linux-kernel - [PATCH v2 13/14] drm/tidss: dispc: Switch OVR_REG_FLD

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Message-Id: <20250820-drm-tidss-field-api-v2-13-43cab671c648@kernel.org>
Date: Wed, 20 Aug 2025 16:01:53 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Jyri Sarha <jyri.sarha@....fi>, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Maxime Ripard <mripard@...nel.org>
Subject: [PATCH v2 13/14] drm/tidss: dispc: Switch OVR_REG_FLD_MOD to using
 a mask

The OVR_REG_FLD_MOD function takes the start and end bits as parameter
and will generate a mask out of them.

This makes it difficult to share the masks between callers, since we now
need two arguments and to keep them consistent.

Let's change OVR_REG_FLD_MOD to take the mask as an argument instead,
and let the caller create the mask. Eventually, this mask will be moved
to a define.

Signed-off-by: Maxime Ripard <mripard@...nel.org>
---
 drivers/gpu/drm/tidss/tidss_dispc.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
index c5cad1ddcccfbf1d0b6fb53773bb3aff428ef493..99d3a84a5b40e1e791300199d6b3da9a12d11f80 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.c
+++ b/drivers/gpu/drm/tidss/tidss_dispc.c
@@ -645,17 +645,17 @@ void tidss_disable_oldi(struct tidss_device *tidss, u32 hw_videoport)
 		u32 _reg = dispc_vp_read(_dispc, _vp, _idx);		\
 		FIELD_MODIFY((mask), &_reg, (val));			\
 		dispc_vp_write(_dispc, _vp, _idx, _reg);		\
 	})
 
-#define OVR_REG_FLD_MOD(dispc, ovr, idx, val, start, end)		\
+#define OVR_REG_FLD_MOD(dispc, ovr, idx, val, mask)			\
 	({								\
 		struct dispc_device *_dispc = (dispc);			\
 		u32 _ovr = (ovr);					\
 		u32 _idx = (idx);					\
 		u32 _reg = dispc_ovr_read(_dispc, _ovr, _idx);		\
-		FIELD_MODIFY(GENMASK((start), (end)), &_reg, (val));	\
+		FIELD_MODIFY((mask), &_reg, (val));			\
 		dispc_ovr_write(_dispc, _ovr, _idx, _reg);		\
 	})
 
 static dispc_irq_t dispc_vp_irq_from_raw(u32 stat, u32 hw_videoport)
 {
@@ -1483,29 +1483,29 @@ static void dispc_am65x_ovr_set_plane(struct dispc_device *dispc,
 				      u32 x, u32 y, u32 layer)
 {
 	u32 hw_id = dispc->feat->vid_info[hw_plane].hw_id;
 
 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
-			hw_id, 4, 1);
-	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
-			x, 17, 6);
-	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
-			y, 30, 19);
+			hw_id, GENMASK(4, 1));
+	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer), x,
+			GENMASK(17, 6));
+	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer), y,
+			GENMASK(30, 19));
 }
 
 static void dispc_j721e_ovr_set_plane(struct dispc_device *dispc,
 				      u32 hw_plane, u32 hw_videoport,
 				      u32 x, u32 y, u32 layer)
 {
 	u32 hw_id = dispc->feat->vid_info[hw_plane].hw_id;
 
 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
-			hw_id, 4, 1);
-	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES2(layer),
-			x, 13, 0);
-	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES2(layer),
-			y, 29, 16);
+			hw_id, GENMASK(4, 1));
+	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES2(layer), x,
+			GENMASK(13, 0));
+	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES2(layer), y,
+			GENMASK(29, 16));
 }
 
 void dispc_ovr_set_plane(struct dispc_device *dispc, u32 hw_plane,
 			 u32 hw_videoport, u32 x, u32 y, u32 layer)
 {
@@ -1536,11 +1536,11 @@ void dispc_ovr_enable_layer(struct dispc_device *dispc,
 {
 	if (dispc->feat->subrev == DISPC_K2G)
 		return;
 
 	OVR_REG_FLD_MOD(dispc, hw_videoport, DISPC_OVR_ATTRIBUTES(layer),
-			!!enable, 0, 0);
+			!!enable, GENMASK(0, 0));
 }
 
 /* CSC */
 enum csc_ctm {
 	CSC_RR, CSC_RG, CSC_RB,

-- 
2.50.1