drm/msm/dpu: Pass catalog pointers in RM to replace for-loop ID lookups

The Resource Manager already iterates over all available blocks from the
catalog, only to pass their ID to a dpu_hw_xxx_init() function which
uses an _xxx_offset() helper to search for and find the exact same
catalog pointer again to initialize the block with, fallible error
handling and all.

Instead, pass const pointers to the catalog entries directly to these
_init functions and drop the for loops entirely, saving on both
readability complexity and unnecessary cycles at boot.

Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/533861/
Link: https://lore.kernel.org/r/20230418-dpu-drop-useless-for-lookup-v3-3-e8d869eea455@somainline.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

1 files changed, 10 insertions, 30 deletions

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index ac9cc916eabc..f0271283a3a7 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -68,25 +68,6 @@
 #define INTF_MISR_CTRL			0x180
 #define INTF_MISR_SIGNATURE		0x184
 
-static const struct dpu_intf_cfg *_intf_offset(enum dpu_intf intf,
-		const struct dpu_mdss_cfg *m,
-		void __iomem *addr,
-		struct dpu_hw_blk_reg_map *b)
-{
-	int i;
-
-	for (i = 0; i < m->intf_count; i++) {
-		if ((intf == m->intf[i].id) &&
-		(m->intf[i].type != INTF_NONE)) {
-			b->blk_addr = addr + m->intf[i].base;
-			b->log_mask = DPU_DBG_MASK_INTF;
-			return &m->intf[i];
-		}
-	}
-
-	return ERR_PTR(-EINVAL);
-}
-
 static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
 		const struct intf_timing_params *p,
 		const struct dpu_format *fmt)
@@ -336,28 +317,27 @@ static void _setup_intf_ops(struct dpu_hw_intf_ops *ops,
 	ops->collect_misr = dpu_hw_intf_collect_misr;
 }
 
-struct dpu_hw_intf *dpu_hw_intf_init(enum dpu_intf idx,
-		void __iomem *addr,
-		const struct dpu_mdss_cfg *m)
+struct dpu_hw_intf *dpu_hw_intf_init(const struct dpu_intf_cfg *cfg,
+		void __iomem *addr)
 {
 	struct dpu_hw_intf *c;
-	const struct dpu_intf_cfg *cfg;
+
+	if (cfg->type == INTF_NONE) {
+		DPU_DEBUG("Skip intf %d with type NONE\n", cfg->id - INTF_0);
+		return NULL;
+	}
 
 	c = kzalloc(sizeof(*c), GFP_KERNEL);
 	if (!c)
 		return ERR_PTR(-ENOMEM);
 
-	cfg = _intf_offset(idx, m, addr, &c->hw);
-	if (IS_ERR_OR_NULL(cfg)) {
-		kfree(c);
-		pr_err("failed to create dpu_hw_intf %d\n", idx);
-		return ERR_PTR(-EINVAL);
-	}
+	c->hw.blk_addr = addr + cfg->base;
+	c->hw.log_mask = DPU_DBG_MASK_INTF;
 
 	/*
 	 * Assign ops
 	 */
-	c->idx = idx;
+	c->idx = cfg->id;
 	c->cap = cfg;
 	_setup_intf_ops(&c->ops, c->cap->features);