drm/msm/dpu: make fix_core_ab_vote consistent with fix_core_ib_vote

The fix_core_ab_vote is an average bandwidth value, used for bandwidth
overrides in several cases. However there is an internal inconsistency:
fix_core_ib_vote is defined in KBps, while fix_core_ab_vote is defined
in Bps.

Fix that by changing the type of the variable to u32 and using * 1000ULL
multiplier when setting up the dpu_core_perf_params::bw_ctl value.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/636064/
Link: https://lore.kernel.org/r/20250209-dpu-perf-rework-v5-4-87e936cf3004@linaro.org

Author: lumag

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

@@ -125,7 +125,7 @@ static void _dpu_core_perf_calc_crtc(const struct dpu_core_perf *core_perf,
 		perf->max_per_pipe_ib = 0;
 		perf->core_clk_rate = 0;
 	} else if (core_perf->perf_tune.mode == DPU_PERF_MODE_FIXED) {
-		perf->bw_ctl = core_perf->fix_core_ab_vote;
+		perf->bw_ctl = core_perf->fix_core_ab_vote * 1000ULL;
 		perf->max_per_pipe_ib = core_perf->fix_core_ib_vote;
 		perf->core_clk_rate = core_perf->fix_core_clk_rate;
 	} else {
@@ -479,7 +479,7 @@ int dpu_core_perf_debugfs_init(struct dpu_kms *dpu_kms, struct dentry *parent)
 			&perf->fix_core_clk_rate);
 	debugfs_create_u32("fix_core_ib_vote", 0600, entry,
 			&perf->fix_core_ib_vote);
-	debugfs_create_u64("fix_core_ab_vote", 0600, entry,
+	debugfs_create_u32("fix_core_ab_vote", 0600, entry,
 			&perf->fix_core_ab_vote);
 
 	return 0;

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

@@ -41,7 +41,7 @@ struct dpu_core_perf_tune {
  * @enable_bw_release: debug control for bandwidth release
  * @fix_core_clk_rate: fixed core clock request in Hz used in mode 2
  * @fix_core_ib_vote: fixed core ib vote in KBps used in mode 2
- * @fix_core_ab_vote: fixed core ab vote in bps used in mode 2
+ * @fix_core_ab_vote: fixed core ab vote in KBps used in mode 2
  */
 struct dpu_core_perf {
 	const struct dpu_perf_cfg *perf_cfg;
@@ -51,7 +51,7 @@ struct dpu_core_perf {
 	u32 enable_bw_release;
 	u64 fix_core_clk_rate;
 	u32 fix_core_ib_vote;
-	u64 fix_core_ab_vote;
+	u32 fix_core_ab_vote;
 };
 
 int dpu_core_perf_crtc_check(struct drm_crtc *crtc,