[PATCH v9 0/7] Add connector dynamic selection capability

[PATCH v9 0/7] Add connector dynamic selection capability

[Jason-JH.Lin]

To support DSI and eDP as main display connector without modifying
mtk-drm driver, we add connector dynamic selection capability.

Change in v9:
1. change subject title and [PATCH v9 5/7] title.
2. separate [PATCH v8 4/8] to 2 parts and merge them into [PATCH v9 4/7]
   and [PATCH v9 5/7].
3. fix typo and some grammar problems in commit message.

Change in v8:
1. add mtk_drm_crtc_path enum to replace array index of all_drm_priv.
2. separate add encoder_index function to another patch.
3. separate add dpi and dsi encoder_index function implementation to
   another patch.
4. separate add dsi conn_routes support to another patch.
5. set encoder_index to -1 if comp->dev doesn't not exist and add
   (encoder_index >= 0) checking before assigning conn_routes.
6. move conn_routes statement to the end of mtk_drm_crtc_create.

Change in v7:
1. separate 2 fixes patch from v6.
2. remove unnecessary null checking and variable.
3. move ddp_comp checking to crtc create.

Change in v6:
1. remove max_ddp_comp_nr.

Change in v5:
1. Change conn_routes array to single component enum id.

Change in v4:
1. Change variable naming from conn_route_num to num_conn_routes.
2. Change he encoder_index function return valuew from int to unsigned int.

Change in v3:
1. Change max_num comparison statement to max().

Change in v2:
1. rebase on linux-next: next-20230426
2. Fix alphabetical order and max_num condition check problem.

Change in v1:
1. based on mediatek-drm maintainer's tree / mediatek-drm-next branch:
https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-next

Jason-JH.Lin (7):
  drm/mediatek: Add mmsys_dev_num to mt8188 vdosys0 driver data
  drm/mediatek: Add crtc path enum for all_drm_priv array
  drm/mediatek: Fix using wrong drm private data to bind mediatek-drm
  drm/mediatek: Add encoder_index function to mtk_ddp_comp_funcs for dpi
  drm/mediatek: Add connector dynamic selection capability for mt8188
  drm/mediatek: dsi: Support dynamic connector selection
  drm/mediatek: Support DSI on MT8188 VDOSYS0

 drivers/gpu/drm/mediatek/mtk_disp_drv.h     |  2 +
 drivers/gpu/drm/mediatek/mtk_dpi.c          |  9 +++
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 81 ++++++++++++++++++++-
 drivers/gpu/drm/mediatek/mtk_drm_crtc.h     |  5 +-
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 29 +++++++-
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  8 ++
 drivers/gpu/drm/mediatek/mtk_drm_drv.c      | 44 ++++++++---
 drivers/gpu/drm/mediatek/mtk_drm_drv.h      | 15 +++-
 drivers/gpu/drm/mediatek/mtk_dsi.c          |  9 +++
 9 files changed, 188 insertions(+), 14 deletions(-)

-- 
2.18.0


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[PATCH v9 1/7] drm/mediatek: Add mmsys_dev_num to mt8188 vdosys0 driver data

[Jason-JH.Lin]

Add missing mmsys_dev_num to mt8188 vdosys0 driver data.

Fixes: 54b48080278a ("drm/mediatek: Add mediatek-drm of vdosys0 support for mt8188")
Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 6dcb4ba2466c..249c9fd6347e 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -287,6 +287,7 @@ static const struct mtk_mmsys_driver_data mt8186_mmsys_driver_data = {
 static const struct mtk_mmsys_driver_data mt8188_vdosys0_driver_data = {
 	.main_path = mt8188_mtk_ddp_main,
 	.main_len = ARRAY_SIZE(mt8188_mtk_ddp_main),
+	.mmsys_dev_num = 1,
 };
 
 static const struct mtk_mmsys_driver_data mt8192_mmsys_driver_data = {
-- 
2.18.0


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Re: [PATCH v9 1/7] drm/mediatek: Add mmsys_dev_num to mt8188 vdosys0 driver data

[Fei Shao]

On Thu, Aug 10, 2023 at 2:35 AM Jason-JH.Lin <jason-jh.lin@mediatek.com> wrote:
>
> Add missing mmsys_dev_num to mt8188 vdosys0 driver data.
>
> Fixes: 54b48080278a ("drm/mediatek: Add mediatek-drm of vdosys0 support for mt8188")
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> Reviewed-by: CK Hu <ck.hu@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Tested with MT8188 and the internal display is up and functioning.

Reviewed-by: Fei Shao <fshao@chromium.org>
Tested-by: Fei Shao <fshao@chromium.org>

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[PATCH v9 2/7] drm/mediatek: Add crtc path enum for all_drm_priv array

[Jason-JH.Lin]

Add mtk_drm_crtc_path enum for each display path.

Instead of using array index of all_drm_priv in mtk_drm_kms_init(),
mtk_drm_crtc_path enum can make code more readable.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 6 +++---
 drivers/gpu/drm/mediatek/mtk_drm_drv.h | 8 +++++++-
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 249c9fd6347e..89a38561ba27 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -465,21 +465,21 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 		for (j = 0; j < private->data->mmsys_dev_num; j++) {
 			priv_n = private->all_drm_private[j];
 
-			if (i == 0 && priv_n->data->main_len) {
+			if (i == CRTC_MAIN && priv_n->data->main_len) {
 				ret = mtk_drm_crtc_create(drm, priv_n->data->main_path,
 							  priv_n->data->main_len, j);
 				if (ret)
 					goto err_component_unbind;
 
 				continue;
-			} else if (i == 1 && priv_n->data->ext_len) {
+			} else if (i == CRTC_EXT && priv_n->data->ext_len) {
 				ret = mtk_drm_crtc_create(drm, priv_n->data->ext_path,
 							  priv_n->data->ext_len, j);
 				if (ret)
 					goto err_component_unbind;
 
 				continue;
-			} else if (i == 2 && priv_n->data->third_len) {
+			} else if (i == CRTC_THIRD && priv_n->data->third_len) {
 				ret = mtk_drm_crtc_create(drm, priv_n->data->third_path,
 							  priv_n->data->third_len, j);
 				if (ret)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
index eb2fd45941f0..f4de8bb27685 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
@@ -9,11 +9,17 @@
 #include <linux/io.h>
 #include "mtk_drm_ddp_comp.h"
 
-#define MAX_CRTC	3
 #define MAX_CONNECTOR	2
 #define DDP_COMPONENT_DRM_OVL_ADAPTOR (DDP_COMPONENT_ID_MAX + 1)
 #define DDP_COMPONENT_DRM_ID_MAX (DDP_COMPONENT_DRM_OVL_ADAPTOR + 1)
 
+enum mtk_drm_crtc_path {
+	CRTC_MAIN,
+	CRTC_EXT,
+	CRTC_THIRD,
+	MAX_CRTC,
+};
+
 struct device;
 struct device_node;
 struct drm_crtc;
-- 
2.18.0


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Re: [PATCH v9 2/7] drm/mediatek: Add crtc path enum for all_drm_priv array

[Fei Shao]

On Thu, Aug 10, 2023 at 2:15 AM Jason-JH.Lin <jason-jh.lin@mediatek.com> wrote:
>
> Add mtk_drm_crtc_path enum for each display path.
>
> Instead of using array index of all_drm_priv in mtk_drm_kms_init(),
> mtk_drm_crtc_path enum can make code more readable.
>
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>

Tested with MT8188 and the internal display is up and functioning.

Reviewed-by: Fei Shao <fshao@chromium.org>
Tested-by: Fei Shao <fshao@chromium.org>

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Re: [PATCH v9 2/7] drm/mediatek: Add crtc path enum for all_drm_priv array

[CK Hu (胡俊光)]

On Thu, 2023-08-10 at 02:15 +0800, Jason-JH.Lin wrote:
> Add mtk_drm_crtc_path enum for each display path.
> 
> Instead of using array index of all_drm_priv in mtk_drm_kms_init(),
> mtk_drm_crtc_path enum can make code more readable.

Reviewed-by: CK Hu <ck.hu@mediatek.com>

> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c | 6 +++---
>  drivers/gpu/drm/mediatek/mtk_drm_drv.h | 8 +++++++-
>  2 files changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index 249c9fd6347e..89a38561ba27 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -465,21 +465,21 @@ static int mtk_drm_kms_init(struct drm_device
> *drm)
>  		for (j = 0; j < private->data->mmsys_dev_num; j++) {
>  			priv_n = private->all_drm_private[j];
>  
> -			if (i == 0 && priv_n->data->main_len) {
> +			if (i == CRTC_MAIN && priv_n->data->main_len) {
>  				ret = mtk_drm_crtc_create(drm, priv_n-
> >data->main_path,
>  							  priv_n->data-
> >main_len, j);
>  				if (ret)
>  					goto err_component_unbind;
>  
>  				continue;
> -			} else if (i == 1 && priv_n->data->ext_len) {
> +			} else if (i == CRTC_EXT && priv_n->data-
> >ext_len) {
>  				ret = mtk_drm_crtc_create(drm, priv_n-
> >data->ext_path,
>  							  priv_n->data-
> >ext_len, j);
>  				if (ret)
>  					goto err_component_unbind;
>  
>  				continue;
> -			} else if (i == 2 && priv_n->data->third_len) {
> +			} else if (i == CRTC_THIRD && priv_n->data-
> >third_len) {
>  				ret = mtk_drm_crtc_create(drm, priv_n-
> >data->third_path,
>  							  priv_n->data-
> >third_len, j);
>  				if (ret)
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> index eb2fd45941f0..f4de8bb27685 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -9,11 +9,17 @@
>  #include <linux/io.h>
>  #include "mtk_drm_ddp_comp.h"
>  
> -#define MAX_CRTC	3
>  #define MAX_CONNECTOR	2
>  #define DDP_COMPONENT_DRM_OVL_ADAPTOR (DDP_COMPONENT_ID_MAX + 1)
>  #define DDP_COMPONENT_DRM_ID_MAX (DDP_COMPONENT_DRM_OVL_ADAPTOR + 1)
>  
> +enum mtk_drm_crtc_path {
> +	CRTC_MAIN,
> +	CRTC_EXT,
> +	CRTC_THIRD,
> +	MAX_CRTC,
> +};
> +
>  struct device;
>  struct device_node;
>  struct drm_crtc;
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[PATCH v9 3/7] drm/mediatek: Fix using wrong drm private data to bind mediatek-drm

[Jason-JH.Lin]

According to mtk_drm_kms_init(), the all_drm_private array in each
drm private data stores all drm private data in display path order.

In mtk_drm_get_all_drm_priv(), each element in all_drm_priv should have one
display path private data, such as:
all_drm_priv[CRTC_MAIN] should only have main_path data
all_drm_priv[CRTC_EXT] should only have ext_path data
all_drm_priv[CRTC_THIRD] should only have third_path data

So we need to add the length checking for each display path before
assigning their drm private data into all_drm_priv array.

Then the all_drm_private array in each drm private data needs to be
assigned in their display path order.

Fixes: 1ef7ed48356c ("drm/mediatek: Modify mediatek-drm for mt8195 multi mmsys support")
Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 89a38561ba27..c12886f31e54 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -351,6 +351,7 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
 {
 	struct mtk_drm_private *drm_priv = dev_get_drvdata(dev);
 	struct mtk_drm_private *all_drm_priv[MAX_CRTC];
+	struct mtk_drm_private *temp_drm_priv;
 	struct device_node *phandle = dev->parent->of_node;
 	const struct of_device_id *of_id;
 	struct device_node *node;
@@ -373,9 +374,18 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
 		if (!drm_dev || !dev_get_drvdata(drm_dev))
 			continue;
 
-		all_drm_priv[cnt] = dev_get_drvdata(drm_dev);
-		if (all_drm_priv[cnt] && all_drm_priv[cnt]->mtk_drm_bound)
-			cnt++;
+		temp_drm_priv = dev_get_drvdata(drm_dev);
+		if (temp_drm_priv) {
+			if (temp_drm_priv->mtk_drm_bound)
+				cnt++;
+
+			if (temp_drm_priv->data->main_len)
+				all_drm_priv[CRTC_MAIN] = temp_drm_priv;
+			else if (temp_drm_priv->data->ext_len)
+				all_drm_priv[CRTC_EXT] = temp_drm_priv;
+			else if (temp_drm_priv->data->third_len)
+				all_drm_priv[CRTC_THIRD] = temp_drm_priv;
+		}
 	}
 
 	if (drm_priv->data->mmsys_dev_num == cnt) {
-- 
2.18.0


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Re: [PATCH v9 3/7] drm/mediatek: Fix using wrong drm private data to bind mediatek-drm

[Fei Shao]

On Thu, Aug 10, 2023 at 2:15 AM Jason-JH.Lin <jason-jh.lin@mediatek.com> wrote:
>
> According to mtk_drm_kms_init(), the all_drm_private array in each
> drm private data stores all drm private data in display path order.
>
> In mtk_drm_get_all_drm_priv(), each element in all_drm_priv should have one
> display path private data, such as:
> all_drm_priv[CRTC_MAIN] should only have main_path data
> all_drm_priv[CRTC_EXT] should only have ext_path data
> all_drm_priv[CRTC_THIRD] should only have third_path data
>
> So we need to add the length checking for each display path before
> assigning their drm private data into all_drm_priv array.
>
> Then the all_drm_private array in each drm private data needs to be
> assigned in their display path order.
>
> Fixes: 1ef7ed48356c ("drm/mediatek: Modify mediatek-drm for mt8195 multi mmsys support")
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Reviewed-by: CK Hu <ck.hu@mediatek.com>

Tested-by: Fei Shao <fshao@chromium.org>

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[PATCH v9 4/7] drm/mediatek: Add encoder_index function to mtk_ddp_comp_funcs for dpi

[Jason-JH.Lin]

To support dynamic connector selection function, each ddp_comp need to
get their encoder_index to identify which connector should be selected.

Add encoder_index function to mtk_ddp_comp_funcs and the implementation
of mtk_dpi_encoder_index to get its encoder_index.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_drv.h     | 1 +
 drivers/gpu/drm/mediatek/mtk_dpi.c          | 9 +++++++++
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
 4 files changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index 2254038519e1..5f07037670e9 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -44,6 +44,7 @@ void mtk_dither_set_common(void __iomem *regs, struct cmdq_client_reg *cmdq_reg,
 
 void mtk_dpi_start(struct device *dev);
 void mtk_dpi_stop(struct device *dev);
+unsigned int mtk_dpi_encoder_index(struct device *dev);
 
 void mtk_dsi_ddp_start(struct device *dev);
 void mtk_dsi_ddp_stop(struct device *dev);
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 948a53f1f4b3..3d6b3c228f30 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -782,6 +782,15 @@ void mtk_dpi_stop(struct device *dev)
 	mtk_dpi_power_off(dpi);
 }
 
+unsigned int mtk_dpi_encoder_index(struct device *dev)
+{
+	struct mtk_dpi *dpi = dev_get_drvdata(dev);
+	unsigned int encoder_index = drm_encoder_index(&dpi->encoder);
+
+	dev_dbg(dev, "encoder index:%d\n", encoder_index);
+	return encoder_index;
+}
+
 static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
 {
 	struct mtk_dpi *dpi = dev_get_drvdata(dev);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index f114da4d36a9..effaaa769b46 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -304,6 +304,7 @@ static const struct mtk_ddp_comp_funcs ddp_dither = {
 static const struct mtk_ddp_comp_funcs ddp_dpi = {
 	.start = mtk_dpi_start,
 	.stop = mtk_dpi_stop,
+	.encoder_index = mtk_dpi_encoder_index,
 };
 
 static const struct mtk_ddp_comp_funcs ddp_dsc = {
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index febcaeef16a1..326cb57a18c9 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -80,6 +80,7 @@ struct mtk_ddp_comp_funcs {
 	void (*disconnect)(struct device *dev, struct device *mmsys_dev, unsigned int next);
 	void (*add)(struct device *dev, struct mtk_mutex *mutex);
 	void (*remove)(struct device *dev, struct mtk_mutex *mutex);
+	unsigned int (*encoder_index)(struct device *dev);
 };
 
 struct mtk_ddp_comp {
-- 
2.18.0


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Re: [PATCH v9 4/7] drm/mediatek: Add encoder_index function to mtk_ddp_comp_funcs for dpi

[Fei Shao]

On Thu, Aug 10, 2023 at 2:15 AM Jason-JH.Lin <jason-jh.lin@mediatek.com> wrote:
>
> To support dynamic connector selection function, each ddp_comp need to
> get their encoder_index to identify which connector should be selected.
>
> Add encoder_index function to mtk_ddp_comp_funcs and the implementation
> of mtk_dpi_encoder_index to get its encoder_index.
>
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>

Reviewed-by: Fei Shao <fshao@chromium.org>
Tested-by: Fei Shao <fshao@chromium.org>

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Re: [PATCH v9 4/7] drm/mediatek: Add encoder_index function to mtk_ddp_comp_funcs for dpi

[CK Hu (胡俊光)]

Hi, Jason:

On Thu, 2023-08-10 at 02:15 +0800, Jason-JH.Lin wrote:
> To support dynamic connector selection function, each ddp_comp need
> to
> get their encoder_index to identify which connector should be
> selected.
> 
> Add encoder_index function to mtk_ddp_comp_funcs and the
> implementation
> of mtk_dpi_encoder_index to get its encoder_index.

Separate the common part and dpi part to different patch.

Regards,
CK

> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_drv.h     | 1 +
>  drivers/gpu/drm/mediatek/mtk_dpi.c          | 9 +++++++++
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
>  4 files changed, 12 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 2254038519e1..5f07037670e9 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -44,6 +44,7 @@ void mtk_dither_set_common(void __iomem *regs,
> struct cmdq_client_reg *cmdq_reg,
>  
>  void mtk_dpi_start(struct device *dev);
>  void mtk_dpi_stop(struct device *dev);
> +unsigned int mtk_dpi_encoder_index(struct device *dev);
>  
>  void mtk_dsi_ddp_start(struct device *dev);
>  void mtk_dsi_ddp_stop(struct device *dev);
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c
> b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index 948a53f1f4b3..3d6b3c228f30 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -782,6 +782,15 @@ void mtk_dpi_stop(struct device *dev)
>  	mtk_dpi_power_off(dpi);
>  }
>  
> +unsigned int mtk_dpi_encoder_index(struct device *dev)
> +{
> +	struct mtk_dpi *dpi = dev_get_drvdata(dev);
> +	unsigned int encoder_index = drm_encoder_index(&dpi->encoder);
> +
> +	dev_dbg(dev, "encoder index:%d\n", encoder_index);
> +	return encoder_index;
> +}
> +
>  static int mtk_dpi_bind(struct device *dev, struct device *master,
> void *data)
>  {
>  	struct mtk_dpi *dpi = dev_get_drvdata(dev);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index f114da4d36a9..effaaa769b46 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -304,6 +304,7 @@ static const struct mtk_ddp_comp_funcs ddp_dither
> = {
>  static const struct mtk_ddp_comp_funcs ddp_dpi = {
>  	.start = mtk_dpi_start,
>  	.stop = mtk_dpi_stop,
> +	.encoder_index = mtk_dpi_encoder_index,
>  };
>  
>  static const struct mtk_ddp_comp_funcs ddp_dsc = {
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index febcaeef16a1..326cb57a18c9 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -80,6 +80,7 @@ struct mtk_ddp_comp_funcs {
>  	void (*disconnect)(struct device *dev, struct device
> *mmsys_dev, unsigned int next);
>  	void (*add)(struct device *dev, struct mtk_mutex *mutex);
>  	void (*remove)(struct device *dev, struct mtk_mutex *mutex);
> +	unsigned int (*encoder_index)(struct device *dev);
>  };
>  
>  struct mtk_ddp_comp {
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Re: [PATCH v9 4/7] drm/mediatek: Add encoder_index function to mtk_ddp_comp_funcs for dpi

[Jason-JH Lin (林睿祥)]

Hi CK,

Thanks for the reviews.

On Mon, 2023-09-18 at 07:18 +0000, CK Hu (胡俊光) wrote:
> Hi, Jason:
> 
> On Thu, 2023-08-10 at 02:15 +0800, Jason-JH.Lin wrote:
> > To support dynamic connector selection function, each ddp_comp need
> > to
> > get their encoder_index to identify which connector should be
> > selected.
> > 
> > Add encoder_index function to mtk_ddp_comp_funcs and the
> > implementation
> > of mtk_dpi_encoder_index to get its encoder_index.
> 
> Separate the common part and dpi part to different patch.
> 

OK, I'll separate the common part at the next version.

> Regards,
> CK
> 
> > 
> > Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_disp_drv.h     | 1 +
> >  drivers/gpu/drm/mediatek/mtk_dpi.c          | 9 +++++++++
> >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
> >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
> >  4 files changed, 12 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > index 2254038519e1..5f07037670e9 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> > @@ -44,6 +44,7 @@ void mtk_dither_set_common(void __iomem *regs,
> > struct cmdq_client_reg *cmdq_reg,
> >  
> >  void mtk_dpi_start(struct device *dev);
> >  void mtk_dpi_stop(struct device *dev);
> > +unsigned int mtk_dpi_encoder_index(struct device *dev);
> >  
> >  void mtk_dsi_ddp_start(struct device *dev);
> >  void mtk_dsi_ddp_stop(struct device *dev);
> > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c
> > b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > index 948a53f1f4b3..3d6b3c228f30 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> > @@ -782,6 +782,15 @@ void mtk_dpi_stop(struct device *dev)
> >  	mtk_dpi_power_off(dpi);
> >  }
> >  
> > +unsigned int mtk_dpi_encoder_index(struct device *dev)
> > +{
> > +	struct mtk_dpi *dpi = dev_get_drvdata(dev);
> > +	unsigned int encoder_index = drm_encoder_index(&dpi->encoder);
> > +
> > +	dev_dbg(dev, "encoder index:%d\n", encoder_index);
> > +	return encoder_index;
> > +}
> > +
> >  static int mtk_dpi_bind(struct device *dev, struct device *master,
> > void *data)
> >  {
> >  	struct mtk_dpi *dpi = dev_get_drvdata(dev);
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index f114da4d36a9..effaaa769b46 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -304,6 +304,7 @@ static const struct mtk_ddp_comp_funcs
> > ddp_dither
> > = {
> >  static const struct mtk_ddp_comp_funcs ddp_dpi = {
> >  	.start = mtk_dpi_start,
> >  	.stop = mtk_dpi_stop,
> > +	.encoder_index = mtk_dpi_encoder_index,
> >  };
> >  
> >  static const struct mtk_ddp_comp_funcs ddp_dsc = {
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > index febcaeef16a1..326cb57a18c9 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > @@ -80,6 +80,7 @@ struct mtk_ddp_comp_funcs {
> >  	void (*disconnect)(struct device *dev, struct device
> > *mmsys_dev, unsigned int next);
> >  	void (*add)(struct device *dev, struct mtk_mutex *mutex);
> >  	void (*remove)(struct device *dev, struct mtk_mutex *mutex);
> > +	unsigned int (*encoder_index)(struct device *dev);
> >  };
> >  
> >  struct mtk_ddp_comp {
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[PATCH v9 5/7] drm/mediatek: Add connector dynamic selection capability for mt8188

[Jason-JH.Lin]

Add dynamic select available connector flow in mtk_drm_crtc_create()
and mtk_drm_crtc_atomic_enable().

In mtk_drm_crtc_create(), if there is a connector routes array in drm
driver data, all components definded in the connector routes array will
be checked and their encoder_index will be set.

In mtk_drm_crtc_atomic_enable(), crtc will check its encoder_index to
identify which componet in the connector routes array should append.

Move DDP_COMPONENT_DP_INTF0 from mt8188_mtk_ddp_main array to a
connector routes array called mt8188_mtk_ddp_main_routes to support
dynamic selection capability for mt8188.

Signed-off-by: Nancy Lin <nancy.lin@mediatek.com>
Signed-off-by: Nathan Lu <nathan.lu@mediatek.com>
Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 81 ++++++++++++++++++++-
 drivers/gpu/drm/mediatek/mtk_drm_crtc.h     |  5 +-
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 27 ++++++-
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  7 ++
 drivers/gpu/drm/mediatek/mtk_drm_drv.c      | 20 ++++-
 drivers/gpu/drm/mediatek/mtk_drm_drv.h      |  7 ++
 6 files changed, 140 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index d40142842f85..c57012f9c0c8 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -62,6 +62,8 @@ struct mtk_drm_crtc {
 	struct mtk_mutex		*mutex;
 	unsigned int			ddp_comp_nr;
 	struct mtk_ddp_comp		**ddp_comp;
+	unsigned int			num_conn_routes;
+	const struct mtk_drm_route	*conn_routes;
 
 	/* lock for display hardware access */
 	struct mutex			hw_lock;
@@ -649,6 +651,47 @@ static void mtk_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 	mtk_ddp_comp_disable_vblank(comp);
 }
 
+static void mtk_drm_crtc_update_output(struct drm_crtc *crtc,
+				       struct drm_atomic_state *state)
+{
+	int crtc_index = drm_crtc_index(crtc);
+	int i;
+	struct device *dev;
+	struct drm_crtc_state *crtc_state = state->crtcs[crtc_index].new_state;
+	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+	struct mtk_drm_private *priv = crtc->dev->dev_private;
+	unsigned int comp_id;
+	unsigned int encoder_mask = crtc_state->encoder_mask;
+
+	if (!crtc_state->connectors_changed)
+		return;
+
+	if (!mtk_crtc->num_conn_routes)
+		return;
+
+	priv = priv->all_drm_private[crtc_index];
+	dev = priv->dev;
+
+	dev_dbg(dev, "connector change:%d, encoder mask:0x%x for crtc:%d\n",
+		crtc_state->connectors_changed, encoder_mask, crtc_index);
+
+	for (i = 0; i < mtk_crtc->num_conn_routes; i++) {
+		struct mtk_ddp_comp *comp;
+
+		comp_id = mtk_crtc->conn_routes[i].route_ddp;
+		comp = &priv->ddp_comp[comp_id];
+		if (comp->encoder_index >= 0 &&
+		    encoder_mask & BIT(comp->encoder_index)) {
+			mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr - 1] = comp;
+			dev_dbg(dev, "Add comp_id: %d at path index %d\n",
+				comp->id, mtk_crtc->ddp_comp_nr - 1);
+			break;
+		}
+	}
+
+	dev_dbg(dev, "Update total comp num:%d", mtk_crtc->ddp_comp_nr);
+}
+
 int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane *plane,
 			     struct mtk_plane_state *state)
 {
@@ -681,6 +724,8 @@ static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
 
 	DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
 
+	mtk_drm_crtc_update_output(crtc, state);
+
 	ret = pm_runtime_resume_and_get(comp->dev);
 	if (ret < 0) {
 		DRM_DEV_ERROR(comp->dev, "Failed to enable power domain: %d\n", ret);
@@ -886,7 +931,8 @@ struct device *mtk_drm_crtc_dma_dev_get(struct drm_crtc *crtc)
 
 int mtk_drm_crtc_create(struct drm_device *drm_dev,
 			const unsigned int *path, unsigned int path_len,
-			int priv_data_index)
+			int priv_data_index, const struct mtk_drm_route *conn_routes,
+			unsigned int num_conn_routes)
 {
 	struct mtk_drm_private *priv = drm_dev->dev_private;
 	struct device *dev = drm_dev->dev;
@@ -1040,5 +1086,38 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 		init_waitqueue_head(&mtk_crtc->cb_blocking_queue);
 	}
 #endif
+
+	if (conn_routes) {
+		struct device_node *node;
+		struct mtk_ddp_comp *comp;
+		unsigned int comp_id;
+
+		for (i = 0; i < num_conn_routes; i++) {
+			comp_id = conn_routes[i].route_ddp;
+			node = priv->comp_node[comp_id];
+			comp = &priv->ddp_comp[comp_id];
+
+			if (!comp->dev) {
+				dev_dbg(dev, "comp_id:%d, Component %pOF not initialized\n",
+					comp_id, node);
+				comp->encoder_index = -1;
+				continue;
+			}
+
+			mtk_ddp_comp_encoder_index_set(&priv->ddp_comp[comp_id]);
+		}
+
+		mtk_crtc->num_conn_routes = num_conn_routes;
+		mtk_crtc->conn_routes = conn_routes;
+
+		/* append the last ddp_comp and ddp_comp_nr at the end of mtk_drm_crtc_create */
+		mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr] =
+			devm_kmalloc(dev, sizeof(*mtk_crtc->ddp_comp), GFP_KERNEL);
+		if (!mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr])
+			return -ENOMEM;
+
+		mtk_crtc->ddp_comp_nr++;
+	}
+
 	return 0;
 }
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
index 3e9046993d09..3c224595fa71 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
@@ -8,6 +8,7 @@
 
 #include <drm/drm_crtc.h>
 #include "mtk_drm_ddp_comp.h"
+#include "mtk_drm_drv.h"
 #include "mtk_drm_plane.h"
 
 #define MTK_LUT_SIZE	512
@@ -18,7 +19,9 @@ void mtk_drm_crtc_commit(struct drm_crtc *crtc);
 int mtk_drm_crtc_create(struct drm_device *drm_dev,
 			const unsigned int *path,
 			unsigned int path_len,
-			int priv_data_index);
+			int priv_data_index,
+			const struct mtk_drm_route *conn_routes,
+			unsigned int num_conn_routes);
 int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane *plane,
 			     struct mtk_plane_state *state);
 void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct drm_plane *plane,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index effaaa769b46..c1ea112e6be8 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -508,6 +508,23 @@ static bool mtk_drm_find_comp_in_ddp(struct device *dev,
 	return false;
 }
 
+static int mtk_drm_find_comp_in_ddp_conn_path(struct device *dev,
+					      const struct mtk_drm_route *routes,
+					      unsigned int num_routes,
+					      struct mtk_ddp_comp *ddp_comp)
+{
+	unsigned int i;
+
+	if (!routes)
+		return -EINVAL;
+
+	for (i = 0; i < num_routes; i++)
+		if (dev == ddp_comp[routes[i].route_ddp].dev)
+			return BIT(routes[i].crtc_id);
+
+	return -ENODEV;
+}
+
 int mtk_ddp_comp_get_id(struct device_node *node,
 			enum mtk_ddp_comp_type comp_type)
 {
@@ -539,7 +556,15 @@ unsigned int mtk_drm_find_possible_crtc_by_comp(struct drm_device *drm,
 					  private->data->third_len, private->ddp_comp))
 		ret = BIT(2);
 	else
-		DRM_INFO("Failed to find comp in ddp table\n");
+		ret = mtk_drm_find_comp_in_ddp_conn_path(dev,
+							 private->data->conn_routes,
+							 private->data->num_conn_routes,
+							 private->ddp_comp);
+
+	if (ret <= 0) {
+		DRM_INFO("Failed to find comp in ddp table, ret =%d\n", ret);
+		ret = 0;
+	}
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 326cb57a18c9..d16c9cb20199 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -87,6 +87,7 @@ struct mtk_ddp_comp {
 	struct device *dev;
 	int irq;
 	unsigned int id;
+	unsigned int encoder_index;
 	const struct mtk_ddp_comp_funcs *funcs;
 };
 
@@ -276,6 +277,12 @@ static inline bool mtk_ddp_comp_disconnect(struct mtk_ddp_comp *comp, struct dev
 	return false;
 }
 
+static inline void mtk_ddp_comp_encoder_index_set(struct mtk_ddp_comp *comp)
+{
+	if (comp->funcs && comp->funcs->encoder_index)
+		comp->encoder_index = comp->funcs->encoder_index(comp->dev);
+}
+
 int mtk_ddp_comp_get_id(struct device_node *node,
 			enum mtk_ddp_comp_type comp_type);
 unsigned int mtk_drm_find_possible_crtc_by_comp(struct drm_device *drm,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index c12886f31e54..9900007667a2 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -185,7 +185,10 @@ static const unsigned int mt8188_mtk_ddp_main[] = {
 	DDP_COMPONENT_GAMMA,
 	DDP_COMPONENT_POSTMASK0,
 	DDP_COMPONENT_DITHER0,
-	DDP_COMPONENT_DP_INTF0,
+};
+
+static const struct mtk_drm_route mt8188_mtk_ddp_main_routes[] = {
+	{0, DDP_COMPONENT_DP_INTF0},
 };
 
 static const unsigned int mt8192_mtk_ddp_main[] = {
@@ -287,6 +290,8 @@ static const struct mtk_mmsys_driver_data mt8186_mmsys_driver_data = {
 static const struct mtk_mmsys_driver_data mt8188_vdosys0_driver_data = {
 	.main_path = mt8188_mtk_ddp_main,
 	.main_len = ARRAY_SIZE(mt8188_mtk_ddp_main),
+	.conn_routes = mt8188_mtk_ddp_main_routes,
+	.num_conn_routes = ARRAY_SIZE(mt8188_mtk_ddp_main_routes),
 	.mmsys_dev_num = 1,
 };
 
@@ -419,6 +424,11 @@ static bool mtk_drm_find_mmsys_comp(struct mtk_drm_private *private, int comp_id
 			if (drv_data->third_path[i] == comp_id)
 				return true;
 
+	if (drv_data->num_conn_routes)
+		for (i = 0; i < drv_data->num_conn_routes; i++)
+			if (drv_data->conn_routes[i].route_ddp == comp_id)
+				return true;
+
 	return false;
 }
 
@@ -477,21 +487,23 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 
 			if (i == CRTC_MAIN && priv_n->data->main_len) {
 				ret = mtk_drm_crtc_create(drm, priv_n->data->main_path,
-							  priv_n->data->main_len, j);
+							  priv_n->data->main_len, j,
+							  priv_n->data->conn_routes,
+							  priv_n->data->num_conn_routes);
 				if (ret)
 					goto err_component_unbind;
 
 				continue;
 			} else if (i == CRTC_EXT && priv_n->data->ext_len) {
 				ret = mtk_drm_crtc_create(drm, priv_n->data->ext_path,
-							  priv_n->data->ext_len, j);
+							  priv_n->data->ext_len, j, NULL, 0);
 				if (ret)
 					goto err_component_unbind;
 
 				continue;
 			} else if (i == CRTC_THIRD && priv_n->data->third_len) {
 				ret = mtk_drm_crtc_create(drm, priv_n->data->third_path,
-							  priv_n->data->third_len, j);
+							  priv_n->data->third_len, j, NULL, 0);
 				if (ret)
 					goto err_component_unbind;
 
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
index f4de8bb27685..6f98fff4f1a4 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
@@ -28,6 +28,11 @@ struct drm_fb_helper;
 struct drm_property;
 struct regmap;
 
+struct mtk_drm_route {
+	const unsigned int crtc_id;
+	const unsigned int route_ddp;
+};
+
 struct mtk_mmsys_driver_data {
 	const unsigned int *main_path;
 	unsigned int main_len;
@@ -35,6 +40,8 @@ struct mtk_mmsys_driver_data {
 	unsigned int ext_len;
 	const unsigned int *third_path;
 	unsigned int third_len;
+	const struct mtk_drm_route *conn_routes;
+	unsigned int num_conn_routes;
 
 	bool shadow_register;
 	unsigned int mmsys_id;
-- 
2.18.0


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Re: [PATCH v9 5/7] drm/mediatek: Add connector dynamic selection capability for mt8188

[Fei Shao]

On Thu, Aug 10, 2023 at 2:16 AM Jason-JH.Lin <jason-jh.lin@mediatek.com> wrote:
>
> Add dynamic select available connector flow in mtk_drm_crtc_create()
> and mtk_drm_crtc_atomic_enable().
>
> In mtk_drm_crtc_create(), if there is a connector routes array in drm
> driver data, all components definded in the connector routes array will
> be checked and their encoder_index will be set.
>
> In mtk_drm_crtc_atomic_enable(), crtc will check its encoder_index to
> identify which componet in the connector routes array should append.
>
> Move DDP_COMPONENT_DP_INTF0 from mt8188_mtk_ddp_main array to a
> connector routes array called mt8188_mtk_ddp_main_routes to support
> dynamic selection capability for mt8188.
>
> Signed-off-by: Nancy Lin <nancy.lin@mediatek.com>
> Signed-off-by: Nathan Lu <nathan.lu@mediatek.com>
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>

Tested-by: Fei Shao <fshao@chromium.org>

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Re: [PATCH v9 5/7] drm/mediatek: Add connector dynamic selection capability for mt8188

[CK Hu (胡俊光)]

Hi, Jason:

On Thu, 2023-08-10 at 02:15 +0800, Jason-JH.Lin wrote:
> Add dynamic select available connector flow in mtk_drm_crtc_create()
> and mtk_drm_crtc_atomic_enable().
> 
> In mtk_drm_crtc_create(), if there is a connector routes array in drm
> driver data, all components definded in the connector routes array
> will
> be checked and their encoder_index will be set.
> 
> In mtk_drm_crtc_atomic_enable(), crtc will check its encoder_index to
> identify which componet in the connector routes array should append.
> 
> Move DDP_COMPONENT_DP_INTF0 from mt8188_mtk_ddp_main array to a
> connector routes array called mt8188_mtk_ddp_main_routes to support
> dynamic selection capability for mt8188.
> 
> Signed-off-by: Nancy Lin <nancy.lin@mediatek.com>
> Signed-off-by: Nathan Lu <nathan.lu@mediatek.com>
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 81
> ++++++++++++++++++++-
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.h     |  5 +-
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 27 ++++++-
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  7 ++
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c      | 20 ++++-
>  drivers/gpu/drm/mediatek/mtk_drm_drv.h      |  7 ++
>  6 files changed, 140 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index d40142842f85..c57012f9c0c8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -62,6 +62,8 @@ struct mtk_drm_crtc {
>  	struct mtk_mutex		*mutex;
>  	unsigned int			ddp_comp_nr;
>  	struct mtk_ddp_comp		**ddp_comp;
> +	unsigned int			num_conn_routes;
> +	const struct mtk_drm_route	*conn_routes;
>  
>  	/* lock for display hardware access */
>  	struct mutex			hw_lock;
> @@ -649,6 +651,47 @@ static void mtk_drm_crtc_disable_vblank(struct
> drm_crtc *crtc)
>  	mtk_ddp_comp_disable_vblank(comp);
>  }
>  
> +static void mtk_drm_crtc_update_output(struct drm_crtc *crtc,
> +				       struct drm_atomic_state *state)
> +{
> +	int crtc_index = drm_crtc_index(crtc);
> +	int i;
> +	struct device *dev;
> +	struct drm_crtc_state *crtc_state = state-
> >crtcs[crtc_index].new_state;
> +	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
> +	struct mtk_drm_private *priv = crtc->dev->dev_private;
> +	unsigned int comp_id;
> +	unsigned int encoder_mask = crtc_state->encoder_mask;
> +
> +	if (!crtc_state->connectors_changed)
> +		return;
> +
> +	if (!mtk_crtc->num_conn_routes)
> +		return;
> +
> +	priv = priv->all_drm_private[crtc_index];
> +	dev = priv->dev;
> +
> +	dev_dbg(dev, "connector change:%d, encoder mask:0x%x for
> crtc:%d\n",
> +		crtc_state->connectors_changed, encoder_mask,
> crtc_index);
> +
> +	for (i = 0; i < mtk_crtc->num_conn_routes; i++) {
> +		struct mtk_ddp_comp *comp;
> +
> +		comp_id = mtk_crtc->conn_routes[i].route_ddp;
> +		comp = &priv->ddp_comp[comp_id];
> +		if (comp->encoder_index >= 0 &&
> +		    encoder_mask & BIT(comp->encoder_index)) {
> +			mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr - 1] =
> comp;
> +			dev_dbg(dev, "Add comp_id: %d at path index
> %d\n",
> +				comp->id, mtk_crtc->ddp_comp_nr - 1);
> +			break;
> +		}
> +	}
> +
> +	dev_dbg(dev, "Update total comp num:%d", mtk_crtc-
> >ddp_comp_nr);

Why print this? You does not update comp num.

> +}
> +
>  int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane
> *plane,
>  			     struct mtk_plane_state *state)
>  {
> @@ -681,6 +724,8 @@ static void mtk_drm_crtc_atomic_enable(struct
> drm_crtc *crtc,
>  
>  	DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
>  
> +	mtk_drm_crtc_update_output(crtc, state);
> +
>  	ret = pm_runtime_resume_and_get(comp->dev);
>  	if (ret < 0) {
>  		DRM_DEV_ERROR(comp->dev, "Failed to enable power
> domain: %d\n", ret);
> @@ -886,7 +931,8 @@ struct device *mtk_drm_crtc_dma_dev_get(struct
> drm_crtc *crtc)
>  
>  int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  			const unsigned int *path, unsigned int
> path_len,
> -			int priv_data_index)
> +			int priv_data_index, const struct mtk_drm_route
> *conn_routes,
> +			unsigned int num_conn_routes)
>  {
>  	struct mtk_drm_private *priv = drm_dev->dev_private;
>  	struct device *dev = drm_dev->dev;
> @@ -1040,5 +1086,38 @@ int mtk_drm_crtc_create(struct drm_device
> *drm_dev,
>  		init_waitqueue_head(&mtk_crtc->cb_blocking_queue);
>  	}
>  #endif
> +
> +	if (conn_routes) {
> +		struct device_node *node;
> +		struct mtk_ddp_comp *comp;
> +		unsigned int comp_id;
> +
> +		for (i = 0; i < num_conn_routes; i++) {
> +			comp_id = conn_routes[i].route_ddp;
> +			node = priv->comp_node[comp_id];
> +			comp = &priv->ddp_comp[comp_id];
> +
> +			if (!comp->dev) {
> +				dev_dbg(dev, "comp_id:%d, Component
> %pOF not initialized\n",

I would like add comment that we allow route component device is not
enabled make set comp->encoder_index to -1 to mark this.

> +					comp_id, node);
> +				comp->encoder_index = -1;
> +				continue;
> +			}
> +
> +			mtk_ddp_comp_encoder_index_set(&priv-
> >ddp_comp[comp_id]);
> +		}
> +
> +		mtk_crtc->num_conn_routes = num_conn_routes;
> +		mtk_crtc->conn_routes = conn_routes;
> +
> +		/* append the last ddp_comp and ddp_comp_nr at the end
> of mtk_drm_crtc_create */
> +		mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr] =
> +			devm_kmalloc(dev, sizeof(*mtk_crtc->ddp_comp),
> GFP_KERNEL);

mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr] is not valid here. You may
increase mtk_crtc->ddp_comp_nr before mtk_crtc->ddp_comp is allocated.

> +		if (!mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr])
> +			return -ENOMEM;
> +
> +		mtk_crtc->ddp_comp_nr++;
> +	}
> +
>  	return 0;
>  }
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> index 3e9046993d09..3c224595fa71 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> @@ -8,6 +8,7 @@
>  
>  #include <drm/drm_crtc.h>
>  #include "mtk_drm_ddp_comp.h"
> +#include "mtk_drm_drv.h"
>  #include "mtk_drm_plane.h"
>  
>  #define MTK_LUT_SIZE	512
> @@ -18,7 +19,9 @@ void mtk_drm_crtc_commit(struct drm_crtc *crtc);
>  int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  			const unsigned int *path,
>  			unsigned int path_len,
> -			int priv_data_index);
> +			int priv_data_index,
> +			const struct mtk_drm_route *conn_routes,
> +			unsigned int num_conn_routes);
>  int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane
> *plane,
>  			     struct mtk_plane_state *state);
>  void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct
> drm_plane *plane,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index effaaa769b46..c1ea112e6be8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -508,6 +508,23 @@ static bool mtk_drm_find_comp_in_ddp(struct
> device *dev,
>  	return false;
>  }
>  
> +static int mtk_drm_find_comp_in_ddp_conn_path(struct device *dev,
> +					      const struct
> mtk_drm_route *routes,
> +					      unsigned int num_routes,
> +					      struct mtk_ddp_comp
> *ddp_comp)
> +{
> +	unsigned int i;
> +
> +	if (!routes)
> +		return -EINVAL;
> +
> +	for (i = 0; i < num_routes; i++)
> +		if (dev == ddp_comp[routes[i].route_ddp].dev)
> +			return BIT(routes[i].crtc_id);
> +
> +	return -ENODEV;
> +}
> +
>  int mtk_ddp_comp_get_id(struct device_node *node,
>  			enum mtk_ddp_comp_type comp_type)
>  {
> @@ -539,7 +556,15 @@ unsigned int
> mtk_drm_find_possible_crtc_by_comp(struct drm_device *drm,
>  					  private->data->third_len,
> private->ddp_comp))
>  		ret = BIT(2);
>  	else
> -		DRM_INFO("Failed to find comp in ddp table\n");
> +		ret = mtk_drm_find_comp_in_ddp_conn_path(dev,
> +							 private->data-
> >conn_routes,
> +							 private->data-
> >num_conn_routes,
> +							 private-
> >ddp_comp);
> +
> +	if (ret <= 0) {
> +		DRM_INFO("Failed to find comp in ddp table, ret =%d\n",
> ret);
> +		ret = 0;
> +	}
>  
>  	return ret;
>  }
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 326cb57a18c9..d16c9cb20199 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -87,6 +87,7 @@ struct mtk_ddp_comp {
>  	struct device *dev;
>  	int irq;
>  	unsigned int id;
> +	unsigned int encoder_index;
>  	const struct mtk_ddp_comp_funcs *funcs;
>  };
>  
> @@ -276,6 +277,12 @@ static inline bool
> mtk_ddp_comp_disconnect(struct mtk_ddp_comp *comp, struct dev
>  	return false;
>  }
>  
> +static inline void mtk_ddp_comp_encoder_index_set(struct
> mtk_ddp_comp *comp)
> +{
> +	if (comp->funcs && comp->funcs->encoder_index)
> +		comp->encoder_index = comp->funcs->encoder_index(comp-
> >dev);
> +}

I would like this to be a separate patch of adding ddp comp encoder
index interface. Part of [4/7] would be that patch also.

> +
>  int mtk_ddp_comp_get_id(struct device_node *node,
>  			enum mtk_ddp_comp_type comp_type);
>  unsigned int mtk_drm_find_possible_crtc_by_comp(struct drm_device
> *drm,
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index c12886f31e54..9900007667a2 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -185,7 +185,10 @@ static const unsigned int mt8188_mtk_ddp_main[]
> = {
>  	DDP_COMPONENT_GAMMA,
>  	DDP_COMPONENT_POSTMASK0,
>  	DDP_COMPONENT_DITHER0,
> -	DDP_COMPONENT_DP_INTF0,
> +};
> +
> +static const struct mtk_drm_route mt8188_mtk_ddp_main_routes[] = {
> +	{0, DDP_COMPONENT_DP_INTF0},
>  };

I would like separate mt8188 modification to another patch and make
this patch independent of each SoC.

>  
>  static const unsigned int mt8192_mtk_ddp_main[] = {
> @@ -287,6 +290,8 @@ static const struct mtk_mmsys_driver_data
> mt8186_mmsys_driver_data = {
>  static const struct mtk_mmsys_driver_data mt8188_vdosys0_driver_data
> = {
>  	.main_path = mt8188_mtk_ddp_main,
>  	.main_len = ARRAY_SIZE(mt8188_mtk_ddp_main),
> +	.conn_routes = mt8188_mtk_ddp_main_routes,
> +	.num_conn_routes = ARRAY_SIZE(mt8188_mtk_ddp_main_routes),
>  	.mmsys_dev_num = 1,
>  };
>  
> @@ -419,6 +424,11 @@ static bool mtk_drm_find_mmsys_comp(struct
> mtk_drm_private *private, int comp_id
>  			if (drv_data->third_path[i] == comp_id)
>  				return true;
>  
> +	if (drv_data->num_conn_routes)
> +		for (i = 0; i < drv_data->num_conn_routes; i++)
> +			if (drv_data->conn_routes[i].route_ddp ==
> comp_id)
> +				return true;
> +
>  	return false;
>  }
>  
> @@ -477,21 +487,23 @@ static int mtk_drm_kms_init(struct drm_device
> *drm)
>  
>  			if (i == CRTC_MAIN && priv_n->data->main_len) {
>  				ret = mtk_drm_crtc_create(drm, priv_n-
> >data->main_path,
> -							  priv_n->data-
> >main_len, j);
> +							  priv_n->data-
> >main_len, j,
> +							  priv_n->data-
> >conn_routes,
> +							  priv_n->data-
> >num_conn_routes);
>  				if (ret)
>  					goto err_component_unbind;
>  
>  				continue;
>  			} else if (i == CRTC_EXT && priv_n->data-
> >ext_len) {
>  				ret = mtk_drm_crtc_create(drm, priv_n-
> >data->ext_path,
> -							  priv_n->data-
> >ext_len, j);
> +							  priv_n->data-
> >ext_len, j, NULL, 0);
>  				if (ret)
>  					goto err_component_unbind;
>  
>  				continue;
>  			} else if (i == CRTC_THIRD && priv_n->data-
> >third_len) {
>  				ret = mtk_drm_crtc_create(drm, priv_n-
> >data->third_path,
> -							  priv_n->data-
> >third_len, j);
> +							  priv_n->data-
> >third_len, j, NULL, 0);
>  				if (ret)
>  					goto err_component_unbind;
>  
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> index f4de8bb27685..6f98fff4f1a4 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -28,6 +28,11 @@ struct drm_fb_helper;
>  struct drm_property;
>  struct regmap;
>  
> +struct mtk_drm_route {
> +	const unsigned int crtc_id;
> +	const unsigned int route_ddp;
> +};
> +
>  struct mtk_mmsys_driver_data {
>  	const unsigned int *main_path;
>  	unsigned int main_len;
> @@ -35,6 +40,8 @@ struct mtk_mmsys_driver_data {
>  	unsigned int ext_len;
>  	const unsigned int *third_path;
>  	unsigned int third_len;
> +	const struct mtk_drm_route *conn_routes;
> +	unsigned int num_conn_routes;
>  
>  	bool shadow_register;
>  	unsigned int mmsys_id;
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Re: [PATCH v9 5/7] drm/mediatek: Add connector dynamic selection capability for mt8188

[Jason-JH Lin (林睿祥)]

Hi CK,

Thanks for the reviews.

On Mon, 2023-09-18 at 07:06 +0000, CK Hu (胡俊光) wrote:
> Hi, Jason:
> 
> On Thu, 2023-08-10 at 02:15 +0800, Jason-JH.Lin wrote:
> > Add dynamic select available connector flow in
> > mtk_drm_crtc_create()
> > and mtk_drm_crtc_atomic_enable().
> > 
> > In mtk_drm_crtc_create(), if there is a connector routes array in
> > drm
> > driver data, all components definded in the connector routes array
> > will
> > be checked and their encoder_index will be set.
> > 
> > In mtk_drm_crtc_atomic_enable(), crtc will check its encoder_index
> > to
> > identify which componet in the connector routes array should
> > append.
> > 
> > Move DDP_COMPONENT_DP_INTF0 from mt8188_mtk_ddp_main array to a
> > connector routes array called mt8188_mtk_ddp_main_routes to support
> > dynamic selection capability for mt8188.
> > 
> > Signed-off-by: Nancy Lin <nancy.lin@mediatek.com>
> > Signed-off-by: Nathan Lu <nathan.lu@mediatek.com>
> > Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 81
> > ++++++++++++++++++++-
> >  drivers/gpu/drm/mediatek/mtk_drm_crtc.h     |  5 +-
> >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 27 ++++++-
> >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  7 ++
> >  drivers/gpu/drm/mediatek/mtk_drm_drv.c      | 20 ++++-
> >  drivers/gpu/drm/mediatek/mtk_drm_drv.h      |  7 ++
> >  6 files changed, 140 insertions(+), 7 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > index d40142842f85..c57012f9c0c8 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > @@ -62,6 +62,8 @@ struct mtk_drm_crtc {
> >  	struct mtk_mutex		*mutex;
> >  	unsigned int			ddp_comp_nr;
> >  	struct mtk_ddp_comp		**ddp_comp;
> > +	unsigned int			num_conn_routes;
> > +	const struct mtk_drm_route	*conn_routes;
> >  
> >  	/* lock for display hardware access */
> >  	struct mutex			hw_lock;
> > @@ -649,6 +651,47 @@ static void mtk_drm_crtc_disable_vblank(struct
> > drm_crtc *crtc)
> >  	mtk_ddp_comp_disable_vblank(comp);
> >  }
> >  
> > +static void mtk_drm_crtc_update_output(struct drm_crtc *crtc,
> > +				       struct drm_atomic_state *state)
> > +{
> > +	int crtc_index = drm_crtc_index(crtc);
> > +	int i;
> > +	struct device *dev;
> > +	struct drm_crtc_state *crtc_state = state-
> > > crtcs[crtc_index].new_state;
> > 
> > +	struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
> > +	struct mtk_drm_private *priv = crtc->dev->dev_private;
> > +	unsigned int comp_id;
> > +	unsigned int encoder_mask = crtc_state->encoder_mask;
> > +
> > +	if (!crtc_state->connectors_changed)
> > +		return;
> > +
> > +	if (!mtk_crtc->num_conn_routes)
> > +		return;
> > +
> > +	priv = priv->all_drm_private[crtc_index];
> > +	dev = priv->dev;
> > +
> > +	dev_dbg(dev, "connector change:%d, encoder mask:0x%x for
> > crtc:%d\n",
> > +		crtc_state->connectors_changed, encoder_mask,
> > crtc_index);
> > +
> > +	for (i = 0; i < mtk_crtc->num_conn_routes; i++) {
> > +		struct mtk_ddp_comp *comp;
> > +
> > +		comp_id = mtk_crtc->conn_routes[i].route_ddp;
> > +		comp = &priv->ddp_comp[comp_id];
> > +		if (comp->encoder_index >= 0 &&
> > +		    encoder_mask & BIT(comp->encoder_index)) {
> > +			mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr - 1] =
> > comp;
> > +			dev_dbg(dev, "Add comp_id: %d at path index
> > %d\n",
> > +				comp->id, mtk_crtc->ddp_comp_nr - 1);
> > +			break;
> > +		}
> > +	}
> > +
> > +	dev_dbg(dev, "Update total comp num:%d", mtk_crtc-
> > > ddp_comp_nr);
> 
> Why print this? You does not update comp num.

OK, I'll remove this message.

> 
> > +}
> > +
> >  int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct
> > drm_plane
> > *plane,
> >  			     struct mtk_plane_state *state)
> >  {
> > @@ -681,6 +724,8 @@ static void mtk_drm_crtc_atomic_enable(struct
> > drm_crtc *crtc,
> >  
> >  	DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
> >  
> > +	mtk_drm_crtc_update_output(crtc, state);
> > +
> >  	ret = pm_runtime_resume_and_get(comp->dev);
> >  	if (ret < 0) {
> >  		DRM_DEV_ERROR(comp->dev, "Failed to enable power
> > domain: %d\n", ret);
> > @@ -886,7 +931,8 @@ struct device *mtk_drm_crtc_dma_dev_get(struct
> > drm_crtc *crtc)
> >  
> >  int mtk_drm_crtc_create(struct drm_device *drm_dev,
> >  			const unsigned int *path, unsigned int
> > path_len,
> > -			int priv_data_index)
> > +			int priv_data_index, const struct mtk_drm_route
> > *conn_routes,
> > +			unsigned int num_conn_routes)
> >  {
> >  	struct mtk_drm_private *priv = drm_dev->dev_private;
> >  	struct device *dev = drm_dev->dev;
> > @@ -1040,5 +1086,38 @@ int mtk_drm_crtc_create(struct drm_device
> > *drm_dev,
> >  		init_waitqueue_head(&mtk_crtc->cb_blocking_queue);
> >  	}
> >  #endif
> > +
> > +	if (conn_routes) {
> > +		struct device_node *node;
> > +		struct mtk_ddp_comp *comp;
> > +		unsigned int comp_id;
> > +
> > +		for (i = 0; i < num_conn_routes; i++) {
> > +			comp_id = conn_routes[i].route_ddp;
> > +			node = priv->comp_node[comp_id];
> > +			comp = &priv->ddp_comp[comp_id];
> > +
> > +			if (!comp->dev) {
> > +				dev_dbg(dev, "comp_id:%d, Component
> > %pOF not initialized\n",
> 
> I would like add comment that we allow route component device is not
> enabled make set comp->encoder_index to -1 to mark this.

OK, I'll add the comment for that.

> 
> > +					comp_id, node);
> > +				comp->encoder_index = -1;
> > +				continue;
> > +			}
> > +
> > +			mtk_ddp_comp_encoder_index_set(&priv-
> > > ddp_comp[comp_id]);
> > 
> > +		}
> > +
> > +		mtk_crtc->num_conn_routes = num_conn_routes;
> > +		mtk_crtc->conn_routes = conn_routes;
> > +
> > +		/* append the last ddp_comp and ddp_comp_nr at the end
> > of mtk_drm_crtc_create */
> > +		mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr] =
> > +			devm_kmalloc(dev, sizeof(*mtk_crtc->ddp_comp),
> > GFP_KERNEL);
> 
> mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr] is not valid here. You may
> increase mtk_crtc->ddp_comp_nr before mtk_crtc->ddp_comp is
> allocated.
> 

OK, I'll calculate the max array size first, then allocate the array.

> > +		if (!mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr])
> > +			return -ENOMEM;
> > +
> > +		mtk_crtc->ddp_comp_nr++;
> > +	}
> > +
> >  	return 0;
> >  }
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> > b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> > index 3e9046993d09..3c224595fa71 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> > @@ -8,6 +8,7 @@
> >  
> >  #include <drm/drm_crtc.h>
> >  #include "mtk_drm_ddp_comp.h"
> > +#include "mtk_drm_drv.h"
> >  #include "mtk_drm_plane.h"
> >  
> >  #define MTK_LUT_SIZE	512
> > @@ -18,7 +19,9 @@ void mtk_drm_crtc_commit(struct drm_crtc *crtc);
> >  int mtk_drm_crtc_create(struct drm_device *drm_dev,
> >  			const unsigned int *path,
> >  			unsigned int path_len,
> > -			int priv_data_index);
> > +			int priv_data_index,
> > +			const struct mtk_drm_route *conn_routes,
> > +			unsigned int num_conn_routes);
> >  int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct
> > drm_plane
> > *plane,
> >  			     struct mtk_plane_state *state);
> >  void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct
> > drm_plane *plane,
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index effaaa769b46..c1ea112e6be8 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -508,6 +508,23 @@ static bool mtk_drm_find_comp_in_ddp(struct
> > device *dev,
> >  	return false;
> >  }
> >  
> > +static int mtk_drm_find_comp_in_ddp_conn_path(struct device *dev,
> > +					      const struct
> > mtk_drm_route *routes,
> > +					      unsigned int num_routes,
> > +					      struct mtk_ddp_comp
> > *ddp_comp)
> > +{
> > +	unsigned int i;
> > +
> > +	if (!routes)
> > +		return -EINVAL;
> > +
> > +	for (i = 0; i < num_routes; i++)
> > +		if (dev == ddp_comp[routes[i].route_ddp].dev)
> > +			return BIT(routes[i].crtc_id);
> > +
> > +	return -ENODEV;
> > +}
> > +
> >  int mtk_ddp_comp_get_id(struct device_node *node,
> >  			enum mtk_ddp_comp_type comp_type)
> >  {
> > @@ -539,7 +556,15 @@ unsigned int
> > mtk_drm_find_possible_crtc_by_comp(struct drm_device *drm,
> >  					  private->data->third_len,
> > private->ddp_comp))
> >  		ret = BIT(2);
> >  	else
> > -		DRM_INFO("Failed to find comp in ddp table\n");
> > +		ret = mtk_drm_find_comp_in_ddp_conn_path(dev,
> > +							 private->data-
> > > conn_routes,
> > 
> > +							 private->data-
> > > num_conn_routes,
> > 
> > +							 private-
> > > ddp_comp);
> > 
> > +
> > +	if (ret <= 0) {
> > +		DRM_INFO("Failed to find comp in ddp table, ret =%d\n",
> > ret);
> > +		ret = 0;
> > +	}
> >  
> >  	return ret;
> >  }
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > index 326cb57a18c9..d16c9cb20199 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > @@ -87,6 +87,7 @@ struct mtk_ddp_comp {
> >  	struct device *dev;
> >  	int irq;
> >  	unsigned int id;
> > +	unsigned int encoder_index;
> >  	const struct mtk_ddp_comp_funcs *funcs;
> >  };
> >  
> > @@ -276,6 +277,12 @@ static inline bool
> > mtk_ddp_comp_disconnect(struct mtk_ddp_comp *comp, struct dev
> >  	return false;
> >  }
> >  
> > +static inline void mtk_ddp_comp_encoder_index_set(struct
> > mtk_ddp_comp *comp)
> > +{
> > +	if (comp->funcs && comp->funcs->encoder_index)
> > +		comp->encoder_index = comp->funcs->encoder_index(comp-
> > > dev);
> > 
> > +}
> 
> I would like this to be a separate patch of adding ddp comp encoder
> index interface. Part of [4/7] would be that patch also.

OK I'll separate it.

> 
> > +
> >  int mtk_ddp_comp_get_id(struct device_node *node,
> >  			enum mtk_ddp_comp_type comp_type);
> >  unsigned int mtk_drm_find_possible_crtc_by_comp(struct drm_device
> > *drm,
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > index c12886f31e54..9900007667a2 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> > @@ -185,7 +185,10 @@ static const unsigned int
> > mt8188_mtk_ddp_main[]
> > = {
> >  	DDP_COMPONENT_GAMMA,
> >  	DDP_COMPONENT_POSTMASK0,
> >  	DDP_COMPONENT_DITHER0,
> > -	DDP_COMPONENT_DP_INTF0,
> > +};
> > +
> > +static const struct mtk_drm_route mt8188_mtk_ddp_main_routes[] = {
> > +	{0, DDP_COMPONENT_DP_INTF0},
> >  };
> 
> I would like separate mt8188 modification to another patch and make
> this patch independent of each SoC.

OK, I'll separate this to another patch.

Regards,
Jason-JH.Lin
> 
> >  
> >  static const unsigned int mt8192_mtk_ddp_main[] = {
> > @@ -287,6 +290,8 @@ static const struct mtk_mmsys_driver_data
> > mt8186_mmsys_driver_data = {
> >  static const struct mtk_mmsys_driver_data
> > mt8188_vdosys0_driver_data
> > = {
> >  	.main_path = mt8188_mtk_ddp_main,
> >  	.main_len = ARRAY_SIZE(mt8188_mtk_ddp_main),
> > +	.conn_routes = mt8188_mtk_ddp_main_routes,
> > +	.num_conn_routes = ARRAY_SIZE(mt8188_mtk_ddp_main_routes),
> >  	.mmsys_dev_num = 1,
> >  };
> >  
> > @@ -419,6 +424,11 @@ static bool mtk_drm_find_mmsys_comp(struct
> > mtk_drm_private *private, int comp_id
> >  			if (drv_data->third_path[i] == comp_id)
> >  				return true;
> >  
> > +	if (drv_data->num_conn_routes)
> > +		for (i = 0; i < drv_data->num_conn_routes; i++)
> > +			if (drv_data->conn_routes[i].route_ddp ==
> > comp_id)
> > +				return true;
> > +
> >  	return false;
> >  }
> >  
> > @@ -477,21 +487,23 @@ static int mtk_drm_kms_init(struct drm_device
> > *drm)
> >  
> >  			if (i == CRTC_MAIN && priv_n->data->main_len) {
> >  				ret = mtk_drm_crtc_create(drm, priv_n-
> > > data->main_path,
> > 
> > -							  priv_n->data-
> > > main_len, j);
> > 
> > +							  priv_n->data-
> > > main_len, j,
> > 
> > +							  priv_n->data-
> > > conn_routes,
> > 
> > +							  priv_n->data-
> > > num_conn_routes);
> > 
> >  				if (ret)
> >  					goto err_component_unbind;
> >  
> >  				continue;
> >  			} else if (i == CRTC_EXT && priv_n->data-
> > > ext_len) {
> > 
> >  				ret = mtk_drm_crtc_create(drm, priv_n-
> > > data->ext_path,
> > 
> > -							  priv_n->data-
> > > ext_len, j);
> > 
> > +							  priv_n->data-
> > > ext_len, j, NULL, 0);
> > 
> >  				if (ret)
> >  					goto err_component_unbind;
> >  
> >  				continue;
> >  			} else if (i == CRTC_THIRD && priv_n->data-
> > > third_len) {
> > 
> >  				ret = mtk_drm_crtc_create(drm, priv_n-
> > > data->third_path,
> > 
> > -							  priv_n->data-
> > > third_len, j);
> > 
> > +							  priv_n->data-
> > > third_len, j, NULL, 0);
> > 
> >  				if (ret)
> >  					goto err_component_unbind;
> >  
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> > b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> > index f4de8bb27685..6f98fff4f1a4 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> > @@ -28,6 +28,11 @@ struct drm_fb_helper;
> >  struct drm_property;
> >  struct regmap;
> >  
> > +struct mtk_drm_route {
> > +	const unsigned int crtc_id;
> > +	const unsigned int route_ddp;
> > +};
> > +
> >  struct mtk_mmsys_driver_data {
> >  	const unsigned int *main_path;
> >  	unsigned int main_len;
> > @@ -35,6 +40,8 @@ struct mtk_mmsys_driver_data {
> >  	unsigned int ext_len;
> >  	const unsigned int *third_path;
> >  	unsigned int third_len;
> > +	const struct mtk_drm_route *conn_routes;
> > +	unsigned int num_conn_routes;
> >  
> >  	bool shadow_register;
> >  	unsigned int mmsys_id;
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[PATCH v9 6/7] drm/mediatek: dsi: Support dynamic connector selection

[Jason-JH.Lin]

Add implementation of mtk_dsi_encoder_index to mtk_ddp_comp_func
to make mtk_dsi support dynamic connector selection.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_drv.h     | 1 +
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
 drivers/gpu/drm/mediatek/mtk_dsi.c          | 9 +++++++++
 3 files changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index 5f07037670e9..fdaa21b6a9da 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -48,6 +48,7 @@ unsigned int mtk_dpi_encoder_index(struct device *dev);
 
 void mtk_dsi_ddp_start(struct device *dev);
 void mtk_dsi_ddp_stop(struct device *dev);
+unsigned int mtk_dsi_encoder_index(struct device *dev);
 
 int mtk_gamma_clk_enable(struct device *dev);
 void mtk_gamma_clk_disable(struct device *dev);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index c1ea112e6be8..c93b1bae00dc 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -318,6 +318,7 @@ static const struct mtk_ddp_comp_funcs ddp_dsc = {
 static const struct mtk_ddp_comp_funcs ddp_dsi = {
 	.start = mtk_dsi_ddp_start,
 	.stop = mtk_dsi_ddp_stop,
+	.encoder_index = mtk_dsi_encoder_index,
 };
 
 static const struct mtk_ddp_comp_funcs ddp_gamma = {
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 7d5250351193..8c45dc19d39f 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -865,6 +865,15 @@ static int mtk_dsi_encoder_init(struct drm_device *drm, struct mtk_dsi *dsi)
 	return ret;
 }
 
+unsigned int mtk_dsi_encoder_index(struct device *dev)
+{
+	struct mtk_dsi *dsi = dev_get_drvdata(dev);
+	unsigned int encoder_index = drm_encoder_index(&dsi->encoder);
+
+	dev_dbg(dev, "encoder index:%d\n", encoder_index);
+	return encoder_index;
+}
+
 static int mtk_dsi_bind(struct device *dev, struct device *master, void *data)
 {
 	int ret;
-- 
2.18.0


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Re: [PATCH v9 6/7] drm/mediatek: dsi: Support dynamic connector selection

[Fei Shao]

On Thu, Aug 10, 2023 at 2:16 AM Jason-JH.Lin <jason-jh.lin@mediatek.com> wrote:
>
> Add implementation of mtk_dsi_encoder_index to mtk_ddp_comp_func
> to make mtk_dsi support dynamic connector selection.
>
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>

Reviewed-by: Fei Shao <fshao@chromium.org>
Tested-by: Fei Shao <fshao@chromium.org>

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Re: [PATCH v9 6/7] drm/mediatek: dsi: Support dynamic connector selection

[CK Hu (胡俊光)]

Hi, Jason:

On Thu, 2023-08-10 at 02:15 +0800, Jason-JH.Lin wrote:
> Add implementation of mtk_dsi_encoder_index to mtk_ddp_comp_func
> to make mtk_dsi support dynamic connector selection.

Reviewed-by: CK Hu <ck.hu@mediatek.com>

> 
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_disp_drv.h     | 1 +
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
>  drivers/gpu/drm/mediatek/mtk_dsi.c          | 9 +++++++++
>  3 files changed, 11 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 5f07037670e9..fdaa21b6a9da 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -48,6 +48,7 @@ unsigned int mtk_dpi_encoder_index(struct device
> *dev);
>  
>  void mtk_dsi_ddp_start(struct device *dev);
>  void mtk_dsi_ddp_stop(struct device *dev);
> +unsigned int mtk_dsi_encoder_index(struct device *dev);
>  
>  int mtk_gamma_clk_enable(struct device *dev);
>  void mtk_gamma_clk_disable(struct device *dev);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index c1ea112e6be8..c93b1bae00dc 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -318,6 +318,7 @@ static const struct mtk_ddp_comp_funcs ddp_dsc =
> {
>  static const struct mtk_ddp_comp_funcs ddp_dsi = {
>  	.start = mtk_dsi_ddp_start,
>  	.stop = mtk_dsi_ddp_stop,
> +	.encoder_index = mtk_dsi_encoder_index,
>  };
>  
>  static const struct mtk_ddp_comp_funcs ddp_gamma = {
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c
> b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index 7d5250351193..8c45dc19d39f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -865,6 +865,15 @@ static int mtk_dsi_encoder_init(struct
> drm_device *drm, struct mtk_dsi *dsi)
>  	return ret;
>  }
>  
> +unsigned int mtk_dsi_encoder_index(struct device *dev)
> +{
> +	struct mtk_dsi *dsi = dev_get_drvdata(dev);
> +	unsigned int encoder_index = drm_encoder_index(&dsi->encoder);
> +
> +	dev_dbg(dev, "encoder index:%d\n", encoder_index);
> +	return encoder_index;
> +}
> +
>  static int mtk_dsi_bind(struct device *dev, struct device *master,
> void *data)
>  {
>  	int ret;
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[PATCH v9 7/7] drm/mediatek: Support DSI on MT8188 VDOSYS0

[Jason-JH.Lin]

Add DSI as a main display output selection on MT8188 VDOSYS0.

Signed-off-by: Nathan Lu <nathan.lu@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 9900007667a2..fb7909b21bfa 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -189,6 +189,7 @@ static const unsigned int mt8188_mtk_ddp_main[] = {
 
 static const struct mtk_drm_route mt8188_mtk_ddp_main_routes[] = {
 	{0, DDP_COMPONENT_DP_INTF0},
+	{0, DDP_COMPONENT_DSI0},
 };
 
 static const unsigned int mt8192_mtk_ddp_main[] = {
-- 
2.18.0


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Re: [PATCH v9 7/7] drm/mediatek: Support DSI on MT8188 VDOSYS0

[Fei Shao]

On Thu, Aug 10, 2023 at 2:15 AM Jason-JH.Lin <jason-jh.lin@mediatek.com> wrote:
>
> Add DSI as a main display output selection on MT8188 VDOSYS0.
>
> Signed-off-by: Nathan Lu <nathan.lu@mediatek.com>
> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>

Reviewed-by: Fei Shao <fshao@chromium.org>
Tested-by: Fei Shao <fshao@chromium.org>

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