From: Hang Cheng <hang.cheng@amlogic.com>
Date: Fri, 13 Apr 2018 08:19:53 +0000 (+0800)
Subject: hdmirx: add pddq selection interface when suspend/resume
X-Git-Tag: khadas-vims-v0.9.6-release~2154
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f23af31d600bd0e83533c701b0caa6b8d040c611;p=platform%2Fkernel%2Flinux-amlogic.git

hdmirx: add pddq selection interface when suspend/resume

PD#164216: hdmirx: add pddq selection interface when suspend/resume

when suspend, set pddq down by default, use another Rxsense pulse
during resume to recovery MTK box from hdcp2.2 transaction

Change-Id: Icc574847105a00c5d441fdd589b928eaaf2acf05
Signed-off-by: Hang Cheng <hang.cheng@amlogic.com>
---

diff --git a/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_drv.c b/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_drv.c
index 29ffcf2..22b2a53 100644
--- a/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_drv.c
+++ b/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_drv.c
@@ -120,8 +120,19 @@ int en_4k_2_2k;
 int en_4k_timing = 1;
 bool hdmi_cec_en;
 int skip_frame_cnt = 1;
-
-
+/* suspend_pddq_sel:
+ * 0: keep phy on when suspend(don't need phy init when
+ *   resume), it doesn't work now because phy VDDIO_3.3V
+ *   will power off when suspend, and tmds clk will be low;
+ * 1&2: when CEC off there's no SDA low issue for MTK box,
+ *   these workaround are not needed
+ * 1: disable phy when suspend, set rxsense 1 and 0 when resume to
+ *   release DDC from hdcp2.2 for MTK box, as LG 49UB8800-CE does
+ * 2: disable phy when suspend, set rxsense 1 and 0 when suspend
+ *   to release DDC from hdcp2.2 for MTK xiaomi box
+ * other value: keep previous logic
+ */
+int suspend_pddq_sel = 1;
 
 struct reg_map reg_maps[MAP_ADDR_MODULE_NUM];
 
@@ -1890,8 +1901,22 @@ static int hdmirx_suspend(struct platform_device *pdev, pm_message_t state)
 	if (!hdmi_cec_en)
 		rx_force_hpd_cfg(0);
 
-	/* phy powerdown */
-	hdmirx_phy_pddq(1);
+	if (suspend_pddq_sel == 0)
+		rx_pr("don't set phy pddq down\n");
+	else {
+		/* there's no SDA low issue on MTK box when CEC off */
+		if (hdmi_cec_en != 0) {
+			if (suspend_pddq_sel == 2) {
+				/* set rxsense pulse */
+				mdelay(10);
+				hdmirx_phy_pddq(1);
+				mdelay(10);
+				hdmirx_phy_pddq(0);
+			}
+		}
+		/* phy powerdown */
+		hdmirx_phy_pddq(1);
+	}
 	if (hdcp22_on)
 		hdcp22_suspend();
 	rx_pr("[hdmirx]: suspend success\n");
@@ -1903,6 +1928,18 @@ static int hdmirx_resume(struct platform_device *pdev)
 	struct hdmirx_dev_s *hdevp;
 
 	hdevp = platform_get_drvdata(pdev);
+	if (hdmi_cec_en != 0) {
+		if (suspend_pddq_sel == 1) {
+			/* set rxsense pulse, if delay time between
+			 * rxsense pulse and phy_int shottern than
+			 * 50ms, SDA may be pulled low 800ms on MTK box
+			 */
+			hdmirx_phy_pddq(0);
+			mdelay(10);
+			hdmirx_phy_pddq(1);
+			mdelay(50);
+		}
+	}
 	hdmirx_phy_init();
 	add_timer(&hdevp->timer);
 	if (hdcp22_on)
diff --git a/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_drv.h b/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_drv.h
index 736e5d1..a3e114b 100644
--- a/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_drv.h
+++ b/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_drv.h
@@ -34,7 +34,7 @@
 //#include "hdmi_rx_edid.h"
 
 
-#define RX_VER0 "ver.2018-04-11"
+#define RX_VER0 "ver.2018-04-13"
 /*
  *
  *
@@ -424,6 +424,7 @@ extern int skip_frame_cnt;
 extern bool hdcp_enable;
 extern int log_level;
 extern int sm_pause;
+extern int suspend_pddq_sel;
 extern int rx_set_global_variable(const char *buf, int size);
 extern void rx_get_global_variable(const char *buf);
 extern int rx_pr(const char *fmt, ...);
diff --git a/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_wrapper.c b/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_wrapper.c
index ba138ba..8dca28c 100644
--- a/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_wrapper.c
+++ b/drivers/amlogic/media/vin/tvin/hdmirx/hdmi_rx_wrapper.c
@@ -1506,6 +1506,8 @@ int rx_set_global_variable(const char *buf, int size)
 	if (set_pr_var(tmpbuf, sig_unstable_reset_hpd_max, value, &index, ret))
 		return pr_var(sig_unstable_reset_hpd_max, index);
 	#endif
+	if (set_pr_var(tmpbuf, suspend_pddq_sel, value, &index, ret))
+		return pr_var(suspend_pddq_sel, index);
 	return 0;
 }
 
@@ -1602,6 +1604,7 @@ void rx_get_global_variable(const char *buf)
 	pr_var(enable_hpd_reset, i++);
 	pr_var(sig_unstable_reset_hpd_max, i++);
 	#endif
+	pr_var(suspend_pddq_sel, i++);
 }
 
 void skip_frame(void)