From patchwork Mon Mar 11 14:49:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "mripard@kernel.org" X-Patchwork-Id: 13588843 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 203D7C54E58 for ; Mon, 11 Mar 2024 14:50:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5B1DA112AC4; Mon, 11 Mar 2024 14:50:45 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="jlJ4n5BJ"; dkim-atps=neutral Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2B8FE112AAF for ; Mon, 11 Mar 2024 14:50:42 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 804A660DD7; Mon, 11 Mar 2024 14:50:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AAA7CC43390; Mon, 11 Mar 2024 14:50:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710168641; bh=Ki2+kLnqSWfFwJnoudwShZ/oB+/zItTMcLPTcxLszd8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=jlJ4n5BJnnNaXoKUtJbIqU1JXYLUWktkkBIdzbKhM67wTYObwhk6XEriLaSjknSoK Dlj6D9SUAdjR8Xry3FB05Ok/gbLmIg8i51StVOO3t9P326SxJF81nAs1OrHL99t8x5 LnFAh2sqd75dUhy1LQJqW5DSKgAZvsXtP0RnW2Cbt32fD/g064SpNDtC255THKNpBg G44qK2zP8wUYKdjKcfryd5nqFAHXhvIGPMMMjEDTyXSW4rUMQhnBWCUvwqioVLugyI 3PiD7GZoIbkKhImUzkbfeYbq9sWFHFylJjUrnSaKULtTo30SMgPhZ1n2xv23m5++4s SX+EYI1ql6mJw== From: Maxime Ripard Date: Mon, 11 Mar 2024 15:49:42 +0100 Subject: [PATCH v9 14/27] drm/connector: hdmi: Compute bpc and format automatically MIME-Version: 1.0 Message-Id: <20240311-kms-hdmi-connector-state-v9-14-d45890323344@kernel.org> References: <20240311-kms-hdmi-connector-state-v9-0-d45890323344@kernel.org> In-Reply-To: <20240311-kms-hdmi-connector-state-v9-0-d45890323344@kernel.org> To: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Daniel Vetter , Jonathan Corbet , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland Cc: Hans Verkuil , Sebastian Wick , =?utf-8?b?VmlsbGUgU3lyasOkbMOk?= , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-sunxi@lists.linux.dev, Maxime Ripard X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=11119; i=mripard@kernel.org; h=from:subject:message-id; bh=Ki2+kLnqSWfFwJnoudwShZ/oB+/zItTMcLPTcxLszd8=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDKnvpXgZOKQerZx79OQ3zv0b1vSENa71+bJh/bSKrNtp5 r0zJCbc6ihlYRDjYpAVU2SJETZfEndq1utONr55MHNYmcCGcHEKwESMihgZJh54eHmblmSQ4hQL h47q+fptloebWKRsUmXr8vcmOje2MzLcnyV0zVvUyPp/plvE3sncz4MfqfDPutHHnZQbveEK21t uAA== X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Now that we have all the infrastructure needed, we can add some code that will, for a given connector state and mode, compute the best output format and bpc. The algorithm is equivalent to the one already found in i915 and vc4. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/drm_atomic_state_helper.c | 184 ++++++++++++++++++++- .../gpu/drm/tests/drm_atomic_state_helper_test.c | 25 ++- 2 files changed, 197 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c index 448b4a73d1c8..9f517599f117 100644 --- a/drivers/gpu/drm/drm_atomic_state_helper.c +++ b/drivers/gpu/drm/drm_atomic_state_helper.c @@ -29,10 +29,11 @@ #include #include #include #include #include +#include #include #include #include #include #include @@ -660,10 +661,100 @@ connector_state_get_mode(const struct drm_connector_state *conn_state) return NULL; return &crtc_state->mode; } +static bool +sink_supports_format_bpc(const struct drm_connector *connector, + const struct drm_display_info *info, + const struct drm_display_mode *mode, + unsigned int format, unsigned int bpc) +{ + struct drm_device *dev = connector->dev; + u8 vic = drm_match_cea_mode(mode); + + if (vic == 1 && bpc != 8) { + drm_dbg(dev, "VIC1 requires a bpc of 8, got %u\n", bpc); + return false; + } + + if (!info->is_hdmi && + (format != HDMI_COLORSPACE_RGB || bpc != 8)) { + drm_dbg(dev, "DVI Monitors require an RGB output at 8 bpc\n"); + return false; + } + + if (!(connector->hdmi.supported_formats & BIT(format))) { + drm_dbg(dev, "%s format unsupported by the connector.\n", + drm_hdmi_connector_get_output_format_name(format)); + return false; + } + + switch (format) { + case HDMI_COLORSPACE_RGB: + drm_dbg(dev, "RGB Format, checking the constraints.\n"); + + if (!(info->color_formats & DRM_COLOR_FORMAT_RGB444)) + return false; + + if (bpc == 10 && !(info->edid_hdmi_rgb444_dc_modes & DRM_EDID_HDMI_DC_30)) { + drm_dbg(dev, "10 BPC but sink doesn't support Deep Color 30.\n"); + return false; + } + + if (bpc == 12 && !(info->edid_hdmi_rgb444_dc_modes & DRM_EDID_HDMI_DC_36)) { + drm_dbg(dev, "12 BPC but sink doesn't support Deep Color 36.\n"); + return false; + } + + drm_dbg(dev, "RGB format supported in that configuration.\n"); + + return true; + + case HDMI_COLORSPACE_YUV422: + drm_dbg(dev, "YUV422 format, checking the constraints.\n"); + + if (!(info->color_formats & DRM_COLOR_FORMAT_YCBCR422)) { + drm_dbg(dev, "Sink doesn't support YUV422.\n"); + return false; + } + + if (bpc != 12) { + drm_dbg(dev, "YUV422 only supports 12 bpc.\n"); + return false; + } + + drm_dbg(dev, "YUV422 format supported in that configuration.\n"); + + return true; + + case HDMI_COLORSPACE_YUV444: + drm_dbg(dev, "YUV444 format, checking the constraints.\n"); + + if (!(info->color_formats & DRM_COLOR_FORMAT_YCBCR444)) { + drm_dbg(dev, "Sink doesn't support YUV444.\n"); + return false; + } + + if (bpc == 10 && !(info->edid_hdmi_ycbcr444_dc_modes & DRM_EDID_HDMI_DC_30)) { + drm_dbg(dev, "10 BPC but sink doesn't support Deep Color 30.\n"); + return false; + } + + if (bpc == 12 && !(info->edid_hdmi_ycbcr444_dc_modes & DRM_EDID_HDMI_DC_36)) { + drm_dbg(dev, "12 BPC but sink doesn't support Deep Color 36.\n"); + return false; + } + + drm_dbg(dev, "YUV444 format supported in that configuration.\n"); + + return true; + } + + return false; +} + static enum drm_mode_status hdmi_clock_valid(const struct drm_connector *connector, const struct drm_display_mode *mode, unsigned long long clock) { @@ -704,10 +795,99 @@ hdmi_compute_clock(const struct drm_connector *connector, state->hdmi.tmds_char_rate = clock; return 0; } +static bool +hdmi_try_format_bpc(const struct drm_connector *connector, + struct drm_connector_state *state, + const struct drm_display_mode *mode, + unsigned int bpc, enum hdmi_colorspace fmt) +{ + const struct drm_display_info *info = &connector->display_info; + struct drm_device *dev = connector->dev; + int ret; + + drm_dbg(dev, "Trying %s output format\n", + drm_hdmi_connector_get_output_format_name(fmt)); + + if (!sink_supports_format_bpc(connector, info, mode, fmt, bpc)) { + drm_dbg(dev, "%s output format not supported with %u bpc\n", + drm_hdmi_connector_get_output_format_name(fmt), bpc); + return false; + } + + ret = hdmi_compute_clock(connector, state, mode, bpc, fmt); + if (ret) { + drm_dbg(dev, "Couldn't compute clock for %s output format and %u bpc\n", + drm_hdmi_connector_get_output_format_name(fmt), bpc); + return false; + } + + drm_dbg(dev, "%s output format supported with %u (TMDS char rate: %llu Hz)\n", + drm_hdmi_connector_get_output_format_name(fmt), bpc, state->hdmi.tmds_char_rate); + + return true; +} + +static int +hdmi_compute_format(const struct drm_connector *connector, + struct drm_connector_state *state, + const struct drm_display_mode *mode, + unsigned int bpc) +{ + struct drm_device *dev = connector->dev; + + if (hdmi_try_format_bpc(connector, state, mode, bpc, HDMI_COLORSPACE_RGB)) { + state->hdmi.output_format = HDMI_COLORSPACE_RGB; + return 0; + } + + if (hdmi_try_format_bpc(connector, state, mode, bpc, HDMI_COLORSPACE_YUV422)) { + state->hdmi.output_format = HDMI_COLORSPACE_YUV422; + return 0; + } + + drm_dbg(dev, "Failed. No Format Supported for that bpc count.\n"); + + return -EINVAL; +} + +static int +hdmi_compute_config(const struct drm_connector *connector, + struct drm_connector_state *state, + const struct drm_display_mode *mode) +{ + struct drm_device *dev = connector->dev; + unsigned int max_bpc = clamp_t(unsigned int, + state->max_bpc, + 8, connector->max_bpc); + unsigned int bpc; + int ret; + + for (bpc = max_bpc; bpc >= 8; bpc -= 2) { + drm_dbg(dev, "Trying with a %d bpc output\n", bpc); + + ret = hdmi_compute_format(connector, state, mode, bpc); + if (ret) + continue; + + state->hdmi.output_bpc = bpc; + + drm_dbg(dev, + "Mode %ux%u @ %uHz: Found configuration: bpc: %u, fmt: %s, clock: %llu\n", + mode->hdisplay, mode->vdisplay, drm_mode_vrefresh(mode), + state->hdmi.output_bpc, + drm_hdmi_connector_get_output_format_name(state->hdmi.output_format), + state->hdmi.tmds_char_rate); + + return 0; + } + + return -EINVAL; +} + /** * drm_atomic_helper_connector_hdmi_check() - Helper to check HDMI connector atomic state * @connector: DRM Connector * @state: the DRM State object * @@ -727,13 +907,11 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector, drm_atomic_get_new_connector_state(state, connector); const struct drm_display_mode *mode = connector_state_get_mode(new_state); int ret; - ret = hdmi_compute_clock(connector, new_state, mode, - new_state->hdmi.output_bpc, - new_state->hdmi.output_format); + ret = hdmi_compute_config(connector, new_state, mode); if (ret) return ret; if (old_state->hdmi.output_bpc != new_state->hdmi.output_bpc || old_state->hdmi.output_format != new_state->hdmi.output_format) { diff --git a/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c b/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c index 5a8750153510..f010fde0eb69 100644 --- a/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c +++ b/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c @@ -68,13 +68,10 @@ static int light_up_connector(struct kunit *test, KUNIT_ASSERT_NOT_ERR_OR_NULL(test, state); conn_state = drm_atomic_get_connector_state(state, connector); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state); - conn_state->hdmi.output_bpc = connector->max_bpc; - conn_state->hdmi.output_format = HDMI_COLORSPACE_RGB; - ret = drm_atomic_set_crtc_for_connector(conn_state, crtc); KUNIT_EXPECT_EQ(test, ret, 0); crtc_state = drm_atomic_get_crtc_state(state, crtc); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state); @@ -249,14 +246,19 @@ static void drm_test_check_output_bpc_crtc_mode_changed(struct kunit *test) priv = drm_atomic_helper_connector_hdmi_init(test, BIT(HDMI_COLORSPACE_RGB), 10); KUNIT_ASSERT_NOT_NULL(test, priv); + conn = &priv->connector; + ret = set_connector_edid(test, conn, + test_edid_hdmi_1080p_rgb_yuv_dc_max_200mhz, + ARRAY_SIZE(test_edid_hdmi_1080p_rgb_yuv_dc_max_200mhz)); + KUNIT_ASSERT_EQ(test, ret, 0); + ctx = drm_kunit_helper_acquire_ctx_alloc(test); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); - conn = &priv->connector; preferred = find_preferred_mode(conn); KUNIT_ASSERT_NOT_NULL(test, preferred); drm = &priv->drm; crtc = priv->crtc; @@ -270,15 +272,15 @@ static void drm_test_check_output_bpc_crtc_mode_changed(struct kunit *test) KUNIT_ASSERT_NOT_ERR_OR_NULL(test, new_conn_state); old_conn_state = drm_atomic_get_old_connector_state(state, conn); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, old_conn_state); - new_conn_state->hdmi.output_bpc = 8; + new_conn_state->max_requested_bpc = 8; KUNIT_ASSERT_NE(test, - old_conn_state->hdmi.output_bpc, - new_conn_state->hdmi.output_bpc); + old_conn_state->max_requested_bpc, + new_conn_state->max_requested_bpc); ret = drm_atomic_check_only(state); KUNIT_ASSERT_EQ(test, ret, 0); old_conn_state = drm_atomic_get_old_connector_state(state, conn); @@ -318,14 +320,19 @@ static void drm_test_check_output_bpc_crtc_mode_not_changed(struct kunit *test) priv = drm_atomic_helper_connector_hdmi_init(test, BIT(HDMI_COLORSPACE_RGB), 10); KUNIT_ASSERT_NOT_NULL(test, priv); + conn = &priv->connector; + ret = set_connector_edid(test, conn, + test_edid_hdmi_1080p_rgb_yuv_dc_max_200mhz, + ARRAY_SIZE(test_edid_hdmi_1080p_rgb_yuv_dc_max_200mhz)); + KUNIT_ASSERT_EQ(test, ret, 0); + ctx = drm_kunit_helper_acquire_ctx_alloc(test); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx); - conn = &priv->connector; preferred = find_preferred_mode(conn); KUNIT_ASSERT_NOT_NULL(test, preferred); drm = &priv->drm; crtc = priv->crtc; @@ -668,11 +675,11 @@ static void drm_test_check_format_value(struct kunit *test) 8); KUNIT_ASSERT_NOT_NULL(test, priv); conn = &priv->connector; conn_state = conn->state; - KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, HDMI_COLORSPACE_RGB); + KUNIT_EXPECT_EQ(test, conn_state->hdmi.output_format, 0); } /* * Test that the value of the output format property out of reset is set * to 0, and will be computed at atomic_check time.