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drm/msm : add utility function to dump HDMI registers

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Add a utility function to dump HDMI core registers to
command line. This will facilitate debugging issues by
just calling this API wherever necessary.

Change-Id: I4a6727dca34edf4bb1c240adc7b93f50a7530b98
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
This commit is contained in:
Abhinav Kumar 2017-06-13 16:03:05 -07:00
parent ffc2849b61
commit 76dbbea975
2 changed files with 54 additions and 1 deletions
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53
drivers/gpu/drm/msm/hdmi-staging/sde_hdmi_util.c
View file

@ -68,6 +68,59 @@ static void sde_hdmi_hdcp2p2_ddc_clear_status(struct sde_hdmi *display)
hdmi_write(hdmi, HDMI_HDCP2P2_DDC_STATUS, reg_val);
}
/**
* sde_hdmi_dump_regs - utility to dump HDMI regs
* @hdmi_display: Pointer to private display handle
* Return : void
*/
void sde_hdmi_dump_regs(void *hdmi_display)
{
struct sde_hdmi *display = (struct sde_hdmi *)hdmi_display;
struct hdmi *hdmi;
int i;
u32 addr_off = 0;
u32 len = 0;
if (!display) {
pr_err("invalid input\n");
return;
}
hdmi = display->ctrl.ctrl;
if (!hdmi) {
pr_err("invalid input\n");
return;
}
if (!hdmi->power_on || !display->connected) {
SDE_ERROR("HDMI display is not ready\n");
return;
}
len = hdmi->mmio_len;
if (len % 16)
len += 16;
len /= 16;
pr_info("HDMI CORE regs\n");
for (i = 0; i < len; i++) {
u32 x0, x4, x8, xc;
x0 = hdmi_read(hdmi, addr_off+0x0);
x4 = hdmi_read(hdmi, addr_off+0x4);
x8 = hdmi_read(hdmi, addr_off+0x8);
xc = hdmi_read(hdmi, addr_off+0xc);
pr_info("%08x : %08x %08x %08x %08x\n", addr_off, x0, x4, x8,
xc);
addr_off += 16;
}
}
int sde_hdmi_ddc_hdcp2p2_isr(void *hdmi_display)
{
struct sde_hdmi_tx_hdcp2p2_ddc_data *data;

2
drivers/gpu/drm/msm/hdmi-staging/sde_hdmi_util.h
View file

@ -160,5 +160,5 @@ void sde_hdmi_hdcp2p2_ddc_disable(void *hdmi_display);
int sde_hdmi_hdcp2p2_read_rxstatus(void *hdmi_display);
void sde_hdmi_ddc_config(void *hdmi_display);
int sde_hdmi_ddc_hdcp2p2_isr(void *hdmi_display);
void sde_hdmi_dump_regs(void *hdmi_display);
#endif /* _SDE_HDMI_UTIL_H_ */