From patchwork Wed Feb 7 10:17:37 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sharma, Shashank" X-Patchwork-Id: 10204865 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 1D6A660247 for ; Wed, 7 Feb 2018 10:12:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 002EF28634 for ; Wed, 7 Feb 2018 10:12:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E721C28988; Wed, 7 Feb 2018 10:12:20 +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 58C8B28634 for ; Wed, 7 Feb 2018 10:12:20 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 95F396E560; Wed, 7 Feb 2018 10:12:19 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id F00E26E55E for ; Wed, 7 Feb 2018 10:12:18 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 07 Feb 2018 02:12:18 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,473,1511856000"; d="scan'208";a="32782137" Received: from shashanks-linuxbox.iind.intel.com ([10.223.161.29]) by orsmga002.jf.intel.com with ESMTP; 07 Feb 2018 02:12:17 -0800 From: Shashank Sharma To: intel-gfx@lists.freedesktop.org Date: Wed, 7 Feb 2018 15:47:37 +0530 Message-Id: <1517998657-17188-9-git-send-email-shashank.sharma@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1517998657-17188-1-git-send-email-shashank.sharma@intel.com> References: <1517998657-17188-1-git-send-email-shashank.sharma@intel.com> Subject: [Intel-gfx] [PATCH v5 8/8] drm/i915: Add YCBCR 4:2:0/4:4:4 support for LSPCON X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 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 LSPCON chips can generate YCBCR outputs, if asked nicely :). In order to generate YCBCR 4:2:0 outputs, a source must: - send YCBCR 4:4:4 signals to LSPCON - program color space as 4:2:0 in AVI infoframes Whereas for YCBCR 4:4:4 outputs, the source must: - send YCBCR 4:4:4 signals to LSPCON - program color space as 4:4:4 in AVI infoframes So for both 4:2:0 as well as 4:4:4 outputs, we are driving the pipe for YCBCR 4:4:4 output, but AVI infoframe's color space information indicates LSPCON FW to start scaling down from YCBCR 4:4:4 and generate YCBCR 4:2:0 output. As the scaling is done by LSPCON device, we need not to reserve a scaler for 4:2:0 outputs. V2: rebase V3: Addressed review comments from Ville - add enum crtc_output_format instead of bool ycbcr420 - use crtc_output_format=4:4:4 for modeset of LSPCON 4:2:0 output cases in this way we will have YCBCR 4:4:4 framework ready (except the ABI part) V4: Added r-b from Maarten (for v3) Addressed review comments from Ville: - Do not add a non-atomic state variable to determine lspcon output. Instead add bool in CRTC state to indicate lspcon based scaling. V5: Addressed review comments from Ville: - Change the state bool name from external scaling to something more relavent. - Keep the info and adjusted_mode structures const. - use crtc_state instead of pipe_config. - Push all the config change into lspcon_ycbcr420_config function. Cc: Ville Syrjala Cc: Maarten Lankhorst Reviewed-by: Maarten Lankhorst Signed-off-by: Shashank Sharma --- drivers/gpu/drm/i915/i915_reg.h | 2 ++ drivers/gpu/drm/i915/intel_ddi.c | 7 +++++++ drivers/gpu/drm/i915/intel_display.c | 9 +++++++++ drivers/gpu/drm/i915/intel_dp.c | 4 ++++ drivers/gpu/drm/i915/intel_drv.h | 5 +++++ drivers/gpu/drm/i915/intel_lspcon.c | 26 ++++++++++++++++++++++++++ 6 files changed, 53 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index e9c79b5..61ef124 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -8766,6 +8766,8 @@ enum skl_power_gate { #define TRANS_MSA_MISC(tran) _MMIO_TRANS2(tran, _TRANSA_MSA_MISC) #define TRANS_MSA_SYNC_CLK (1<<0) +#define TRANS_MSA_SAMPLING_444 (2<<1) +#define TRANS_MSA_CLRSP_YCBCR (2<<3) #define TRANS_MSA_6_BPC (0<<5) #define TRANS_MSA_8_BPC (1<<5) #define TRANS_MSA_10_BPC (2<<5) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index caa16e9..540d465 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1499,6 +1499,13 @@ void intel_ddi_set_pipe_settings(const struct intel_crtc_state *crtc_state) break; } + /* + * As per DP 1.2 spec section 2.3.4.3 while sending + * YCBCR 444 signals we should program MSA MISC1/0 fields with + * colorspace information. The output colorspace encoding is BT601. + */ + if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444) + temp |= TRANS_MSA_SAMPLING_444 | TRANS_MSA_CLRSP_YCBCR; I915_WRITE(TRANS_MSA_MISC(cpu_transcoder), temp); } diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 35dd26c..26418e1 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9243,6 +9243,7 @@ static bool haswell_get_pipe_config(struct intel_crtc *crtc, pipe_config->gamma_mode = I915_READ(GAMMA_MODE(crtc->pipe)) & GAMMA_MODE_MODE_MASK; + pipe_config->lspcon_downsampling = false; if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9) { u32 tmp = I915_READ(PIPEMISC(crtc->pipe)); enum intel_output_format output = INTEL_OUTPUT_FORMAT_RGB; @@ -9261,6 +9262,14 @@ static bool haswell_get_pipe_config(struct intel_crtc *crtc, else output = INTEL_OUTPUT_FORMAT_YCBCR420; } else { + /* + * As there is no interface defined (yet) + * to get the user's preference for output + * format, YCBCR444 output format is only + * possible with LSPCON YCBCR420 output, + * which uses LSPCON's (external )scaler. + */ + pipe_config->lspcon_downsampling = true; output = INTEL_OUTPUT_FORMAT_YCBCR444; } diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index d9e3a8a..469dc05 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1677,6 +1677,7 @@ intel_dp_compute_config(struct intel_encoder *encoder, struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); + struct intel_lspcon *lspcon = enc_to_intel_lspcon(&encoder->base); enum port port = encoder->port; struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc); struct intel_connector *intel_connector = intel_dp->attached_connector; @@ -1707,6 +1708,9 @@ intel_dp_compute_config(struct intel_encoder *encoder, pipe_config->has_pch_encoder = true; pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; + if (lspcon->active) + lspcon_ycbcr420_config(&intel_connector->base, pipe_config); + pipe_config->has_drrs = false; if (IS_G4X(dev_priv) || port == PORT_A) pipe_config->has_audio = false; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 062e3e4..40127ac 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -886,6 +886,9 @@ struct intel_crtc_state { /* Output format RGB/YCBCR etc */ enum intel_output_format output_format; + + /* Output down scaling is done in LSPCON device */ + bool lspcon_downsampling; }; struct intel_crtc { @@ -2143,6 +2146,8 @@ void lspcon_set_infoframes(struct drm_encoder *encoder, const struct drm_connector_state *conn_state); bool lspcon_infoframe_enabled(struct drm_encoder *encoder, const struct intel_crtc_state *pipe_config); +void lspcon_ycbcr420_config(struct drm_connector *connector, + struct intel_crtc_state *crtc_state); /* intel_pipe_crc.c */ int intel_pipe_crc_create(struct drm_minor *minor); diff --git a/drivers/gpu/drm/i915/intel_lspcon.c b/drivers/gpu/drm/i915/intel_lspcon.c index c7755ee..61f2840 100644 --- a/drivers/gpu/drm/i915/intel_lspcon.c +++ b/drivers/gpu/drm/i915/intel_lspcon.c @@ -180,6 +180,21 @@ static bool lspcon_wake_native_aux_ch(struct intel_lspcon *lspcon) return true; } +void lspcon_ycbcr420_config(struct drm_connector *connector, + struct intel_crtc_state *crtc_state) +{ + const struct drm_display_info *info = &connector->display_info; + const struct drm_display_mode *adjusted_mode = + &crtc_state->base.adjusted_mode; + + if (drm_mode_is_420_only(info, adjusted_mode) && + connector->ycbcr_420_allowed) { + crtc_state->port_clock /= 2; + crtc_state->output_format = INTEL_OUTPUT_FORMAT_YCBCR444; + crtc_state->lspcon_downsampling = true; + } +} + static bool lspcon_probe(struct intel_lspcon *lspcon) { int retry; @@ -458,6 +473,15 @@ void lspcon_set_infoframes(struct drm_encoder *encoder, return; } + if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444) { + if (crtc_state->lspcon_downsampling) + frame.avi.colorspace = HDMI_COLORSPACE_YUV420; + else + frame.avi.colorspace = HDMI_COLORSPACE_YUV444; + } else { + frame.avi.colorspace = HDMI_COLORSPACE_RGB; + } + drm_hdmi_avi_infoframe_quant_range(&frame.avi, mode, crtc_state->limited_color_range ? HDMI_QUANTIZATION_RANGE_LIMITED : @@ -511,6 +535,7 @@ bool lspcon_init(struct intel_digital_port *intel_dig_port) struct intel_lspcon *lspcon = &intel_dig_port->lspcon; struct drm_device *dev = intel_dig_port->base.base.dev; struct drm_i915_private *dev_priv = to_i915(dev); + struct drm_connector *connector = &dp->attached_connector->base; if (!HAS_LSPCON(dev_priv)) { DRM_ERROR("LSPCON is not supported on this platform\n"); @@ -535,6 +560,7 @@ bool lspcon_init(struct intel_digital_port *intel_dig_port) return false; } + connector->ycbcr_420_allowed = true; lspcon->active = true; DRM_DEBUG_KMS("Success: LSPCON init\n"); return true;