drm/msm/dpu: update the qos remap only if the client type changes

Update the qos remap only if the client type changes for the plane.
This will avoid unnecessary register programming and also avoid log
spam from the dpu_vbif_set_qos_remap() function.

changes in v2:
 - get rid of the dirty flag and simplify the logic to call
   _dpu_plane_set_qos_remap()
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c

@@ -954,6 +954,7 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 {
 	int ret = 0, min_scale;
 	struct dpu_plane *pdpu = to_dpu_plane(plane);
+	struct dpu_plane_state *pstate = to_dpu_plane_state(state);
 	const struct drm_crtc_state *crtc_state = NULL;
 	const struct dpu_format *fmt;
 	struct drm_rect src, dst, fb_rect = { 0 };
@@ -1026,6 +1027,8 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 		return -E2BIG;
 	}
 
+	pstate->needs_qos_remap = drm_atomic_crtc_needs_modeset(crtc_state);
+
 	return 0;
 }
 
@@ -1084,6 +1087,7 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
 	struct dpu_plane_state *pstate = to_dpu_plane_state(state);
 	struct drm_crtc *crtc = state->crtc;
 	struct drm_framebuffer *fb = state->fb;
+	bool is_rt_pipe, update_qos_remap;
 	const struct dpu_format *fmt =
 		to_dpu_format(msm_framebuffer_format(fb));
 
@@ -1093,7 +1097,7 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
 
 	pstate->pending = true;
 
-	pdpu->is_rt_pipe = (dpu_crtc_get_client_type(crtc) != NRT_CLIENT);
+	is_rt_pipe = (dpu_crtc_get_client_type(crtc) != NRT_CLIENT);
 	_dpu_plane_set_qos_ctrl(plane, false, DPU_PLANE_QOS_PANIC_CTRL);
 
 	DPU_DEBUG_PLANE(pdpu, "FB[%u] " DRM_RECT_FP_FMT "->crtc%u " DRM_RECT_FMT
@@ -1199,7 +1203,16 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
 		_dpu_plane_set_ot_limit(plane, crtc);
 	}
 
-	_dpu_plane_set_qos_remap(plane);
+	update_qos_remap = (is_rt_pipe != pdpu->is_rt_pipe) ||
+			pstate->needs_qos_remap;
+
+	if (update_qos_remap) {
+		if (is_rt_pipe != pdpu->is_rt_pipe)
+			pdpu->is_rt_pipe = is_rt_pipe;
+		else if (pstate->needs_qos_remap)
+			pstate->needs_qos_remap = false;
+		_dpu_plane_set_qos_remap(plane);
+	}
 
 	_dpu_plane_calc_bw(plane, fb);
 

drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h

@@ -19,6 +19,7 @@
  * @base:	base drm plane state object
  * @aspace:	pointer to address space for input/output buffers
  * @stage:	assigned by crtc blender
+ * @needs_qos_remap: qos remap settings need to be updated
  * @multirect_index: index of the rectangle of SSPP
  * @multirect_mode: parallel or time multiplex multirect mode
  * @pending:	whether the current update is still pending
@@ -32,6 +33,7 @@ struct dpu_plane_state {
 	struct drm_plane_state base;
 	struct msm_gem_address_space *aspace;
 	enum dpu_stage stage;
+	bool needs_qos_remap;
 	uint32_t multirect_index;
 	uint32_t multirect_mode;
 	bool pending;