[PATCH 2/2] drm/meson: Use optional canvas provider

[Maxime Jourdan <mjourdan@baylibre.com>]

This is the first step into converting the meson/drm driver to use
the canvas module.

If a canvas provider node is detected in DT, use it. Otherwise,
fall back to what is currently being done.

Signed-off-by: Maxime Jourdan <mjourdan@baylibre.com>
---
 drivers/gpu/drm/meson/Kconfig       |  1 +
 drivers/gpu/drm/meson/meson_crtc.c  | 14 ++++++---
 drivers/gpu/drm/meson/meson_drv.c   | 46 ++++++++++++++++++-----------
 drivers/gpu/drm/meson/meson_drv.h   |  4 +++
 drivers/gpu/drm/meson/meson_plane.c |  8 ++++-
 5 files changed, 51 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/meson/Kconfig b/drivers/gpu/drm/meson/Kconfig
index 3ce51d8dfe1c..c28b69f48555 100644
--- a/drivers/gpu/drm/meson/Kconfig
+++ b/drivers/gpu/drm/meson/Kconfig
@@ -7,6 +7,7 @@ config DRM_MESON
 	select DRM_GEM_CMA_HELPER
 	select VIDEOMODE_HELPERS
 	select REGMAP_MMIO
+	select MESON_CANVAS
 
 config DRM_MESON_DW_HDMI
 	tristate "HDMI Synopsys Controller support for Amlogic Meson Display"
diff --git a/drivers/gpu/drm/meson/meson_crtc.c b/drivers/gpu/drm/meson/meson_crtc.c
index 05520202c967..b3bc0b0ee07f 100644
--- a/drivers/gpu/drm/meson/meson_crtc.c
+++ b/drivers/gpu/drm/meson/meson_crtc.c
@@ -193,10 +193,16 @@ void meson_crtc_irq(struct meson_drm *priv)
 		} else
 			meson_vpp_disable_interlace_vscaler_osd1(priv);
 
-		meson_canvas_setup(priv, MESON_CANVAS_ID_OSD1,
-			   priv->viu.osd1_addr, priv->viu.osd1_stride,
-			   priv->viu.osd1_height, MESON_CANVAS_WRAP_NONE,
-			   MESON_CANVAS_BLKMODE_LINEAR);
+		if (priv->canvas)
+			meson_canvas_config(priv->canvas, priv->canvas_id_osd1,
+				priv->viu.osd1_addr, priv->viu.osd1_stride,
+				priv->viu.osd1_height, MESON_CANVAS_WRAP_NONE,
+				MESON_CANVAS_BLKMODE_LINEAR, 0);
+		else
+			meson_canvas_setup(priv, MESON_CANVAS_ID_OSD1,
+				priv->viu.osd1_addr, priv->viu.osd1_stride,
+				priv->viu.osd1_height, MESON_CANVAS_WRAP_NONE,
+				MESON_CANVAS_BLKMODE_LINEAR);
 
 		/* Enable OSD1 */
 		writel_bits_relaxed(VPP_OSD1_POSTBLEND, VPP_OSD1_POSTBLEND,
diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c
index d3443125e661..b39c38c2350d 100644
--- a/drivers/gpu/drm/meson/meson_drv.c
+++ b/drivers/gpu/drm/meson/meson_drv.c
@@ -216,24 +216,33 @@ static int meson_drv_bind_master(struct device *dev, bool has_components)
 		goto free_drm;
 	}
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
-	if (!res) {
-		ret = -EINVAL;
-		goto free_drm;
-	}
-	/* Simply ioremap since it may be a shared register zone */
-	regs = devm_ioremap(dev, res->start, resource_size(res));
-	if (!regs) {
-		ret = -EADDRNOTAVAIL;
-		goto free_drm;
-	}
+	priv->canvas = meson_canvas_get(dev);
+	if (!IS_ERR(priv->canvas)) {
+		ret = meson_canvas_alloc(priv->canvas, &priv->canvas_id_osd1);
+		if (ret)
+			goto free_drm;
+	} else {
+		priv->canvas = NULL;
 
-	priv->dmc = devm_regmap_init_mmio(dev, regs,
-					  &meson_regmap_config);
-	if (IS_ERR(priv->dmc)) {
-		dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
-		ret = PTR_ERR(priv->dmc);
-		goto free_drm;
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
+		if (!res) {
+			ret = -EINVAL;
+			goto free_drm;
+		}
+		/* Simply ioremap since it may be a shared register zone */
+		regs = devm_ioremap(dev, res->start, resource_size(res));
+		if (!regs) {
+			ret = -EADDRNOTAVAIL;
+			goto free_drm;
+		}
+
+		priv->dmc = devm_regmap_init_mmio(dev, regs,
+						  &meson_regmap_config);
+		if (IS_ERR(priv->dmc)) {
+			dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
+			ret = PTR_ERR(priv->dmc);
+			goto free_drm;
+		}
 	}
 
 	priv->vsync_irq = platform_get_irq(pdev, 0);
@@ -315,6 +324,9 @@ static void meson_drv_unbind(struct device *dev)
 	struct drm_device *drm = dev_get_drvdata(dev);
 	struct meson_drm *priv = drm->dev_private;
 
+	if (priv->canvas)
+		meson_canvas_free(priv->canvas, priv->canvas_id_osd1);
+
 	drm_dev_unregister(drm);
 	drm_kms_helper_poll_fini(drm);
 	drm_fbdev_cma_fini(priv->fbdev);
diff --git a/drivers/gpu/drm/meson/meson_drv.h b/drivers/gpu/drm/meson/meson_drv.h
index 8450d6ac8c9b..728d0ca33732 100644
--- a/drivers/gpu/drm/meson/meson_drv.h
+++ b/drivers/gpu/drm/meson/meson_drv.h
@@ -22,6 +22,7 @@
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/of.h>
+#include <linux/soc/amlogic/meson-canvas.h>
 #include <drm/drmP.h>
 
 struct meson_drm {
@@ -31,6 +32,9 @@ struct meson_drm {
 	struct regmap *dmc;
 	int vsync_irq;
 
+	struct meson_canvas *canvas;
+	u8 canvas_id_osd1;
+
 	struct drm_device *drm;
 	struct drm_crtc *crtc;
 	struct drm_fbdev_cma *fbdev;
diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
index 12c80dfcff59..51bec8e98a39 100644
--- a/drivers/gpu/drm/meson/meson_plane.c
+++ b/drivers/gpu/drm/meson/meson_plane.c
@@ -90,6 +90,7 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
 		.y2 = state->crtc_y + state->crtc_h,
 	};
 	unsigned long flags;
+	u8 canvas_id_osd1;
 
 	/*
 	 * Update Coordinates
@@ -104,8 +105,13 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
 				   (0xFF << OSD_GLOBAL_ALPHA_SHIFT) |
 				   OSD_BLK0_ENABLE;
 
+	if (priv->canvas)
+		canvas_id_osd1 = priv->canvas_id_osd1;
+	else
+		canvas_id_osd1 = MESON_CANVAS_ID_OSD1;
+
 	/* Set up BLK0 to point to the right canvas */
-	priv->viu.osd1_blk0_cfg[0] = ((MESON_CANVAS_ID_OSD1 << OSD_CANVAS_SEL) |
+	priv->viu.osd1_blk0_cfg[0] = ((canvas_id_osd1 << OSD_CANVAS_SEL) |
 				      OSD_ENDIANNESS_LE);
 
 	/* On GXBB, Use the old non-HDR RGB2YUV converter */
-- 
2.19.1