intel_audio_dump/bdw: dump debug registers for audio immediate commands

This patch dumps debug registers to check audio immediate command, response
and status.

The audio driver will fall back into immediate command mode if normal
communication between controller and codec is dead.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Reviewed-by: Xingchao Wang <xingchao.wang@intel.com>
[Ben: Small printf changes to remove compiler warning]
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>

diff --git a/tools/intel_audio_dump.c b/tools/intel_audio_dump.c
index b4d704b..fd37ebd 100644 (file)
--- a/tools/intel_audio_dump.c
+++ b/tools/intel_audio_dump.c
@@ -240,6 +240,16 @@ static const char * const n_index_value[] = {
        [1] = "DisplayPort",
 };
 
+static const char * const immed_result_valid[] = {
+       [0] = "No immediate response is available",
+       [1] = "Immediate response is available",
+};
+
+static const char * const immed_cmd_busy[] = {
+       [0] = "Can accept an immediate command",
+       [1] = "Immediate command is available",
+};
+
 static void do_self_tests(void)
 {
        if (BIT(1, 0) != 1)
@@ -1552,6 +1562,11 @@ static void dump_cpt(void)
 #define AUD_PIN_ELD_CP_VLD     0x650C0
 #define AUD_HDMI_FIFO_STATUS   0x650D4
 
+/* Audio debug registers */
+#define AUD_ICOI               0x65f00
+#define AUD_IRII               0x65f04
+#define AUD_ICS                        0x65f08
+
 /* Video DIP Control */
 #define VIDEO_DIP_CTL_A                0x60200
 #define VIDEO_DIP_CTL_B                0x61200
@@ -1972,6 +1987,11 @@ static void dump_hsw_plus(void)
        dump_reg(AUD_PIN_ELD_CP_VLD,    "Audio pin ELD valid and CP ready status");
        dump_reg(AUD_HDMI_FIFO_STATUS,  "Audio HDMI FIFO Status");
 
+       /* Audio debug registers */
+       dump_reg(AUD_ICOI,      "Audio Immediate Command Output Interface");
+       dump_reg(AUD_IRII,      "Audio Immediate Response Input Interface");
+       dump_reg(AUD_ICS,       "Audio Immediate Command Status");
+
        printf("\nDetails:\n\n");
 
        dump_ddi_buf_ctl(PORT_A);
@@ -2033,6 +2053,13 @@ static void dump_hsw_plus(void)
 
        dump_aud_eld_cp_vld();
        dump_hdmi_fifo_status();
+
+    printf("\nDetails:\n\n");
+
+       printf("IRV [%1lx] %s\t", BIT(dword, 1),
+               OPNAME(immed_result_valid, BIT(dword, 1)));
+       printf("ICB [%1lx] %s\n", BIT(dword, 1),
+               OPNAME(immed_cmd_busy, BIT(dword, 0)));
 }
 
 int main(int argc, char **argv)