gpio used for HDMI hot plug detection is useless,
HDMI_STI register contains an hot plug detection status bit.
Fix binding documentation.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard at linaro.org>
---
Documentation/devicetree/bindings/gpu/st,stih4xx.txt | 2 --
drivers/gpu/drm/sti/sti_hdmi.c | 11 ++---------
drivers/gpu/drm/sti/sti_hdmi.h | 5 +++--
3 files changed, 5 insertions(+), 13 deletions(-)
diff --git a/Documentation/devicetree/bindings/gpu/st,stih4xx.txt
b/Documentation/devicetree/bindings/gpu/st,stih4xx.txt
index 8885d9e..32cfc7b 100644
--- a/Documentation/devicetree/bindings/gpu/st,stih4xx.txt
+++ b/Documentation/devicetree/bindings/gpu/st,stih4xx.txt
@@ -68,7 +68,6 @@ STMicroelectronics stih4xx platforms
number of clocks may depend of the SoC type.
- clock-names: names of the clocks listed in clocks property in the same
order.
- - hdmi,hpd-gpio: gpio id to detect if an hdmi cable is plugged or not.
- ddc: phandle of an I2C controller used for DDC EDID probing
sti-hda:
@@ -174,7 +173,6 @@ Example:
interrupt-names = "irq";
clock-names = "pix", "tmds", "phy", "audio";
clocks = <&clockgen_c_vcc
CLK_S_PIX_HDMI>, <&clockgen_c_vcc CLK_S_TMDS_HDMI>, <&clockgen_c_vcc
CLK_S_HDMI_REJECT_PLL>, <&clockgen_b1 CLK_S_PCM_0>;
- hdmi,hpd-gpio = <&PIO2 5>;
};
sti-hda at fe85a000 {
diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index fed1b5f..1921197 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -130,8 +130,7 @@ static irqreturn_t hdmi_irq_thread(int irq, void *arg)
/* Hot plug/unplug IRQ */
if (hdmi->irq_status & HDMI_INT_HOT_PLUG) {
- /* read gpio to get the status */
- hdmi->hpd = gpio_get_value(hdmi->hpd_gpio);
+ hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
if (hdmi->drm_dev)
drm_helper_hpd_irq_event(hdmi->drm_dev);
}
@@ -766,13 +765,7 @@ static int sti_hdmi_probe(struct platform_device *pdev)
return PTR_ERR(hdmi->clk_audio);
}
- hdmi->hpd_gpio = of_get_named_gpio(np, "hdmi,hpd-gpio", 0);
- if (hdmi->hpd_gpio < 0) {
- DRM_ERROR("Failed to get hdmi hpd-gpio\n");
- return -EIO;
- }
-
- hdmi->hpd = gpio_get_value(hdmi->hpd_gpio);
+ hdmi->hpd = readl(hdmi->regs + HDMI_STA) & HDMI_STA_HOT_PLUG;
init_waitqueue_head(&hdmi->wait_event);
diff --git a/drivers/gpu/drm/sti/sti_hdmi.h b/drivers/gpu/drm/sti/sti_hdmi.h
index d00a3e0..3d22390 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.h
+++ b/drivers/gpu/drm/sti/sti_hdmi.h
@@ -14,6 +14,9 @@
#define HDMI_STA 0x0010
#define HDMI_STA_DLL_LCK BIT(5)
+#define HDMI_STA_HOT_PLUG_SHIFT 4
+#define HDMI_STA_HOT_PLUG (1 << HDMI_STA_HOT_PLUG_SHIFT)
+
struct sti_hdmi;
struct hdmi_phy_ops {
@@ -37,7 +40,6 @@ struct hdmi_phy_ops {
* @irq_status: interrupt status register
* @phy_ops: phy start/stop operations
* @enabled: true if hdmi is enabled else false
- * @hpd_gpio: hdmi hot plug detect gpio number
* @hpd: hot plug detect status
* @wait_event: wait event
* @event_received: wait event status
@@ -57,7 +59,6 @@ struct sti_hdmi {
u32 irq_status;
struct hdmi_phy_ops *phy_ops;
bool enabled;
- int hpd_gpio;
bool hpd;
wait_queue_head_t wait_event;
bool event_received;
--
1.9.1
