drm/imagination: Add firmware trace to debugfs

Firmware trace is exposed at /sys/debug/dri/<dev_nr>/pvr_fw/trace_0.
Trace is enabled via the group mask at
/sys/debug/dri/<dev_nr>/pvr_params/fw_trace_mask.

Changes since v8:
- Corrected license identifiers

Changes since v3:
- Use drm_dev_{enter,exit}

Co-developed-by: Matt Coster <matt.coster@imgtec.com>
Signed-off-by: Matt Coster <matt.coster@imgtec.com>
Signed-off-by: Sarah Walker <sarah.walker@imgtec.com>
Signed-off-by: Donald Robson <donald.robson@imgtec.com>
Link: https://lore.kernel.org/r/009cf9fee347fa96c8a665dc368fc54a5ffceff0.1700668843.git.donald.robson@imgtec.com
Signed-off-by: Maxime Ripard <mripard@kernel.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/drivers/gpu/drm/imagination/pvr_device.h b/drivers/gpu/drm/imagination/pvr_device.h
index b6e9a7e8072e..e07655fc65e8 100644
--- a/drivers/gpu/drm/imagination/pvr_device.h
+++ b/drivers/gpu/drm/imagination/pvr_device.h
@@ -7,6 +7,7 @@
 #include "pvr_ccb.h"
 #include "pvr_device_info.h"
 #include "pvr_fw.h"
+#include "pvr_params.h"
 #include "pvr_rogue_fwif_stream.h"
 #include "pvr_stream.h"
 
@@ -148,6 +149,15 @@ struct pvr_device {
 	/** @fw_dev: Firmware related data. */
 	struct pvr_fw_device fw_dev;
 
+	/**
+	 * @params: Device-specific parameters.
+	 *
+	 *          The values of these parameters are initialized from the
+	 *          defaults specified as module parameters. They may be
+	 *          modified at runtime via debugfs (if enabled).
+	 */
+	struct pvr_device_params params;
+
 	/** @stream_musthave_quirks: Bit array of "must-have" quirks for stream commands. */
 	u32 stream_musthave_quirks[PVR_STREAM_TYPE_MAX][PVR_STREAM_EXTHDR_TYPE_MAX];