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From:   Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
To:     Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        David Airlie <airlied@linux.ie>
Cc:     dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Subject: [PATCH 2/2] drm: rcar-du: Add interlaced feature flag
Date:   Mon, 20 Aug 2018 17:00:44 +0100
Message-Id: <20180820160044.15783-3-kieran.bingham+renesas@ideasonboard.com>
In-Reply-To: <20180820160044.15783-1-kieran.bingham+renesas@ideasonboard.com>
References: <20180820160044.15783-1-kieran.bingham+renesas@ideasonboard.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Upcoming implementations of the R-Car DU have removed support for
interlaced display pipelines. Provide a means to determine this based on
the feature flags of the hardware configuration structs.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

---

This could be a feature to designate that there is no interlaced
support, which would then negate the need to add extra feature flags to
the existing targets... But that's a 'non-feature' rather than a
'feature', so this way at least reads better.

Tested on Salvator-XS (H3) by removing the flag and verifying interlaced
modes are rejected.

 drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 14 +++++++++++
 drivers/gpu/drm/rcar-du/rcar_du_drv.c  | 32 +++++++++++++++++---------
 drivers/gpu/drm/rcar-du/rcar_du_drv.h  |  1 +
 3 files changed, 36 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 15dc9caa128b..4b43d8329695 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -684,11 +684,25 @@ static void rcar_du_crtc_atomic_flush(struct drm_crtc *crtc,
 		rcar_du_vsp_atomic_flush(rcrtc);
 }
 
+enum drm_mode_status rcar_du_crtc_mode_valid(struct drm_crtc *crtc,
+				   const struct drm_display_mode *mode)
+{
+	struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+	struct rcar_du_device *rcdu = rcrtc->group->dev;
+	bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
+
+	if (interlaced && !rcar_du_has(rcdu, RCAR_DU_FEATURE_INTERLACED))
+		return MODE_NO_INTERLACE;
+
+	return MODE_OK;
+}
+
 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
 	.atomic_begin = rcar_du_crtc_atomic_begin,
 	.atomic_flush = rcar_du_crtc_atomic_flush,
 	.atomic_enable = rcar_du_crtc_atomic_enable,
 	.atomic_disable = rcar_du_crtc_atomic_disable,
+	.mode_valid = rcar_du_crtc_mode_valid,
 };
 
 static struct drm_crtc_state *
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.c b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
index 02aee6cb0e53..49f2ae80d0f5 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.c
@@ -39,7 +39,8 @@
 static const struct rcar_du_device_info rzg1_du_r8a7743_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
-		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
+		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(1) | BIT(0),
 	.routes = {
 		/*
@@ -60,7 +61,8 @@ static const struct rcar_du_device_info rzg1_du_r8a7743_info = {
 static const struct rcar_du_device_info rzg1_du_r8a7745_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
-		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
+		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(1) | BIT(0),
 	.routes = {
 		/*
@@ -79,7 +81,7 @@ static const struct rcar_du_device_info rzg1_du_r8a7745_info = {
 
 static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 	.gen = 2,
-	.features = 0,
+	.features = RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(1) | BIT(0),
 	.routes = {
 		/*
@@ -100,7 +102,8 @@ static const struct rcar_du_device_info rcar_du_r8a7779_info = {
 static const struct rcar_du_device_info rcar_du_r8a7790_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
-		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
+		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.quirks = RCAR_DU_QUIRK_ALIGN_128B,
 	.channels_mask = BIT(2) | BIT(1) | BIT(0),
 	.routes = {
@@ -128,7 +131,8 @@ static const struct rcar_du_device_info rcar_du_r8a7790_info = {
 static const struct rcar_du_device_info rcar_du_r8a7791_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
-		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
+		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(1) | BIT(0),
 	.routes = {
 		/*
@@ -150,7 +154,8 @@ static const struct rcar_du_device_info rcar_du_r8a7791_info = {
 static const struct rcar_du_device_info rcar_du_r8a7792_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
-		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
+		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(1) | BIT(0),
 	.routes = {
 		/* R8A7792 has two RGB outputs. */
@@ -168,7 +173,8 @@ static const struct rcar_du_device_info rcar_du_r8a7792_info = {
 static const struct rcar_du_device_info rcar_du_r8a7794_info = {
 	.gen = 2,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
-		  | RCAR_DU_FEATURE_EXT_CTRL_REGS,
+		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(1) | BIT(0),
 	.routes = {
 		/*
@@ -190,7 +196,8 @@ static const struct rcar_du_device_info rcar_du_r8a7795_info = {
 	.gen = 3,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
-		  | RCAR_DU_FEATURE_VSP1_SOURCE,
+		  | RCAR_DU_FEATURE_VSP1_SOURCE
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(3) | BIT(2) | BIT(1) | BIT(0),
 	.routes = {
 		/*
@@ -222,7 +229,8 @@ static const struct rcar_du_device_info rcar_du_r8a7796_info = {
 	.gen = 3,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
-		  | RCAR_DU_FEATURE_VSP1_SOURCE,
+		  | RCAR_DU_FEATURE_VSP1_SOURCE
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(2) | BIT(1) | BIT(0),
 	.routes = {
 		/*
@@ -250,7 +258,8 @@ static const struct rcar_du_device_info rcar_du_r8a77965_info = {
 	.gen = 3,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
-		  | RCAR_DU_FEATURE_VSP1_SOURCE,
+		  | RCAR_DU_FEATURE_VSP1_SOURCE
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(3) | BIT(1) | BIT(0),
 	.routes = {
 		/*
@@ -278,7 +287,8 @@ static const struct rcar_du_device_info rcar_du_r8a77970_info = {
 	.gen = 3,
 	.features = RCAR_DU_FEATURE_CRTC_IRQ_CLOCK
 		  | RCAR_DU_FEATURE_EXT_CTRL_REGS
-		  | RCAR_DU_FEATURE_VSP1_SOURCE,
+		  | RCAR_DU_FEATURE_VSP1_SOURCE
+		  | RCAR_DU_FEATURE_INTERLACED,
 	.channels_mask = BIT(0),
 	.routes = {
 		/* R8A77970 has one RGB output and one LVDS output. */
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_drv.h b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
index 78ea20abfb30..c4a66130a603 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_drv.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_drv.h
@@ -30,6 +30,7 @@ struct rcar_du_device;
 #define RCAR_DU_FEATURE_CRTC_IRQ_CLOCK	BIT(0)	/* Per-CRTC IRQ and clock */
 #define RCAR_DU_FEATURE_EXT_CTRL_REGS	BIT(1)	/* Has extended control registers */
 #define RCAR_DU_FEATURE_VSP1_SOURCE	BIT(2)	/* Has inputs from VSP1 */
+#define RCAR_DU_FEATURE_INTERLACED	BIT(3)	/* HW supports interlaced */
 
 #define RCAR_DU_QUIRK_ALIGN_128B	BIT(0)	/* Align pitches to 128 bytes */
 
-- 
2.17.1