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Message-Id: <20190409002452.14551-9-megous@megous.com> Date: Tue, 9 Apr 2019 02:24:47 +0200 From: megous@...ous.com To: linux-sunxi@...glegroups.com, Maxime Ripard <maxime.ripard@...tlin.com>, Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>, Linus Walleij <linus.walleij@...aro.org> Cc: Ondrej Jirman <megous@...ous.com>, David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>, Mark Rutland <mark.rutland@....com>, Giuseppe Cavallaro <peppe.cavallaro@...com>, Alexandre Torgue <alexandre.torgue@...com>, Jose Abreu <joabreu@...opsys.com>, "David S. Miller" <davem@...emloft.net>, Maxime Coquelin <mcoquelin.stm32@...il.com>, Arend van Spriel <arend.vanspriel@...adcom.com>, Franky Lin <franky.lin@...adcom.com>, Hante Meuleman <hante.meuleman@...adcom.com>, Chi-Hsien Lin <chi-hsien.lin@...ress.com>, Wright Feng <wright.feng@...ress.com>, Kalle Valo <kvalo@...eaurora.org>, Naveen Gupta <naveen.gupta@...ress.com>, dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, linux-wireless@...r.kernel.org, brcm80211-dev-list.pdl@...adcom.com, brcm80211-dev-list@...ress.com, linux-gpio@...r.kernel.org Subject: [PATCH v2 08/13] drm: sun4i: Add support for enabling DDC I2C bus to dw_hdmi glue From: Ondrej Jirman <megous@...ous.com> Orange Pi 3 board requires enabling DDC I2C bus via some GPIO connected transistors, before it can be used. Model this as a power supply for DDC (via regulator framework). Signed-off-by: Ondrej Jirman <megous@...ous.com> --- drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c | 17 ++++++++++++++++- drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h | 1 + 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c index dc47720c99ba..a1518525fa2f 100644 --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c @@ -146,16 +146,28 @@ static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master, return PTR_ERR(hdmi->regulator); } + hdmi->ddc_regulator = devm_regulator_get(dev, "ddc"); + if (IS_ERR(hdmi->ddc_regulator)) { + dev_err(dev, "Couldn't get ddc regulator\n"); + return PTR_ERR(hdmi->ddc_regulator); + } + ret = regulator_enable(hdmi->regulator); if (ret) { dev_err(dev, "Failed to enable regulator\n"); return ret; } + ret = regulator_enable(hdmi->ddc_regulator); + if (ret) { + dev_err(dev, "Failed to enable ddc regulator\n"); + goto err_disable_regulator; + } + ret = reset_control_deassert(hdmi->rst_ctrl); if (ret) { dev_err(dev, "Could not deassert ctrl reset control\n"); - goto err_disable_regulator; + goto err_disable_ddc_regulator; } ret = clk_prepare_enable(hdmi->clk_tmds); @@ -208,6 +220,8 @@ static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master, clk_disable_unprepare(hdmi->clk_tmds); err_assert_ctrl_reset: reset_control_assert(hdmi->rst_ctrl); +err_disable_ddc_regulator: + regulator_disable(hdmi->ddc_regulator); err_disable_regulator: regulator_disable(hdmi->regulator); @@ -223,6 +237,7 @@ static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master, sun8i_hdmi_phy_remove(hdmi); clk_disable_unprepare(hdmi->clk_tmds); reset_control_assert(hdmi->rst_ctrl); + regulator_disable(hdmi->ddc_regulator); regulator_disable(hdmi->regulator); } diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h index 720c5aa8adc1..6e93d55560b6 100644 --- a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h +++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h @@ -188,6 +188,7 @@ struct sun8i_dw_hdmi { struct sun8i_hdmi_phy *phy; struct dw_hdmi_plat_data plat_data; struct regulator *regulator; + struct regulator *ddc_regulator; const struct sun8i_dw_hdmi_quirks *quirks; struct reset_control *rst_ctrl; }; -- 2.21.0
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