drm/amd/display: Add query_ddc_data function

Signed-off-by: Zeyu Fan <Zeyu.Fan@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 35 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 84412e752017..6516c275e0c7 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1725,6 +1725,31 @@ bool dc_read_dpcd(
         return r == DDC_RESULT_SUCESSFULL;
 }
 
+bool dc_query_ddc_data(
+                struct dc *dc,
+                uint32_t link_index,
+                uint32_t address,
+                uint8_t *write_buf,
+                uint32_t write_size,
+                uint8_t *read_buf,
+                uint32_t read_size) {
+
+        struct core_dc *core_dc = DC_TO_CORE(dc);
+
+        struct core_link *link = core_dc->links[link_index];
+
+        bool result = dal_ddc_service_query_ddc_data(
+                        link->ddc,
+                        address,
+                        write_buf,
+                        write_size,
+                        read_buf,
+                        read_size);
+
+        return result;
+}
+
+
 bool dc_write_dpcd(
                 struct dc *dc,
                 uint32_t link_index,
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 71d7dde79ae0..2d84b18f48b0 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -720,7 +720,16 @@ bool dc_write_dpcd(
                 uint32_t link_index,
                 uint32_t address,
                 const uint8_t *data,
-        uint32_t size);
+                uint32_t size);
+
+bool dc_query_ddc_data(
+                struct dc *dc,
+                uint32_t link_index,
+                uint32_t address,
+                uint8_t *write_buf,
+                uint32_t write_size,
+                uint8_t *read_buf,
+                uint32_t read_size);
 
 bool dc_submit_i2c(
                 struct dc *dc,