From patchwork Thu Feb 22 18:14:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 775421 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CEECA13BACA; Thu, 22 Feb 2024 18:15:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708625710; cv=none; b=gJ4Z/i1Xs/rcvRos6GcK2XjhmgMSOTuvC9yGfr5FPSn5PKF1dz31a8I2SHZQ9KYMfAo0+fGhzv2rhcJKmPxKlbqndhVpjcTRTxfiwuytBofYjUmHj+hMKKUjjxZGmbqeoDoBVafyTD4BWXczxxg7bVRqkzg9crcfarcKFki2tnY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708625710; c=relaxed/simple; bh=aMsc7DdFYwurA9KgzS5h4e6qDwulzTropP6PF1/SZF4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=dtogYjzDIRsx/kCZ4LpyKlfoZ9rkvOv0cvTpCLB+/n+O4kHx6C8yEa5XEAdqsCiQIFJs5cCwv9mZJm0gmA6ZcsagTNqb45ahyL3XCSAOfh361c5Dow5/FkAqv7mAlcsJZ5rk4clQWTAv6mJIZOGf7uhRp8JxnowzwXZzYGk6CZ4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=J6fngq1A; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="J6fngq1A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 524A2C433F1; Thu, 22 Feb 2024 18:15:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708625710; bh=aMsc7DdFYwurA9KgzS5h4e6qDwulzTropP6PF1/SZF4=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=J6fngq1AbjSrcpH0KSddtC11tu8hWtlXwsgy7la4yxHKjSEW7SBGDGYfUbc8ZdzsD VixyiJ/+DLrcPPfZwU4wVHjJf4RbsigYHXtzBxqOCKrL28zEROL4UqbjtIney0EJ5V 4IUYvBgQbvX3MOtdTR/bR7JYxzyDS3E7sjF1LadvaGAyNlvds1COBBpDU+phe/Ge6v ueT5iDm0sldCDjsKXTB6LAYEDj4ic7nazR2voKDG3JnpX5Bd9asFIDLTRUjwQkQxjv yh8PQuySNfICttg/30j4mNSfUhroSvlZlYZC2HwwJsBS70SMMcTgJ7xi2kR/T57Bqp onJX00DCAB0ug== From: Maxime Ripard Date: Thu, 22 Feb 2024 19:14:01 +0100 Subject: [PATCH v7 15/36] drm/connector: hdmi: Calculate TMDS character rate Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240222-kms-hdmi-connector-state-v7-15-8f4af575fce2@kernel.org> References: <20240222-kms-hdmi-connector-state-v7-0-8f4af575fce2@kernel.org> In-Reply-To: <20240222-kms-hdmi-connector-state-v7-0-8f4af575fce2@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 , Dave Stevenson X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=5168; i=mripard@kernel.org; h=from:subject:message-id; bh=aMsc7DdFYwurA9KgzS5h4e6qDwulzTropP6PF1/SZF4=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDKnX+z4d1eW3m3RkpZiDT0QHL9tbX+dmzt96LOaXzyze1 5PoyRXaUcrCIMbFICumyBIjbL4k7tSs151sfPNg5rAygQxh4OIUgIk8WsfIcOCEWPSajxeZdj33 n3TC4+hOh7TDS253PVlw3llnmfGthOMMf6XZyv3m9vFtNflnlJK3/+FyhzVFLQLz5YUSU4z1BBU 5+QA= X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D Most HDMI drivers have some code to calculate the TMDS character rate, usually to adjust an internal clock to match what the mode requires. Since the TMDS character rates mostly depends on the resolution, whether we need to repeat pixels or not, the bpc count and the format, we can now derive it from the HDMI connector state that stores all those infos and remove the duplication from drivers. Reviewed-by: Dave Stevenson Signed-off-by: Maxime Ripard --- drivers/gpu/drm/drm_atomic.c | 1 + drivers/gpu/drm/drm_atomic_state_helper.c | 66 ++++++++++++++++++++++ .../gpu/drm/tests/drm_atomic_state_helper_test.c | 3 + include/drm/drm_connector.h | 5 ++ 4 files changed, 75 insertions(+) diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 8730137baa86..26f9e525c0a0 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1148,6 +1148,7 @@ static void drm_atomic_connector_print_state(struct drm_printer *p, drm_printf(p, "\toutput_bpc=%u\n", state->hdmi.output_bpc); drm_printf(p, "\toutput_format=%s\n", drm_hdmi_connector_get_output_format_name(state->hdmi.output_format)); + drm_printf(p, "\ttmds_char_rate=%llu\n", state->hdmi.tmds_char_rate); } if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c index ae99765c45de..63a96c691460 100644 --- a/drivers/gpu/drm/drm_atomic_state_helper.c +++ b/drivers/gpu/drm/drm_atomic_state_helper.c @@ -640,6 +640,63 @@ int drm_atomic_helper_connector_tv_check(struct drm_connector *connector, } EXPORT_SYMBOL(drm_atomic_helper_connector_tv_check); +static const struct drm_display_mode * +connector_state_get_mode(const struct drm_connector_state *conn_state) +{ + struct drm_atomic_state *state; + struct drm_crtc_state *crtc_state; + struct drm_crtc *crtc; + + state = conn_state->state; + if (!state) + return NULL; + + crtc = conn_state->crtc; + if (!crtc) + return NULL; + + crtc_state = drm_atomic_get_new_crtc_state(state, crtc); + if (!crtc_state) + return NULL; + + return &crtc_state->mode; +} + +static enum drm_mode_status +hdmi_clock_valid(const struct drm_connector *connector, + const struct drm_display_mode *mode, + unsigned long long clock) +{ + const struct drm_display_info *info = &connector->display_info; + + if (info->max_tmds_clock && clock > info->max_tmds_clock * 1000) + return MODE_CLOCK_HIGH; + + return MODE_OK; +} + +static int +hdmi_compute_clock(const struct drm_connector *connector, + struct drm_connector_state *state, + const struct drm_display_mode *mode, + unsigned int bpc, enum hdmi_colorspace fmt) +{ + enum drm_mode_status status; + unsigned long long clock; + + clock = drm_connector_hdmi_compute_mode_clock(mode, bpc, fmt); + if (!clock) + return -EINVAL; + + status = hdmi_clock_valid(connector, mode, clock); + if (status != MODE_OK) + return -EINVAL; + + state->hdmi.tmds_char_rate = clock; + + return 0; +} + /** * drm_atomic_helper_connector_hdmi_check() - Helper to check HDMI connector atomic state * @connector: DRM Connector @@ -659,6 +716,15 @@ int drm_atomic_helper_connector_hdmi_check(struct drm_connector *connector, drm_atomic_get_old_connector_state(state, connector); struct drm_connector_state *new_state = 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); + 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 1c3dd8a98fb0..f2acbd4c216c 100644 --- a/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c +++ b/drivers/gpu/drm/tests/drm_atomic_state_helper_test.c @@ -70,6 +70,9 @@ static int light_up_connector(struct kunit *test, 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); diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index a859ad7ee04b..e3917ea93986 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1050,6 +1050,11 @@ struct drm_connector_state { * @output_format: Pixel format to output in. */ enum hdmi_colorspace output_format; + + /** + * @tmds_char_rate: TMDS Character Rate, in Hz. + */ + unsigned long long tmds_char_rate; } hdmi; };