[PATCH 10/49] staging: hikey9xx/gpu: add debug prints for this driver

[Mauro Carvalho Chehab]

From: Xiubin Zhang <zhangxiub...@huawei.com>

Add some debug prints on adv7535 and kirin_drm_drv.

Signed-off-by: Xiubin Zhang <zhangxiub...@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
---
 drivers/staging/hikey9xx/gpu/hdmi/adv7535.c  | 40 ++++++++++++++++++--
 drivers/staging/hikey9xx/gpu/kirin_drm_drv.c |  2 +-
 2 files changed, 37 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/hikey9xx/gpu/hdmi/adv7535.c 
b/drivers/staging/hikey9xx/gpu/hdmi/adv7535.c
index a21a8f8b917e..04c1e7b9ca8e 100644
--- a/drivers/staging/hikey9xx/gpu/hdmi/adv7535.c
+++ b/drivers/staging/hikey9xx/gpu/hdmi/adv7535.c
@@ -28,7 +28,8 @@
 
 #include "adv7535.h"
 
-#define HPD_ENABLE     1
+//#define HPD_ENABLE   1
+#define HPD_ENABLE     0
 //#define TEST_COLORBAR_DISPLAY
 #ifdef CONFIG_HDMI_ADV7511_AUDIO
 extern int adv7511_audio_init(struct device *dev);
@@ -785,19 +786,25 @@ adv7511_detect(struct adv7511 *adv7511,
 {
        enum drm_connector_status status;
        unsigned int val;
+       unsigned int time = 0;
 #if HPD_ENABLE
        bool hpd;
 #endif
        int ret;
 
        ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, &val);
-       if (ret < 0)
+       if (ret < 0) {
+               DRM_ERROR("regmap_read fail, ret = %d \n", ret);
                return connector_status_disconnected;
+       }
 
-       if (val & ADV7511_STATUS_HPD)
+       if (val & ADV7511_STATUS_HPD) {
+               DRM_INFO("connected : regmap_read val = 0x%x \n", val);
                status = connector_status_connected;
-       else
+       } else {
+               DRM_INFO("disconnected : regmap_read val = 0x%x \n", val);
                status = connector_status_disconnected;
+       }
 
 #if HPD_ENABLE
        hpd = adv7511_hpd(adv7511);
@@ -820,7 +827,32 @@ adv7511_detect(struct adv7511 *adv7511,
        }
 #endif
 
+       if (status == connector_status_disconnected) {
+               do {
+                       ret = regmap_read(adv7511->regmap, ADV7511_REG_STATUS, 
&val);
+                       if (ret < 0) {
+                               DRM_ERROR("regmap_read fail, ret = %d \n", ret);
+                               return connector_status_disconnected;
+                       }
+
+                       if (val & ADV7511_STATUS_HPD) {
+                               DRM_INFO("connected : regmap_read val = 0x%x 
\n", val);
+                               status = connector_status_connected;
+                       } else {
+                               DRM_INFO("disconnected : regmap_read val = 0x%x 
\n", val);
+                               status = connector_status_disconnected;
+                       }
+                       time ++;
+                       mdelay(20);
+               } while (status == connector_status_disconnected && time < 10);
+       }
+
+       if (time >= 10)
+               DRM_ERROR("Read connector status timout, time = %d \n", time);
+
        adv7511->status = status;
+
+       DRM_INFO("hdmi connector status = %d \n", status);
        return status;
 }
 
diff --git a/drivers/staging/hikey9xx/gpu/kirin_drm_drv.c 
b/drivers/staging/hikey9xx/gpu/kirin_drm_drv.c
index 958aafa1a09c..ec1f668f2d21 100644
--- a/drivers/staging/hikey9xx/gpu/kirin_drm_drv.c
+++ b/drivers/staging/hikey9xx/gpu/kirin_drm_drv.c
@@ -144,7 +144,7 @@ static int kirin_drm_kms_init(struct drm_device *dev)
        /* init kms poll for handling hpd */
        drm_kms_helper_poll_init(dev);
 
-#if 0
+#if 1
        /* force detection after connectors init */
        (void)drm_helper_hpd_irq_event(dev);
 #endif
-- 
2.26.2

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