[PATCH 09/39] drm/imx: dc: ed: Rework dc_ed_pec_src_sel() to drop ARRAY_SIZE() use

[Marek Vasut]

Rework dc_ed_pec_src_sel() to drop ARRAY_SIZE() use and use new sentinel
trailing entry LINK_ID_LAST to stop iterating over src_sels array instead.
This allows passing of this array around as OF match data, which will be
useful when using this pipeline on i.MX95, which has different src_sels
array.

Signed-off-by: Marek Vasut <marek.vasut at mailbox.org>
---
Cc: Abel Vesa <abelvesa at kernel.org>
Cc: Conor Dooley <conor+dt at kernel.org>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Krzysztof Kozlowski <krzk+dt at kernel.org>
Cc: Laurent Pinchart <Laurent.pinchart at ideasonboard.com>
Cc: Liu Ying <victor.liu at nxp.com>
Cc: Lucas Stach <l.stach at pengutronix.de>
Cc: Peng Fan <peng.fan at nxp.com>
Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
Cc: Rob Herring <robh at kernel.org>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: devicetree at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Cc: imx at lists.linux.dev
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-clk at vger.kernel.org
---
 drivers/gpu/drm/imx/dc/dc-ed.c | 7 ++++---
 drivers/gpu/drm/imx/dc/dc-pe.h | 1 +
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/imx/dc/dc-ed.c b/drivers/gpu/drm/imx/dc/dc-ed.c
index 9a141c6aa0812..2fdd22a903dec 100644
--- a/drivers/gpu/drm/imx/dc/dc-ed.c
+++ b/drivers/gpu/drm/imx/dc/dc-ed.c
@@ -116,6 +116,7 @@ static const enum dc_link_id src_sels[] = {
 	LINK_ID_LAYERBLEND2_MX8QXP,
 	LINK_ID_LAYERBLEND1_MX8QXP,
 	LINK_ID_LAYERBLEND0_MX8QXP,
+	LINK_ID_LAST	/* sentinel */
 };
 
 static inline void dc_ed_pec_enable_shden(struct dc_ed *ed)
@@ -141,10 +142,10 @@ static inline void dc_ed_pec_div_reset(struct dc_ed *ed)
 
 void dc_ed_pec_src_sel(struct dc_ed *ed, enum dc_link_id src)
 {
-	int i;
+	int i = 0;
 
-	for (i = 0; i < ARRAY_SIZE(src_sels); i++) {
-		if (src_sels[i] == src) {
+	while (src_sels[i] != LINK_ID_LAST) {
+		if (src_sels[i++] == src) {
 			regmap_write(ed->reg_pec, PIXENGCFG_DYNAMIC, src);
 			return;
 		}
diff --git a/drivers/gpu/drm/imx/dc/dc-pe.h b/drivers/gpu/drm/imx/dc/dc-pe.h
index 866859403a79d..1e1e04cc39d4b 100644
--- a/drivers/gpu/drm/imx/dc/dc-pe.h
+++ b/drivers/gpu/drm/imx/dc/dc-pe.h
@@ -33,6 +33,7 @@ enum dc_link_id {
 	LINK_ID_LAYERBLEND1_MX8QXP	= 0x22,
 	LINK_ID_LAYERBLEND2_MX8QXP	= 0x23,
 	LINK_ID_LAYERBLEND3_MX8QXP	= 0x24,
+	LINK_ID_LAST			= 0xffffffff, /* sentinel */
 };
 
 enum dc_lb_mode {
-- 
2.51.0