[PATCH 2/3] drm/bridge: dw-hdmi: support optional supply regulators
Heiko Stuebner
heiko at sntech.de
Mon Mar 9 16:22:49 PDT 2015
At least the Rockchip variant of the dw_hdmi can have controllable power supplies
providing 1.0 and 1.8V. Therefore add the possibility for the generic bridge
driver to enable supplies provided by the hw-specific drivers.
Signed-off-by: Heiko Stuebner <heiko at sntech.de>
---
.../devicetree/bindings/drm/bridge/dw_hdmi.txt | 5 ++++
drivers/gpu/drm/bridge/dw_hdmi.c | 27 +++++++++++++++++++++-
drivers/gpu/drm/imx/dw_hdmi-imx.c | 3 ++-
drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 15 +++++++++++-
include/drm/bridge/dw_hdmi.h | 3 ++-
5 files changed, 49 insertions(+), 4 deletions(-)
diff --git a/Documentation/devicetree/bindings/drm/bridge/dw_hdmi.txt b/Documentation/devicetree/bindings/drm/bridge/dw_hdmi.txt
index a905c14..bb74640 100644
--- a/Documentation/devicetree/bindings/drm/bridge/dw_hdmi.txt
+++ b/Documentation/devicetree/bindings/drm/bridge/dw_hdmi.txt
@@ -22,6 +22,11 @@ Optional properties
- ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing
- clocks, clock-names: phandle to the HDMI CEC clock, name should be "cec"
+Supplies:
+rockchip,rk3288-dw-hdmi handles two optional power supplies:
+- avdd1v0-supply: 1.0V power supply
+- avdd1v8-supply: 1.8V power supply
+
Example:
hdmi: hdmi at 0120000 {
compatible = "fsl,imx6q-hdmi";
diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index cd6a706..9f8999d 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -17,6 +17,7 @@
#include <linux/clk.h>
#include <linux/hdmi.h>
#include <linux/of_device.h>
+#include <linux/regulator/consumer.h>
#include <drm/drm_of.h>
#include <drm/drmP.h>
@@ -114,6 +115,9 @@ struct dw_hdmi {
struct hdmi_data_info hdmi_data;
const struct dw_hdmi_plat_data *plat_data;
+ struct regulator_bulk_data *supplies;
+ int nsupplies;
+
int vic;
u8 edid[HDMI_EDID_LEN];
@@ -879,6 +883,12 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi)
int i, ret;
bool cscon = false;
+ if (hdmi->nsupplies > 0) {
+ ret = regulator_bulk_enable(hdmi->nsupplies, hdmi->supplies);
+ if (ret)
+ return ret;
+ }
+
/*check csc whether needed activated in HDMI mode */
cscon = (is_color_space_conversion(hdmi) &&
!hdmi->hdmi_data.video_mode.mdvi);
@@ -1105,6 +1115,9 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi)
dw_hdmi_phy_enable_tmds(hdmi, 0);
dw_hdmi_phy_enable_power(hdmi, 0);
+ if (hdmi->nsupplies > 0)
+ regulator_bulk_disable(hdmi->nsupplies, hdmi->supplies);
+
hdmi->phy_enabled = false;
}
@@ -1549,7 +1562,8 @@ static int dw_hdmi_register(struct drm_device *drm, struct dw_hdmi *hdmi)
int dw_hdmi_bind(struct device *dev, struct device *master,
void *data, struct drm_encoder *encoder,
struct resource *iores, int irq,
- const struct dw_hdmi_plat_data *plat_data)
+ const struct dw_hdmi_plat_data *plat_data,
+ struct regulator_bulk_data *supplies, int nsupplies)
{
struct drm_device *drm = data;
struct device_node *np = dev->of_node;
@@ -1602,6 +1616,17 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
if (IS_ERR(hdmi->regs))
return PTR_ERR(hdmi->regs);
+ if (nsupplies > 0) {
+ ret = devm_regulator_bulk_get(hdmi->dev, nsupplies, supplies);
+ if (ret == -EPROBE_DEFER)
+ return ret;
+ if (ret)
+ nsupplies = 0;
+ }
+
+ hdmi->supplies = supplies;
+ hdmi->nsupplies = nsupplies;
+
hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr");
if (IS_ERR(hdmi->isfr_clk)) {
ret = PTR_ERR(hdmi->isfr_clk);
diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c b/drivers/gpu/drm/imx/dw_hdmi-imx.c
index 121d30c..153e259 100644
--- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
+++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
@@ -214,7 +214,8 @@ static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
DRM_MODE_ENCODER_TMDS);
- return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
+ return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data,
+ NULL, 0);
}
static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index d236faa..c085e88 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -11,6 +11,7 @@
#include <linux/platform_device.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
#include <drm/drm_of.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
@@ -24,6 +25,8 @@
#define GRF_SOC_CON6 0x025c
#define HDMI_SEL_VOP_LIT (1 << 4)
+#define HDMI_NUM_REGULATORS 2
+
struct rockchip_hdmi {
struct device *dev;
struct regmap *regmap;
@@ -248,6 +251,7 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
struct platform_device *pdev = to_platform_device(dev);
const struct dw_hdmi_plat_data *plat_data;
const struct of_device_id *match;
+ struct regulator_bulk_data *supplies;
struct drm_device *drm = data;
struct drm_encoder *encoder;
struct rockchip_hdmi *hdmi;
@@ -275,6 +279,14 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
if (!iores)
return -ENXIO;
+ supplies = devm_kcalloc(&pdev->dev, HDMI_NUM_REGULATORS,
+ sizeof(*supplies), GFP_KERNEL);
+ if (!supplies)
+ return -ENOMEM;
+
+ supplies[0].supply = "avdd1v0";
+ supplies[1].supply = "avdd1v8";
+
platform_set_drvdata(pdev, hdmi);
encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
@@ -297,7 +309,8 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
drm_encoder_init(drm, encoder, &dw_hdmi_rockchip_encoder_funcs,
DRM_MODE_ENCODER_TMDS);
- return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
+ return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data,
+ supplies, HDMI_NUM_REGULATORS);
}
static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 5a4f490..7b0fac5 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -57,5 +57,6 @@ void dw_hdmi_unbind(struct device *dev, struct device *master, void *data);
int dw_hdmi_bind(struct device *dev, struct device *master,
void *data, struct drm_encoder *encoder,
struct resource *iores, int irq,
- const struct dw_hdmi_plat_data *plat_data);
+ const struct dw_hdmi_plat_data *plat_data,
+ struct regulator_bulk_data *supplies, int nsupplies);
#endif /* __IMX_HDMI_H__ */
--
2.1.4
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