[PATCH 17/18] drm/amd/display: cache trace buffer size

[Tom Chung]

From: Josip Pavic <josip.pa...@amd.com>

[Why & How]
Cache the trace buffer size retrieved from DMUB FW in the driver

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>
Reviewed-by: Aric Cyr <aric....@amd.com>
Acked-by: Tom Chung <chiahsuan.ch...@amd.com>
Signed-off-by: Josip Pavic <josip.pa...@amd.com>
---
 drivers/gpu/drm/amd/display/dmub/dmub_srv.h     | 1 +
 drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h 
b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h
index 7c9a2b34bd05..e210cb082ebd 100644
--- a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h
+++ b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h
@@ -428,6 +428,7 @@ struct dmub_srv {
        enum dmub_asic asic;
        void *user_ctx;
        uint32_t fw_version;
+       uint32_t trace_buffer_size;
        bool is_virtual;
        struct dmub_fb scratch_mem_fb;
        volatile const struct dmub_fw_state *fw_state;
diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c 
b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
index 9e9a6a44a7ac..8b9af18e84fe 100644
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_srv.c
@@ -427,6 +427,8 @@ dmub_srv_calc_region_info(struct dmub_srv *dmub,
                        dmub->fw_version = fw_info->fw_version;
        }
 
+       dmub->trace_buffer_size = trace_buffer_size;
+
        trace_buff->base = dmub_align(mail->top, 256);
        trace_buff->top = trace_buff->base + dmub_align(trace_buffer_size, 64);
 
-- 
2.25.1