From patchwork Mon Jul 10 11:18:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sharma, Shashank" X-Patchwork-Id: 9832749 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D564760350 for ; Mon, 10 Jul 2017 11:17:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C75C8283C3 for ; Mon, 10 Jul 2017 11:17:34 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BC6D7283D8; Mon, 10 Jul 2017 11:17:34 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 301E7283C3 for ; Mon, 10 Jul 2017 11:17:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1697E6E1B2; Mon, 10 Jul 2017 11:16:16 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id F30F56E1B2; Mon, 10 Jul 2017 11:16:14 +0000 (UTC) Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Jul 2017 04:16:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.40,339,1496127600"; d="scan'208";a="106590244" Received: from shashanks-linuxbox.iind.intel.com ([10.223.161.29]) by orsmga004.jf.intel.com with ESMTP; 10 Jul 2017 04:16:13 -0700 From: Shashank Sharma To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Mon, 10 Jul 2017 16:48:41 +0530 Message-Id: <1499685528-6926-14-git-send-email-shashank.sharma@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1499685528-6926-1-git-send-email-shashank.sharma@intel.com> References: <1499685528-6926-1-git-send-email-shashank.sharma@intel.com> Subject: [Intel-gfx] [PATCH 13/20] drm/i915: prepare csc unit for YCBCR420 output X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP To support ycbcr output, we need a pipe CSC block to do RGB->YCBCR conversion. Current Intel platforms have only one pipe CSC unit, so we can either do color correction using it, or we can perform RGB->YCBCR conversion. This function adds a csc handler, which uses recommended bspec values to perform RGB->YCBCR conversion (target color space BT709) V2: Rebase V3: Rebase V4: Rebase V5: Addressed review comments from Ander - Remove extra line added in the patch - Add the spec details in the commit message - Combine two if(cond) while calling intel_crtc_compute_config V6: Handle YCBCR420 outputs only (Ville) Signed-off-by: Shashank Sharma --- drivers/gpu/drm/i915/intel_color.c | 47 +++++++++++++++++++++++++++++++++++- drivers/gpu/drm/i915/intel_display.c | 17 +++++++++++++ 2 files changed, 63 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c index 306c6b0..8a5d211 100644 --- a/drivers/gpu/drm/i915/intel_color.c +++ b/drivers/gpu/drm/i915/intel_color.c @@ -41,6 +41,19 @@ #define LEGACY_LUT_LENGTH (sizeof(struct drm_color_lut) * 256) +/* Post offset values for RGB->YCBCR conversion */ +#define POSTOFF_RGB_TO_YUV_HI 0x800 +#define POSTOFF_RGB_TO_YUV_ME 0x100 +#define POSTOFF_RGB_TO_YUV_LO 0x800 + +/* Direct spec values for RGB->YUV conversion matrix */ +#define CSC_RGB_TO_YUV_RU_GU 0x2ba809d8 +#define CSC_RGB_TO_YUV_BU 0x37e80000 +#define CSC_RGB_TO_YUV_RY_GY 0x1e089cc0 +#define CSC_RGB_TO_YUV_BY 0xb5280000 +#define CSC_RGB_TO_YUV_RV_GV 0xbce89ad8 +#define CSC_RGB_TO_YUV_BV 0x1e080000 + /* * Extract the CSC coefficient from a CTM coefficient (in U32.32 fixed point * format). This macro takes the coefficient we want transformed and the @@ -91,6 +104,35 @@ static void ctm_mult_by_limited(uint64_t *result, int64_t *input) } } +void i9xx_load_ycbcr_conversion_matrix(struct intel_crtc *intel_crtc) +{ + int pipe = intel_crtc->pipe; + struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev); + + /* We don't use high values for conversion */ + I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0); + I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0); + I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0); + + /* Program direct spec values for RGB to YCBCR conversion matrix */ + I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), CSC_RGB_TO_YUV_RU_GU); + I915_WRITE(PIPE_CSC_COEFF_BU(pipe), CSC_RGB_TO_YUV_BU); + + I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), CSC_RGB_TO_YUV_RY_GY); + I915_WRITE(PIPE_CSC_COEFF_BY(pipe), CSC_RGB_TO_YUV_BY); + + I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), CSC_RGB_TO_YUV_RV_GV); + I915_WRITE(PIPE_CSC_COEFF_BV(pipe), CSC_RGB_TO_YUV_BV); + + /* Spec postoffset values */ + I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), POSTOFF_RGB_TO_YUV_HI); + I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), POSTOFF_RGB_TO_YUV_ME); + I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), POSTOFF_RGB_TO_YUV_LO); + + /* CSC mode before gamma */ + I915_WRITE(PIPE_CSC_MODE(pipe), 0); +} + /* Set up the pipe CSC unit. */ static void i9xx_load_csc_matrix(struct drm_crtc_state *crtc_state) { @@ -101,7 +143,10 @@ static void i9xx_load_csc_matrix(struct drm_crtc_state *crtc_state) uint16_t coeffs[9] = { 0, }; struct intel_crtc_state *intel_crtc_state = to_intel_crtc_state(crtc_state); - if (crtc_state->ctm) { + if (intel_crtc_state->ycbcr420) { + i9xx_load_ycbcr_conversion_matrix(intel_crtc); + return; + } else if (crtc_state->ctm) { struct drm_color_ctm *ctm = (struct drm_color_ctm *)crtc_state->ctm->data; uint64_t input[9] = { 0, }; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index b4a6415..c5ff568 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6288,6 +6288,23 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc, return -EINVAL; } + /* YCBCR420 feasibility check */ + if (pipe_config->ycbcr420) { + struct drm_crtc_state *drm_state = &pipe_config->base; + + /* + * There is only one pipe CSC unit per pipe, and we need that + * for output conversion from RGB->YCBCR. So if CTM is already + * applied we can't support YCBCR420 output. + */ + if (drm_state->ctm) { + DRM_ERROR("YCBCR420 and CTM is not possible\n"); + return -EINVAL; + } + + DRM_DEBUG_KMS("YCBCR420 output is possible from CRTC\n"); + } + /* * Pipe horizontal size must be even in: * - DVO ganged mode