From: Mans Rullgard <mans@mansr.com> To: Maxime Ripard <maxime.ripard@bootlin.com>, David Airlie <airlied@linux.ie>, Chen-Yu Tsai <wens@csie.org> Cc: dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/sun4i: hdmi: add support for ddc-i2c-bus property Date: Mon, 11 Mar 2019 13:47:13 +0000 [thread overview] Message-ID: <20190311134713.25876-1-mans@mansr.com> (raw) Sometimes it is desirabled to use a separate i2c controller for ddc access. This adds support for the ddc-i2c-bus property of the hdmi-connector node, using the specified controller if provided. Signed-off-by: Mans Rullgard <mans@mansr.com> --- drivers/gpu/drm/sun4i/sun4i_hdmi.h | 1 + drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 37 +++++++++++++++++++++++--- 2 files changed, 35 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h index b685ee11623d..b08c4453d47c 100644 --- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h @@ -269,6 +269,7 @@ struct sun4i_hdmi { struct clk *tmds_clk; struct i2c_adapter *i2c; + struct i2c_adapter *ddc_i2c; /* Regmap fields for I2C adapter */ struct regmap_field *field_ddc_en; diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c index 061d2e0d9011..5b2fac79f5d6 100644 --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c @@ -212,7 +212,7 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector) struct edid *edid; int ret; - edid = drm_get_edid(connector, hdmi->i2c); + edid = drm_get_edid(connector, hdmi->ddc_i2c ?: hdmi->i2c); if (!edid) return 0; @@ -228,6 +228,28 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector) return ret; } +static struct i2c_adapter *sun4i_hdmi_get_ddc(struct device *dev) +{ + struct device_node *phandle, *remote; + struct i2c_adapter *ddc; + + remote = of_graph_get_remote_node(dev->of_node, 1, -1); + if (!remote) + return ERR_PTR(-EINVAL); + + phandle = of_parse_phandle(remote, "ddc-i2c-bus", 0); + of_node_put(remote); + if (!phandle) + return NULL; + + ddc = of_get_i2c_adapter_by_node(phandle); + of_node_put(phandle); + if (!ddc) + return ERR_PTR(-EPROBE_DEFER); + + return ddc; +} + static const struct drm_connector_helper_funcs sun4i_hdmi_connector_helper_funcs = { .get_modes = sun4i_hdmi_get_modes, }; @@ -575,6 +597,12 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master, goto err_disable_mod_clk; } + hdmi->ddc_i2c = sun4i_hdmi_get_ddc(dev); + if (IS_ERR(hdmi->ddc_i2c)) { + ret = PTR_ERR(hdmi->ddc_i2c); + goto err_del_i2c_adapter; + } + drm_encoder_helper_add(&hdmi->encoder, &sun4i_hdmi_helper_funcs); ret = drm_encoder_init(drm, @@ -584,14 +612,14 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master, NULL); if (ret) { dev_err(dev, "Couldn't initialise the HDMI encoder\n"); - goto err_del_i2c_adapter; + goto err_put_ddc_i2c; } hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); if (!hdmi->encoder.possible_crtcs) { ret = -EPROBE_DEFER; - goto err_del_i2c_adapter; + goto err_put_ddc_i2c; } #ifdef CONFIG_DRM_SUN4I_HDMI_CEC @@ -630,6 +658,8 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master, err_cleanup_connector: cec_delete_adapter(hdmi->cec_adap); drm_encoder_cleanup(&hdmi->encoder); +err_put_ddc_i2c: + i2c_put_adapter(hdmi->ddc_i2c); err_del_i2c_adapter: i2c_del_adapter(hdmi->i2c); err_disable_mod_clk: @@ -650,6 +680,7 @@ static void sun4i_hdmi_unbind(struct device *dev, struct device *master, drm_connector_cleanup(&hdmi->connector); drm_encoder_cleanup(&hdmi->encoder); i2c_del_adapter(hdmi->i2c); + i2c_put_adapter(hdmi->ddc_i2c); clk_disable_unprepare(hdmi->mod_clk); clk_disable_unprepare(hdmi->bus_clk); } -- 2.21.0
WARNING: multiple messages have this Message-ID (diff)
From: Mans Rullgard <mans@mansr.com> To: Maxime Ripard <maxime.ripard@bootlin.com>, David Airlie <airlied@linux.ie>, Chen-Yu Tsai <wens@csie.org> Cc: linux-arm-kernel@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/sun4i: hdmi: add support for ddc-i2c-bus property Date: Mon, 11 Mar 2019 13:47:13 +0000 [thread overview] Message-ID: <20190311134713.25876-1-mans@mansr.com> (raw) Sometimes it is desirabled to use a separate i2c controller for ddc access. This adds support for the ddc-i2c-bus property of the hdmi-connector node, using the specified controller if provided. Signed-off-by: Mans Rullgard <mans@mansr.com> --- drivers/gpu/drm/sun4i/sun4i_hdmi.h | 1 + drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 37 +++++++++++++++++++++++--- 2 files changed, 35 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h index b685ee11623d..b08c4453d47c 100644 --- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h @@ -269,6 +269,7 @@ struct sun4i_hdmi { struct clk *tmds_clk; struct i2c_adapter *i2c; + struct i2c_adapter *ddc_i2c; /* Regmap fields for I2C adapter */ struct regmap_field *field_ddc_en; diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c index 061d2e0d9011..5b2fac79f5d6 100644 --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c @@ -212,7 +212,7 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector) struct edid *edid; int ret; - edid = drm_get_edid(connector, hdmi->i2c); + edid = drm_get_edid(connector, hdmi->ddc_i2c ?: hdmi->i2c); if (!edid) return 0; @@ -228,6 +228,28 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector) return ret; } +static struct i2c_adapter *sun4i_hdmi_get_ddc(struct device *dev) +{ + struct device_node *phandle, *remote; + struct i2c_adapter *ddc; + + remote = of_graph_get_remote_node(dev->of_node, 1, -1); + if (!remote) + return ERR_PTR(-EINVAL); + + phandle = of_parse_phandle(remote, "ddc-i2c-bus", 0); + of_node_put(remote); + if (!phandle) + return NULL; + + ddc = of_get_i2c_adapter_by_node(phandle); + of_node_put(phandle); + if (!ddc) + return ERR_PTR(-EPROBE_DEFER); + + return ddc; +} + static const struct drm_connector_helper_funcs sun4i_hdmi_connector_helper_funcs = { .get_modes = sun4i_hdmi_get_modes, }; @@ -575,6 +597,12 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master, goto err_disable_mod_clk; } + hdmi->ddc_i2c = sun4i_hdmi_get_ddc(dev); + if (IS_ERR(hdmi->ddc_i2c)) { + ret = PTR_ERR(hdmi->ddc_i2c); + goto err_del_i2c_adapter; + } + drm_encoder_helper_add(&hdmi->encoder, &sun4i_hdmi_helper_funcs); ret = drm_encoder_init(drm, @@ -584,14 +612,14 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master, NULL); if (ret) { dev_err(dev, "Couldn't initialise the HDMI encoder\n"); - goto err_del_i2c_adapter; + goto err_put_ddc_i2c; } hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); if (!hdmi->encoder.possible_crtcs) { ret = -EPROBE_DEFER; - goto err_del_i2c_adapter; + goto err_put_ddc_i2c; } #ifdef CONFIG_DRM_SUN4I_HDMI_CEC @@ -630,6 +658,8 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master, err_cleanup_connector: cec_delete_adapter(hdmi->cec_adap); drm_encoder_cleanup(&hdmi->encoder); +err_put_ddc_i2c: + i2c_put_adapter(hdmi->ddc_i2c); err_del_i2c_adapter: i2c_del_adapter(hdmi->i2c); err_disable_mod_clk: @@ -650,6 +680,7 @@ static void sun4i_hdmi_unbind(struct device *dev, struct device *master, drm_connector_cleanup(&hdmi->connector); drm_encoder_cleanup(&hdmi->encoder); i2c_del_adapter(hdmi->i2c); + i2c_put_adapter(hdmi->ddc_i2c); clk_disable_unprepare(hdmi->mod_clk); clk_disable_unprepare(hdmi->bus_clk); } -- 2.21.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2019-03-11 13:47 UTC|newest] Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-03-11 13:47 Mans Rullgard [this message] 2019-03-11 13:47 ` [PATCH] drm/sun4i: hdmi: add support for ddc-i2c-bus property Mans Rullgard 2019-03-11 15:47 ` Maxime Ripard 2019-03-11 15:47 ` Maxime Ripard 2019-03-11 15:47 ` Maxime Ripard 2019-03-11 16:11 ` Måns Rullgård 2019-03-11 16:11 ` Måns Rullgård 2019-03-14 15:41 ` Maxime Ripard 2019-03-14 15:41 ` Maxime Ripard 2019-03-14 16:09 ` Måns Rullgård 2019-03-14 16:09 ` Måns Rullgård 2019-03-18 15:50 ` Maxime Ripard 2019-03-18 15:50 ` Maxime Ripard 2019-03-18 16:23 ` Måns Rullgård 2019-03-18 16:23 ` Måns Rullgård 2019-03-19 12:34 ` Maxime Ripard 2019-03-19 12:34 ` Maxime Ripard 2019-03-19 12:34 ` Maxime Ripard 2019-03-19 12:48 ` Måns Rullgård 2019-03-19 12:48 ` Måns Rullgård 2019-03-21 15:44 ` Maxime Ripard 2019-03-21 15:44 ` Maxime Ripard 2019-03-21 18:00 ` Måns Rullgård 2019-03-21 18:00 ` Måns Rullgård 2019-03-26 19:49 ` Maxime Ripard 2019-03-26 19:49 ` Maxime Ripard 2019-03-28 13:02 ` Mans Rullgard 2019-03-28 13:02 ` Mans Rullgard 2019-04-01 11:58 ` Maxime Ripard 2019-04-01 11:58 ` Maxime Ripard
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20190311134713.25876-1-mans@mansr.com \ --to=mans@mansr.com \ --cc=airlied@linux.ie \ --cc=dri-devel@lists.freedesktop.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=maxime.ripard@bootlin.com \ --cc=wens@csie.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.