[PATCH 15/28] drm/i915/writeback: Define compute_config for writeback

[Suraj Kandpal]

Define the compute config function where we assign the output_type
and add the transcoder that needs to be used. We currently assign
one WD0 transcoder.

Signed-off-by: Suraj Kandpal <suraj.kand...@intel.com>
---
 .../gpu/drm/i915/display/intel_writeback.c    | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_writeback.c 
b/drivers/gpu/drm/i915/display/intel_writeback.c
index f1570a638422..3ea09587c4c2 100644
--- a/drivers/gpu/drm/i915/display/intel_writeback.c
+++ b/drivers/gpu/drm/i915/display/intel_writeback.c
@@ -214,6 +214,25 @@ static const struct drm_writeback_connector_helper_funcs 
writeback_conn_helper_f
        .get_connector_from_writeback = intel_get_connector_from_writeback,
 };
 
+static int
+intel_writeback_compute_config(struct intel_encoder *encoder,
+                              struct intel_crtc_state *pipe_config,
+                              struct drm_connector_state *conn_state)
+{
+       struct intel_display *display = to_intel_display(encoder);
+
+       if (!conn_state->writeback_job)
+               return 0;
+
+       if (HAS_TRANSCODER(display, TRANSCODER_WD_0))
+               pipe_config->cpu_transcoder = TRANSCODER_WD_0;
+
+       pipe_config->output_types |= BIT(INTEL_OUTPUT_WRITEBACK);
+       pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB;
+
+       return 0;
+}
+
 static void
 intel_writeback_get_config(struct intel_encoder *encoder,
                           struct intel_crtc_state *crtc_state)
@@ -294,6 +313,7 @@ int intel_writeback_init(struct intel_display *display)
        encoder->cloneable = 0;
        encoder->get_config = intel_writeback_get_config;
        encoder->get_hw_state = intel_writeback_get_hw_state;
+       encoder->compute_config = intel_writeback_compute_config;
 
        connector = &writeback_conn->connector;
        intel_writeback_connector_alloc(connector);
-- 
2.34.1