We would be using almost same code to loop through bpps while calling
drm_dp_atomic_find_vcpi_slots - lets remove this duplication by
introducing a new function intel_dp_mst_find_vcpi_slots_for_bpp
v2: Fix pbn_div calculation - shouldn't matter if its DSC or not.
v3: FIx rebase conflict, constant_n no longer needed.
Reviewed-by: Vinod Govindapillai <vinod.govindapillai@xxxxxxxxx>
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp_mst.c | 48 +++++++++++++++------
1 file changed, 36 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 421bbcaed664..bdbb599cd48b 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -44,10 +44,14 @@
#include "intel_hotplug.h"
#include "skl_scaler.h"
-static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
- struct intel_crtc_state *crtc_state,
- struct drm_connector_state *conn_state,
- struct link_config_limits *limits)
+static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder,
+ struct intel_crtc_state *crtc_state,
+ int max_bpp,
+ int min_bpp,
+ struct link_config_limits *limits,
+ struct drm_connector_state *conn_state,
+ int step,
+ bool dsc)
{
struct drm_atomic_state *state = crtc_state->uapi.state;
struct intel_dp_mst_encoder *intel_mst = enc_to_mst(encoder);
@@ -71,18 +75,20 @@ static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
// TODO: Handle pbn_div changes by adding a new MST helper
if (!mst_state->pbn_div) {
mst_state->pbn_div = drm_dp_get_vc_payload_bw(&intel_dp->mst_mgr,
- limits->max_rate,
- limits->max_lane_count);
+ crtc_state->port_clock,
+ crtc_state->lane_count);
}
- for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
+ for (bpp = max_bpp; bpp >= min_bpp; bpp -= step) {
crtc_state->pipe_bpp = bpp;
crtc_state->pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock,
- crtc_state->pipe_bpp,
- false);
+ dsc ? bpp << 4 : crtc_state->pipe_bpp,
+ dsc);
+
slots = drm_dp_atomic_find_time_slots(state, &intel_dp->mst_mgr,
- connector->port, crtc_state->pbn);
+ connector->port,
+ crtc_state->pbn);
if (slots == -EDEADLK)
return slots;
if (slots >= 0) {
@@ -100,11 +106,29 @@ static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
if (ret && slots >= 0)
slots = ret;
- if (slots < 0) {
+ if (slots < 0)
drm_dbg_kms(&i915->drm, "failed finding vcpi slots:%d\n",
slots);
+
+ return slots;
+}
+
+
+static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder,
+ struct intel_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ struct link_config_limits *limits)
+{
+ const struct drm_display_mode *adjusted_mode =
+ &crtc_state->hw.adjusted_mode;
+ int slots = -EINVAL;
+
+ slots = intel_dp_mst_find_vcpi_slots_for_bpp(encoder, crtc_state, limits->max_bpp,
+ limits->min_bpp, limits,
+ conn_state, 2 * 3, false);
+
+ if (slots < 0)
return slots;
- }
intel_link_compute_m_n(crtc_state->pipe_bpp,
crtc_state->lane_count,
--
2.37.3
