From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 60FD7C433ED for ; Mon, 10 May 2021 14:00:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 33C47610A7 for ; Mon, 10 May 2021 14:00:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244408AbhEJN70 (ORCPT ); Mon, 10 May 2021 09:59:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243047AbhEJNyN (ORCPT ); Mon, 10 May 2021 09:54:13 -0400 Received: from srv6.fidu.org (srv6.fidu.org [IPv6:2a01:4f8:231:de0::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4CA74C0612F0 for ; Mon, 10 May 2021 06:33:59 -0700 (PDT) Received: from localhost (localhost.localdomain [127.0.0.1]) by srv6.fidu.org (Postfix) with ESMTP id 64B9CC800A8; Mon, 10 May 2021 15:33:56 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at srv6.fidu.org Received: from srv6.fidu.org ([127.0.0.1]) by localhost (srv6.fidu.org [127.0.0.1]) (amavisd-new, port 10026) with LMTP id XuaVf3MAzLCD; Mon, 10 May 2021 15:33:56 +0200 (CEST) Received: from wsembach-tuxedo.fritz.box (p200300E37F0dA80022824231f945140A.dip0.t-ipconnect.de [IPv6:2003:e3:7f0d:a800:2282:4231:f945:140a]) (Authenticated sender: wse@tuxedocomputers.com) by srv6.fidu.org (Postfix) with ESMTPA id 18CC3C800A5; Mon, 10 May 2021 15:33:56 +0200 (CEST) From: Werner Sembach To: ville.syrjala@linux.intel.com, airlied@linux.ie, daniel@ffwll.ch, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: Werner Sembach Subject: [PATCH v7 3/3] drm/i915/display: Use YCbCr420 as fallback when RGB fails Date: Mon, 10 May 2021 15:33:49 +0200 Message-Id: <20210510133349.14491-4-wse@tuxedocomputers.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210510133349.14491-1-wse@tuxedocomputers.com> References: <20210510133349.14491-1-wse@tuxedocomputers.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When encoder validation of a display mode fails, retry with less bandwidth heavy YCbCr420 color mode, if available. This enables some HDMI 1.4 setups to support 4k60Hz output, which previously failed silently. AMDGPU had nearly the exact same issue. This problem description is therefore copied from my commit message of the AMDGPU patch. On some setups, while the monitor and the gpu support display modes with pixel clocks of up to 600MHz, the link encoder might not. This prevents YCbCr444 and RGB encoding for 4k60Hz, but YCbCr420 encoding might still be possible. However, which color mode is used is decided before the link encoder capabilities are checked. This patch fixes the problem by retrying to find a display mode with YCbCr420 enforced and using it, if it is valid. Signed-off-by: Werner Sembach --- drivers/gpu/drm/i915/display/intel_hdmi.c | 25 ++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index c411f1862286..6e135662da3e 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -1898,6 +1898,7 @@ intel_hdmi_mode_valid(struct drm_connector *connector, int clock = mode->clock; int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; bool has_hdmi_sink = intel_has_hdmi_sink(hdmi, connector->state); + bool ycbcr_420_only; if (mode->flags & DRM_MODE_FLAG_DBLSCAN) return MODE_NO_DBLESCAN; @@ -1914,12 +1915,22 @@ intel_hdmi_mode_valid(struct drm_connector *connector, clock *= 2; } - if (drm_mode_is_420_only(&connector->display_info, mode)) + ycbcr_420_only = drm_mode_is_420_only(&connector->display_info, mode); + if (ycbcr_420_only) clock /= 2; status = intel_hdmi_mode_clock_valid(hdmi, clock, has_hdmi_sink); - if (status != MODE_OK) - return status; + if (status != MODE_OK) { + if (ycbcr_420_only || + !connector->ycbcr_420_allowed || + !drm_mode_is_420_also(&connector->display_info, mode)) + return status; + + clock /= 2; + status = intel_hdmi_mode_clock_valid(hdmi, clock, has_hdmi_sink); + if (status != MODE_OK) + return status; + } return intel_mode_valid_max_plane_size(dev_priv, mode, false); } @@ -2127,6 +2138,14 @@ static int intel_hdmi_compute_output_format(struct intel_encoder *encoder, } ret = intel_hdmi_compute_clock(encoder, crtc_state); + if (ret) { + if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_YCBCR420 && + connector->ycbcr_420_allowed && + drm_mode_is_420_also(&connector->display_info, adjusted_mode)) { + crtc_state->output_format = INTEL_OUTPUT_FORMAT_YCBCR420; + ret = intel_hdmi_compute_clock(encoder, crtc_state); + } + } return ret; } -- 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E2B4C433ED for ; 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Mon, 10 May 2021 15:33:56 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at srv6.fidu.org Received: from srv6.fidu.org ([127.0.0.1]) by localhost (srv6.fidu.org [127.0.0.1]) (amavisd-new, port 10026) with LMTP id XuaVf3MAzLCD; Mon, 10 May 2021 15:33:56 +0200 (CEST) Received: from wsembach-tuxedo.fritz.box (p200300E37F0dA80022824231f945140A.dip0.t-ipconnect.de [IPv6:2003:e3:7f0d:a800:2282:4231:f945:140a]) (Authenticated sender: wse@tuxedocomputers.com) by srv6.fidu.org (Postfix) with ESMTPA id 18CC3C800A5; Mon, 10 May 2021 15:33:56 +0200 (CEST) From: Werner Sembach To: ville.syrjala@linux.intel.com, airlied@linux.ie, daniel@ffwll.ch, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Date: Mon, 10 May 2021 15:33:49 +0200 Message-Id: <20210510133349.14491-4-wse@tuxedocomputers.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210510133349.14491-1-wse@tuxedocomputers.com> References: <20210510133349.14491-1-wse@tuxedocomputers.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v7 3/3] drm/i915/display: Use YCbCr420 as fallback when RGB fails X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Werner Sembach Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" When encoder validation of a display mode fails, retry with less bandwidth heavy YCbCr420 color mode, if available. This enables some HDMI 1.4 setups to support 4k60Hz output, which previously failed silently. AMDGPU had nearly the exact same issue. This problem description is therefore copied from my commit message of the AMDGPU patch. On some setups, while the monitor and the gpu support display modes with pixel clocks of up to 600MHz, the link encoder might not. This prevents YCbCr444 and RGB encoding for 4k60Hz, but YCbCr420 encoding might still be possible. However, which color mode is used is decided before the link encoder capabilities are checked. This patch fixes the problem by retrying to find a display mode with YCbCr420 enforced and using it, if it is valid. Signed-off-by: Werner Sembach --- drivers/gpu/drm/i915/display/intel_hdmi.c | 25 ++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index c411f1862286..6e135662da3e 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -1898,6 +1898,7 @@ intel_hdmi_mode_valid(struct drm_connector *connector, int clock = mode->clock; int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; bool has_hdmi_sink = intel_has_hdmi_sink(hdmi, connector->state); + bool ycbcr_420_only; if (mode->flags & DRM_MODE_FLAG_DBLSCAN) return MODE_NO_DBLESCAN; @@ -1914,12 +1915,22 @@ intel_hdmi_mode_valid(struct drm_connector *connector, clock *= 2; } - if (drm_mode_is_420_only(&connector->display_info, mode)) + ycbcr_420_only = drm_mode_is_420_only(&connector->display_info, mode); + if (ycbcr_420_only) clock /= 2; status = intel_hdmi_mode_clock_valid(hdmi, clock, has_hdmi_sink); - if (status != MODE_OK) - return status; + if (status != MODE_OK) { + if (ycbcr_420_only || + !connector->ycbcr_420_allowed || + !drm_mode_is_420_also(&connector->display_info, mode)) + return status; + + clock /= 2; + status = intel_hdmi_mode_clock_valid(hdmi, clock, has_hdmi_sink); + if (status != MODE_OK) + return status; + } return intel_mode_valid_max_plane_size(dev_priv, mode, false); } @@ -2127,6 +2138,14 @@ static int intel_hdmi_compute_output_format(struct intel_encoder *encoder, } ret = intel_hdmi_compute_clock(encoder, crtc_state); + if (ret) { + if (crtc_state->output_format != INTEL_OUTPUT_FORMAT_YCBCR420 && + connector->ycbcr_420_allowed && + drm_mode_is_420_also(&connector->display_info, adjusted_mode)) { + crtc_state->output_format = INTEL_OUTPUT_FORMAT_YCBCR420; + ret = intel_hdmi_compute_clock(encoder, crtc_state); + } + } return ret; } -- 2.25.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx