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From:   Stu Hsieh <stu.hsieh@mediatek.com>
To:     CK Hu <ck.hu@mediatek.com>, Philipp Zabel <p.zabel@pengutronix.de>
CC:     David Airlie <airlied@linux.ie>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        <dri-devel@lists.freedesktop.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-mediatek@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <srv_heupstream@mediatek.com>,
        Stu Hsieh <stu.hsieh@mediatek.com>
Subject: [PATCH v1 12/15] drm/mediatek: add layer number condition for RDMA to control plane
Date:   Tue, 24 Jul 2018 16:17:12 +0800
Message-ID: <1532420235-22268-13-git-send-email-stu.hsieh@mediatek.com>
In-Reply-To: <1532420235-22268-1-git-send-email-stu.hsieh@mediatek.com>
References: <1532420235-22268-1-git-send-email-stu.hsieh@mediatek.com>
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Sender: linux-kernel-owner@vger.kernel.org
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This patch add layer number condition for RDMA to control plane

When plane init in crtc create,
it use the number of OVL layer to init plane.
That's OVL can read 4 memory address.

For mt2712 third ddp, it use RDMA to read memory.
RDMA can read 1 memory address, so it just init one plane.

For compatibility, this patch use two define OVL_LAYER_NR and
RDMA_LAYER_NR to distingush two difference HW engine.

Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 25 +++++++++++++++++--------
 drivers/gpu/drm/mediatek/mtk_drm_crtc.h |  2 ++
 2 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 4bf636e466f2..8ad90c62caa6 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -45,7 +45,8 @@ struct mtk_drm_crtc {
 	bool				pending_needs_vblank;
 	struct drm_pending_vblank_event	*event;
 
-	struct drm_plane		planes[OVL_LAYER_NR];
+	struct drm_plane		planes[MAX_LAYER_NR];
+	unsigned int			layer_nr;
 	bool				pending_planes;
 
 	void __iomem			*config_regs;
@@ -286,7 +287,7 @@ static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
 	}
 
 	/* Initially configure all planes */
-	for (i = 0; i < OVL_LAYER_NR; i++) {
+	for (i = 0; i < mtk_crtc->layer_nr; i++) {
 		struct drm_plane *plane = &mtk_crtc->planes[i];
 		struct mtk_plane_state *plane_state;
 
@@ -351,7 +352,7 @@ static void mtk_crtc_ddp_config(struct drm_crtc *crtc)
 	}
 
 	if (mtk_crtc->pending_planes) {
-		for (i = 0; i < OVL_LAYER_NR; i++) {
+		for (i = 0; i < mtk_crtc->layer_nr; i++) {
 			struct drm_plane *plane = &mtk_crtc->planes[i];
 			struct mtk_plane_state *plane_state;
 
@@ -403,7 +404,7 @@ static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
 		return;
 
 	/* Set all pending plane state to disabled */
-	for (i = 0; i < OVL_LAYER_NR; i++) {
+	for (i = 0; i < mtk_crtc->layer_nr; i++) {
 		struct drm_plane *plane = &mtk_crtc->planes[i];
 		struct mtk_plane_state *plane_state;
 
@@ -450,7 +451,7 @@ static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
 
 	if (mtk_crtc->event)
 		mtk_crtc->pending_needs_vblank = true;
-	for (i = 0; i < OVL_LAYER_NR; i++) {
+	for (i = 0; i < mtk_crtc->layer_nr; i++) {
 		struct drm_plane *plane = &mtk_crtc->planes[i];
 		struct mtk_plane_state *plane_state;
 
@@ -559,6 +560,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 	if (!mtk_crtc)
 		return -ENOMEM;
 
+	mtk_crtc->layer_nr = OVL_LAYER_NR;
 	mtk_crtc->config_regs = priv->config_regs;
 	mtk_crtc->ddp_comp_nr = path_len;
 	mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->ddp_comp_nr,
@@ -601,12 +603,13 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 			       comp_id == DDP_COMPONENT_RDMA2)) {
 			rdma_memory_mode = comp->comp_mode;
 			*rdma_memory_mode = true;
+			mtk_crtc->layer_nr = RDMA_LAYER_NR;
 		}
 
 		mtk_crtc->ddp_comp[i] = comp;
 	}
 
-	for (zpos = 0; zpos < OVL_LAYER_NR; zpos++) {
+	for (zpos = 0; zpos < mtk_crtc->layer_nr; zpos++) {
 		type = (zpos == 0) ? DRM_PLANE_TYPE_PRIMARY :
 				(zpos == 1) ? DRM_PLANE_TYPE_CURSOR :
 						DRM_PLANE_TYPE_OVERLAY;
@@ -616,8 +619,14 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 			goto unprepare;
 	}
 
-	ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0],
-				&mtk_crtc->planes[1], pipe);
+	if (mtk_crtc->layer_nr == 1) {
+		ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0],
+					NULL, pipe);
+	} else {
+		ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0],
+					&mtk_crtc->planes[1], pipe);
+	}
+
 	if (ret < 0)
 		goto unprepare;
 	drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
index 9d9410c67ae9..b44fefadf14a 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
@@ -18,7 +18,9 @@
 #include "mtk_drm_ddp_comp.h"
 #include "mtk_drm_plane.h"
 
+#define MAX_LAYER_NR	4
 #define OVL_LAYER_NR	4
+#define RDMA_LAYER_NR	1
 #define MTK_LUT_SIZE	512
 #define MTK_MAX_BPC	10
 #define MTK_MIN_BPC	3
-- 
2.12.5