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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702564808; x=1703169608; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=CVbbR720mxFQWZWSF5/+frzTWN+zosuo0CwTK2ojkMc=; b=Yq8LZZdmbnuewcLR28+QlGXZq6F+Rhnu4ZOWB6NFJNMzlOnojtRlY0n1GiKGONVpS8 QeE63uawCtdUkQD2YKWM/juCfR9E/LUMwcuWbSb0VRjsXZtcyENVXryf2tdIzqH9E5xZ YU1nt0TBP5WKU/RARevPS8tjJclZjIlx+sVb4JpOCAIIULSrQtBF7MA0pEQWZQRJ2rdH yh+iPX00QBApWXSO3f8zoiz4KfqsgBbGFDrqsGG4WKG9V84ttidUmWBaOGomZlzuWR/x oIxfCOwJyNSg97ZjzAZSBK1ooz4S5r5Z9Hhoxp8/JabJoMl/Mp5t3rpEqEPjcrsIrEF+ VFUg== X-Gm-Message-State: AOJu0YxMG3Z2IMC6y5dTfgQwBGmq9IJBSLVCWGMDqXKtxgIILLOzQlZu lKdjUIUAqhdlKVRwlY/sZfZjJOThjVmIhNWIA9ZQ1w== X-Google-Smtp-Source: AGHT+IE2fGQgctDfqw+SdyQcQrVtSDwfkDhdhufA57h07Dfv7cH935CDl5idwK5f/LKOwnfwTJf5aUvfXaezh/MpzdQ= X-Received: by 2002:a05:6902:cc2:b0:da3:b466:1f73 with SMTP id cq2-20020a0569020cc200b00da3b4661f73mr7064045ybb.24.1702564807819; Thu, 14 Dec 2023 06:40:07 -0800 (PST) MIME-Version: 1.0 References: <20231207-kms-hdmi-connector-state-v5-0-6538e19d634d@kernel.org> <20231207-kms-hdmi-connector-state-v5-6-6538e19d634d@kernel.org> In-Reply-To: <20231207-kms-hdmi-connector-state-v5-6-6538e19d634d@kernel.org> From: Dave Stevenson Date: Thu, 14 Dec 2023 14:39:51 +0000 Message-ID: Subject: Re: [PATCH v5 06/44] drm/connector: Introduce an HDMI connector initialization function To: Maxime Ripard Cc: Maarten Lankhorst , Thomas Zimmermann , David Airlie , Daniel Vetter , Emma Anholt , Jonathan Corbet , Sandy Huang , =?UTF-8?Q?Heiko_St=C3=BCbner?= , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Hans Verkuil , linux-rockchip@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231214_064010_688128_AA39466B X-CRM114-Status: GOOD ( 35.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Maxime As requested, I'm just going through patches 6-16. I will say that I've been less thorough in checking the kunit test code in this series than the core code changes, and I'm trusting that all the unit tests pass. I get a build failure on the complete series for arm64 with the standard defconfig depmod: ERROR: Cycle detected: drm_display_helper -> drm_kms_helper -> drm_display_helper depmod: ERROR: Cycle detected: drm depmod: ERROR: Found 2 modules in dependency cycles! I haven't followed it through as to the reason, but obviously that will need to be addressed. Dave On Thu, 7 Dec 2023 at 15:49, Maxime Ripard wrote: > > A lot of the various HDMI drivers duplicate some logic that depends on > the HDMI spec itself and not really a particular hardware > implementation. > > Output BPC or format selection, infoframe generation are good examples > of such areas. > > This creates a lot of boilerplate, with a lot of variations, which makes > it hard for userspace to rely on, and makes it difficult to get it right > for drivers. > > In the next patches, we'll add a lot of infrastructure around the > drm_connector and drm_connector_state structures, which will allow to > abstract away the duplicated logic. This infrastructure comes with a few > requirements though, and thus we need a new initialization function. > > Hopefully, this will make drivers simpler to handle, and their behaviour > more consistent. > > Signed-off-by: Maxime Ripard Reviewed-by: Dave Stevenson > --- > drivers/gpu/drm/drm_connector.c | 39 +++++++++ > drivers/gpu/drm/tests/drm_connector_test.c | 123 +++++++++++++++++++++++++++++ > include/drm/drm_connector.h | 5 ++ > 3 files changed, 167 insertions(+) > > diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c > index b0516505f7ae..d9961cce8245 100644 > --- a/drivers/gpu/drm/drm_connector.c > +++ b/drivers/gpu/drm/drm_connector.c > @@ -452,6 +452,45 @@ int drmm_connector_init(struct drm_device *dev, > } > EXPORT_SYMBOL(drmm_connector_init); > > +/** > + * drmm_connector_hdmi_init - Init a preallocated HDMI connector > + * @dev: DRM device > + * @connector: A pointer to the HDMI connector to init > + * @funcs: callbacks for this connector > + * @connector_type: user visible type of the connector > + * @ddc: optional pointer to the associated ddc adapter > + * > + * Initialises a preallocated HDMI connector. Connectors can be > + * subclassed as part of driver connector objects. > + * > + * Cleanup is automatically handled with a call to > + * drm_connector_cleanup() in a DRM-managed action. > + * > + * The connector structure should be allocated with drmm_kzalloc(). > + * > + * Returns: > + * Zero on success, error code on failure. > + */ > +int drmm_connector_hdmi_init(struct drm_device *dev, > + struct drm_connector *connector, > + const struct drm_connector_funcs *funcs, > + int connector_type, > + struct i2c_adapter *ddc) > +{ > + int ret; > + > + if (!(connector_type == DRM_MODE_CONNECTOR_HDMIA || > + connector_type == DRM_MODE_CONNECTOR_HDMIB)) > + return -EINVAL; > + > + ret = drmm_connector_init(dev, connector, funcs, connector_type, ddc); > + if (ret) > + return ret; > + > + return 0; > +} > +EXPORT_SYMBOL(drmm_connector_hdmi_init); > + > /** > * drm_connector_attach_edid_property - attach edid property. > * @connector: the connector > diff --git a/drivers/gpu/drm/tests/drm_connector_test.c b/drivers/gpu/drm/tests/drm_connector_test.c > index a268847be8d1..8f070cacab3b 100644 > --- a/drivers/gpu/drm/tests/drm_connector_test.c > +++ b/drivers/gpu/drm/tests/drm_connector_test.c > @@ -172,6 +172,128 @@ static struct kunit_suite drmm_connector_init_test_suite = { > .test_cases = drmm_connector_init_tests, > }; > > +/* > + * Test that the registration of a bog standard connector works as > + * expected and doesn't report any error. > + */ > +static void drm_test_connector_hdmi_init_valid(struct kunit *test) > +{ > + struct drm_connector_init_priv *priv = test->priv; > + int ret; > + > + ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector, > + &dummy_funcs, > + DRM_MODE_CONNECTOR_HDMIA, > + &priv->ddc); > + KUNIT_EXPECT_EQ(test, ret, 0); > +} > + > +/* > + * Test that the registration of a connector without a DDC adapter > + * doesn't report any error. > + */ > +static void drm_test_connector_hdmi_init_null_ddc(struct kunit *test) > +{ > + struct drm_connector_init_priv *priv = test->priv; > + int ret; > + > + ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector, > + &dummy_funcs, > + DRM_MODE_CONNECTOR_HDMIA, > + NULL); > + KUNIT_EXPECT_EQ(test, ret, 0); > +} > + > +/* > + * Test that the registration of an HDMI connector with an HDMI > + * connector type succeeds. > + */ > +static void drm_test_connector_hdmi_init_type_valid(struct kunit *test) > +{ > + struct drm_connector_init_priv *priv = test->priv; > + unsigned int connector_type = *(unsigned int *)test->param_value; > + int ret; > + > + ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector, > + &dummy_funcs, > + connector_type, > + &priv->ddc); > + KUNIT_EXPECT_EQ(test, ret, 0); > +} > + > +static const unsigned int drm_connector_hdmi_init_type_valid_tests[] = { > + DRM_MODE_CONNECTOR_HDMIA, > + DRM_MODE_CONNECTOR_HDMIB, > +}; > + > +static void drm_connector_hdmi_init_type_desc(const unsigned int *type, char *desc) > +{ > + sprintf(desc, "%s", drm_get_connector_type_name(*type)); > +} > + > +KUNIT_ARRAY_PARAM(drm_connector_hdmi_init_type_valid, > + drm_connector_hdmi_init_type_valid_tests, > + drm_connector_hdmi_init_type_desc); > + > +/* > + * Test that the registration of an HDMI connector with an !HDMI > + * connector type fails. > + */ > +static void drm_test_connector_hdmi_init_type_invalid(struct kunit *test) > +{ > + struct drm_connector_init_priv *priv = test->priv; > + unsigned int connector_type = *(unsigned int *)test->param_value; > + int ret; > + > + ret = drmm_connector_hdmi_init(&priv->drm, &priv->connector, > + &dummy_funcs, > + connector_type, > + &priv->ddc); > + KUNIT_EXPECT_LT(test, ret, 0); > +} > + > +static const unsigned int drm_connector_hdmi_init_type_invalid_tests[] = { > + DRM_MODE_CONNECTOR_Unknown, > + DRM_MODE_CONNECTOR_VGA, > + DRM_MODE_CONNECTOR_DVII, > + DRM_MODE_CONNECTOR_DVID, > + DRM_MODE_CONNECTOR_DVIA, > + DRM_MODE_CONNECTOR_Composite, > + DRM_MODE_CONNECTOR_SVIDEO, > + DRM_MODE_CONNECTOR_LVDS, > + DRM_MODE_CONNECTOR_Component, > + DRM_MODE_CONNECTOR_9PinDIN, > + DRM_MODE_CONNECTOR_DisplayPort, > + DRM_MODE_CONNECTOR_TV, > + DRM_MODE_CONNECTOR_eDP, > + DRM_MODE_CONNECTOR_VIRTUAL, > + DRM_MODE_CONNECTOR_DSI, > + DRM_MODE_CONNECTOR_DPI, > + DRM_MODE_CONNECTOR_WRITEBACK, > + DRM_MODE_CONNECTOR_SPI, > + DRM_MODE_CONNECTOR_USB, > +}; > + > +KUNIT_ARRAY_PARAM(drm_connector_hdmi_init_type_invalid, > + drm_connector_hdmi_init_type_invalid_tests, > + drm_connector_hdmi_init_type_desc); > + > +static struct kunit_case drmm_connector_hdmi_init_tests[] = { > + KUNIT_CASE(drm_test_connector_hdmi_init_valid), > + KUNIT_CASE(drm_test_connector_hdmi_init_null_ddc), > + KUNIT_CASE_PARAM(drm_test_connector_hdmi_init_type_valid, > + drm_connector_hdmi_init_type_valid_gen_params), > + KUNIT_CASE_PARAM(drm_test_connector_hdmi_init_type_invalid, > + drm_connector_hdmi_init_type_invalid_gen_params), > + { } > +}; > + > +static struct kunit_suite drmm_connector_hdmi_init_test_suite = { > + .name = "drmm_connector_hdmi_init", > + .init = drm_test_connector_init, > + .test_cases = drmm_connector_hdmi_init_tests, > +}; > + > struct drm_get_tv_mode_from_name_test { > const char *name; > enum drm_connector_tv_mode expected_mode; > @@ -236,6 +358,7 @@ static struct kunit_suite drm_get_tv_mode_from_name_test_suite = { > }; > > kunit_test_suites( > + &drmm_connector_hdmi_init_test_suite, > &drmm_connector_init_test_suite, > &drm_get_tv_mode_from_name_test_suite > ); > diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h > index fe88d7fc6b8f..4491c4c2fb6e 100644 > --- a/include/drm/drm_connector.h > +++ b/include/drm/drm_connector.h > @@ -1904,6 +1904,11 @@ int drmm_connector_init(struct drm_device *dev, > const struct drm_connector_funcs *funcs, > int connector_type, > struct i2c_adapter *ddc); > +int drmm_connector_hdmi_init(struct drm_device *dev, > + struct drm_connector *connector, > + const struct drm_connector_funcs *funcs, > + int connector_type, > + struct i2c_adapter *ddc); > void drm_connector_attach_edid_property(struct drm_connector *connector); > int drm_connector_register(struct drm_connector *connector); > void drm_connector_unregister(struct drm_connector *connector); > > -- > 2.43.0 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel