Sep 2012 07:15:32 -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 q8DCFUw07778; Thu, 13 Sep 2012 07:15:31 -0500 (CDT) From: Archit Taneja To: CC: , , Archit Taneja Subject: [PATCH 10/21] OMAPDSS: DISPC: Allow both upscaling and downscaling of chroma Date: Thu, 13 Sep 2012 17:44:54 +0530 Message-ID: <1347538505-25359-11-git-send-email-archit@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1347538505-25359-1-git-send-email-archit@ti.com> References: <1347538505-25359-1-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 58cb06c..60a60fc 100644 --- a/drivers/video/omap2/dss/dispc.c +++ b/drivers/video/omap2/dss/dispc.c @@ -1462,6 +1462,7 @@ static void dispc_plane_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; @@ -1478,23 +1479,34 @@ static void dispc_plane_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();