Re: [PATCH v15 20/22] drm/mediatek: add drm ovl_adaptor sub driver for MT8195

all subsystems

Hi CK,

Thanks for the review.

On Tue, 2022-03-15 at 13:08 +0800, CK Hu wrote:
Hi, Nancy:

On Fri, 2022-03-11 at 09:55 +0800, Nancy.Lin wrote:
Add drm ovl_adaptor sub driver. Bring up ovl_adaptor sub driver if
the component exists in the path.

Signed-off-by: Nancy.Lin <redacted>
Reviewed-by: AngeloGioacchino Del Regno <
angelogioacchino.delregno@collabora.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 18 ++++------
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 31 +++++++++++++---
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  1 +
 drivers/gpu/drm/mediatek/mtk_drm_drv.c      | 40 ++++++++++++-----
--
--
 4 files changed, 58 insertions(+), 32 deletions(-)

[snip]

+
 static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX]
=
{
 	[MTK_DISP_AAL] = "aal",
 	[MTK_DISP_BLS] = "bls",
@@ -398,6 +411,7 @@ static const char * const
mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
 	[MTK_DISP_OD] = "od",
 	[MTK_DISP_OVL] = "ovl",
 	[MTK_DISP_OVL_2L] = "ovl-2l",
+	[MTK_DISP_OVL_ADAPTOR] = "ovl_adaptor",
 	[MTK_DISP_POSTMASK] = "postmask",
 	[MTK_DISP_PWM] = "pwm",
 	[MTK_DISP_RDMA] = "rdma",
@@ -443,6 +457,7 @@ static const struct mtk_ddp_comp_match
mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
 	[DDP_COMPONENT_OVL_2L0]		= { MTK_DISP_OVL_2L,	0,
&ddp_ovl },
 	[DDP_COMPONENT_OVL_2L1]		= { MTK_DISP_OVL_2L,	1,
&ddp_ovl },
 	[DDP_COMPONENT_OVL_2L2]		= { MTK_DISP_OVL_2L,    2,
&ddp_ovl },
+	[DDP_COMPONENT_OVL_ADAPTOR]	= { MTK_DISP_OVL_ADAPTOR,	
0, &ddp_ovl_adaptor },
I'm not sure this indent is align to other line or not. If aligned or
not aligned and modify other line to be aligned,

Reviewed-by: CK Hu <redacted>
OK, I will fix it.

Regards,
Nancy

 	[DDP_COMPONENT_POSTMASK0]	= { MTK_DISP_POSTMASK,	0,
&ddp_postmask },
 	[DDP_COMPONENT_PWM0]		= { MTK_DISP_PWM,	0,
NULL },
 	[DDP_COMPONENT_PWM1]		= { MTK_DISP_PWM,	1,
NULL },
@@ -548,12 +563,17 @@ int mtk_ddp_comp_init(struct device_node
*node,
struct mtk_ddp_comp *comp,
 
 	comp->id = comp_id;
 	comp->funcs = mtk_ddp_matches[comp_id].funcs;
-	comp_pdev = of_find_device_by_node(node);
-	if (!comp_pdev) {
-		DRM_INFO("Waiting for device %s\n", node->full_name);
-		return -EPROBE_DEFER;
+	/* Not all drm components have a DTS device node, such as
ovl_adaptor,
+	 * which is the drm bring up sub driver
+	 */
+	if (node) {
+		comp_pdev = of_find_device_by_node(node);
+		if (!comp_pdev) {
+			DRM_INFO("Waiting for device %s\n", node-
full_name);

+			return -EPROBE_DEFER;
+		}
+		comp->dev = &comp_pdev->dev;
 	}
-	comp->dev = &comp_pdev->dev;
 
 	/* Only DMA capable components need the LARB property */
 	if (type == MTK_DISP_OVL ||
@@ -573,6 +593,7 @@ int mtk_ddp_comp_init(struct device_node *node,
struct mtk_ddp_comp *comp,
 	    type == MTK_DISP_MERGE ||
 	    type == MTK_DISP_OVL ||
 	    type == MTK_DISP_OVL_2L ||
+	    type == MTK_DISP_OVL_ADAPTOR ||
 	    type == MTK_DISP_PWM ||
 	    type == MTK_DISP_RDMA ||
 	    type == MTK_DPI ||

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 4f7fae41c916..1862eba41c45 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -30,6 +30,7 @@ enum mtk_ddp_comp_type {
 	MTK_DISP_OD,
 	MTK_DISP_OVL,
 	MTK_DISP_OVL_2L,
+	MTK_DISP_OVL_ADAPTOR,
 	MTK_DISP_POSTMASK,
 	MTK_DISP_PWM,
 	MTK_DISP_RDMA,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index a05703843af2..99f37f8f6639 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -351,9 +351,7 @@ static int mtk_drm_kms_init(struct drm_device
*drm)
 {
 	struct mtk_drm_private *private = drm->dev_private;
 	struct mtk_drm_private *priv_n;
-	struct platform_device *pdev;
-	struct device_node *np = NULL;
-	struct device *dma_dev;
+	struct device *dma_dev = NULL;
 	int ret, i, j;
 
 	ret = drmm_mode_config_init(drm);
@@ -388,7 +386,6 @@ static int mtk_drm_kms_init(struct drm_device
*drm)
 	 *    different drm private data structures. Loop through crtc
index to
 	 *    create crtc from the main path and then ext_path and
finally the
 	 *    third path.
-	 * 3. Use OVL device for all DMA memory allocations
 	 */
 	for (i = 0; i < MAX_CRTC; i++) {
 		for (j = 0; j < private->data->mmsys_dev_num; j++) {
@@ -400,9 +397,6 @@ static int mtk_drm_kms_init(struct drm_device
*drm)
 				if (ret)
 					goto err_component_unbind;
 
-				if (!np)
-					np = priv_n->comp_node[priv_n-
data->main_path[0]];

-
 				continue;
 			} else if (i == 1 && priv_n->data->ext_len) {
 				ret = mtk_drm_crtc_create(drm, priv_n-
data->ext_path,

@@ -410,9 +404,6 @@ static int mtk_drm_kms_init(struct drm_device
*drm)
 				if (ret)
 					goto err_component_unbind;
 
-				if (!np)
-					np = priv_n->comp_node[priv_n-
data->ext_path[0]];

-
 				continue;
 			} else if (i == 2 && priv_n->data->third_len) {
 				ret = mtk_drm_crtc_create(drm, priv_n-
data->third_path,

@@ -420,22 +411,19 @@ static int mtk_drm_kms_init(struct drm_device
*drm)
 				if (ret)
 					goto err_component_unbind;
 
-				if (!np)
-					np = priv_n->comp_node[priv_n-
data->third_path[0]];
-
 				continue;
 			}
 		}
 	}
 
-	pdev = of_find_device_by_node(np);
-	if (!pdev) {
+	/* Use OVL device for all DMA memory allocations */
+	dma_dev = mtk_drm_crtc_dma_dev_get(drm_crtc_from_index(drm,
0));
+	if (!dma_dev) {
 		ret = -ENODEV;
 		dev_err(drm->dev, "Need at least one OVL device\n");
 		goto err_component_unbind;
 	}
 
-	dma_dev = &pdev->dev;
 	for (i = 0; i < private->data->mmsys_dev_num; i++)
 		private->all_drm_private[i]->dma_dev = dma_dev;
 
@@ -514,6 +502,11 @@ static int compare_of(struct device *dev, void
*data)
 	return dev->of_node == data;
 }
 
+static int compare_dev(struct device *dev, void *data)
+{
+	return dev == (struct device *)data;
+}
+
 static int mtk_drm_bind(struct device *dev)
 {
 	struct mtk_drm_private *private = dev_get_drvdata(dev);
@@ -702,6 +695,7 @@ static int mtk_drm_probe(struct platform_device
*pdev)
 	struct mtk_drm_private *private;
 	struct device_node *node;
 	struct component_match *match = NULL;
+	struct platform_device *ovl_adaptor;
 	int ret;
 	int i;
 
@@ -727,6 +721,18 @@ static int mtk_drm_probe(struct
platform_device
*pdev)
 		return -ENODEV;
 	}
 
+	/* Bringup ovl_adaptor */
+	if (mtk_drm_find_mmsys_comp(private,
DDP_COMPONENT_OVL_ADAPTOR)) {
+		ovl_adaptor = platform_device_register_data(dev,
"mediatek-disp-ovl-adaptor",
+							    PLATFORM_DE
VID_AUTO,
+							    (void
*)private->mmsys_dev,
+							    sizeof(*pri
vate->mmsys_dev));
+		private->ddp_comp[DDP_COMPONENT_OVL_ADAPTOR].dev =
&ovl_adaptor->dev;
+		mtk_ddp_comp_init(NULL, &private-
ddp_comp[DDP_COMPONENT_OVL_ADAPTOR],
+				  DDP_COMPONENT_OVL_ADAPTOR);
+		component_match_add(dev, &match, compare_dev,
&ovl_adaptor->dev);
+	}
+
 	/* Iterate over sibling DISP function blocks */
 	for_each_child_of_node(phandle->parent, node) {
 		const struct of_device_id *of_id;
@@ -780,6 +786,7 @@ static int mtk_drm_probe(struct platform_device
*pdev)
 		    comp_type == MTK_DISP_MERGE ||
 		    comp_type == MTK_DISP_OVL ||
 		    comp_type == MTK_DISP_OVL_2L ||
+		    comp_type == MTK_DISP_OVL_ADAPTOR ||
 		    comp_type == MTK_DISP_RDMA ||
 		    comp_type == MTK_DPI ||
 		    comp_type == MTK_DSI) {
@@ -882,6 +889,7 @@ static struct platform_driver * const
mtk_drm_drivers[] = {
 	&mtk_disp_color_driver,
 	&mtk_disp_gamma_driver,
 	&mtk_disp_merge_driver,
+	&mtk_disp_ovl_adaptor_driver,
 	&mtk_disp_ovl_driver,
 	&mtk_disp_rdma_driver,
 	&mtk_dpi_driver,


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