msm: display: HDMI: Driver support for CEC feature
Driver implementation of HDMI CEC feature. Support includes
CEC frame send and frame receive. Support added for sysfs interface
for CEC daemon to interact with the driver for reading and writing frames.
sysfs interface
/sys/class/graphics/fb1/cec
Read: CEC block state.
Write: Enable/Disable CEC block.
/sys/class/graphics/fb1/cec_logical_addr
Read: Print CEC logical address
Write: Set CEC logical address which is used for
addressing CEC messages to and from MSM
/sys/class/graphics/fb1/cec_rd_frame
Read: Read rcvd CEC message from message queue.
If queue is empty -EBUSY.
If CEC block is disabled -EPERM.
Write: N/A
/sys/class/graphics/fb1/cec_wr_frame
Read: N/A
Write: Write to send CEC message.
If CEC line arbitration fault/no ack -EINVAL.
If CEC block is disabled -EPERM.
Change-Id: I62ce418b7f1e887550319081cc4b78fbd564a6f5
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>
diff --git a/drivers/video/msm/hdmi_msm.h b/drivers/video/msm/hdmi_msm.h
index 2f44b6d..6d19d157 100644
--- a/drivers/video/msm/hdmi_msm.h
+++ b/drivers/video/msm/hdmi_msm.h
@@ -33,7 +33,22 @@
#define HDMI_INP(offset) inpdw(MSM_HDMI_BASE+(offset))
#endif
+
+/*
+ * Ref. HDMI 1.4a
+ * Supplement-1 CEC Section 6, 7
+ */
+struct hdmi_msm_cec_msg {
+ uint8 sender_id;
+ uint8 recvr_id;
+ uint8 opcode;
+ uint8 operand[15];
+ uint8 frame_size;
+ uint8 retransmit;
+};
+
#define QFPROM_BASE ((uint32)hdmi_msm_state->qfprom_io)
+#define HDMI_BASE ((uint32)hdmi_msm_state->hdmi_io)
struct hdmi_msm_state_type {
boolean panel_power_on;
@@ -58,6 +73,23 @@
struct timer_list hdcp_timer;
#endif /* CONFIG_FB_MSM_HDMI_MSM_PANEL_HDCP_SUPPORT */
+#ifdef CONFIG_FB_MSM_HDMI_MSM_PANEL_CEC_SUPPORT
+ boolean cec_enabled;
+ int cec_logical_addr;
+ struct completion cec_frame_wr_done;
+#define CEC_STATUS_WR_ERROR 0x0001
+#define CEC_STATUS_WR_DONE 0x0002
+#define CEC_STATUS_WR_TMOUT 0x0004
+ uint32 cec_frame_wr_status;
+
+ struct hdmi_msm_cec_msg *cec_queue_start;
+ struct hdmi_msm_cec_msg *cec_queue_wr;
+ struct hdmi_msm_cec_msg *cec_queue_rd;
+ boolean cec_queue_full;
+#define CEC_QUEUE_SIZE 16
+#define CEC_QUEUE_END (hdmi_msm_state->cec_queue_start + CEC_QUEUE_SIZE)
+#endif /* CONFIG_FB_MSM_HDMI_MSM_PANEL_CEC_SUPPORT */
+
int irq;
struct msm_hdmi_platform_data *pd;
struct clk *hdmi_app_clk;
@@ -84,4 +116,12 @@
void hdmi_msm_phy_status_poll(void);
#endif
+#ifdef CONFIG_FB_MSM_HDMI_MSM_PANEL_CEC_SUPPORT
+void hdmi_msm_cec_init(void);
+void hdmi_msm_cec_write_logical_addr(int addr);
+void hdmi_msm_cec_msg_recv(void);
+void hdmi_msm_cec_one_touch_play(void);
+void hdmi_msm_cec_msg_send(struct hdmi_msm_cec_msg *msg);
+#endif /* CONFIG_FB_MSM_HDMI_MSM_PANEL_CEC_SUPPORT */
+
#endif /* __HDMI_MSM_H__ */