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Message-ID: <68cc2867-fa22-075f-b1ec-a8042a1ac1a0@gmail.com>
Date:   Thu, 27 Apr 2023 14:17:17 +0200
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 Thunderbird/102.10.0
Subject: Re: [PATCH v2 1/2] drm/mediatek: Add ability to support dynamic
 connector selection
Content-Language: en-US, ca-ES, es-ES
To:     "Jason-JH.Lin" <jason-jh.lin@mediatek.com>,
        Chun-Kuang Hu <chunkuang.hu@kernel.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Alexandre Mergnat <amergnat@baylibre.com>
Cc:     Rex-BC Chen <rex-bc.chen@mediatek.com>,
        Jason-ch Chen <jason-ch.chen@mediatek.com>,
        Johnson Wang <johnson.wang@mediatek.com>,
        Singo Chang <singo.chang@mediatek.com>,
        Nancy Lin <nancy.lin@mediatek.com>,
        Shawn Sung <shawn.sung@mediatek.com>,
        dri-devel@lists.freedesktop.org,
        linux-mediatek@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Project_Global_Chrome_Upstream_Group@mediatek.com,
        Nathan Lu <nathan.lu@mediatek.com>
References: <20230427084040.3651-1-jason-jh.lin@mediatek.com>
 <20230427084040.3651-2-jason-jh.lin@mediatek.com>
From:   Matthias Brugger <matthias.bgg@gmail.com>
In-Reply-To: <20230427084040.3651-2-jason-jh.lin@mediatek.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk


On 27/04/2023 10:40, Jason-JH.Lin wrote:
> 1. Move output drm connector from each ddp_path array to connector array.
> 2. Add dynamic select available connector flow in crtc create and enable.
> 
> 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_disp_drv.h     |   1 +
>   drivers/gpu/drm/mediatek/mtk_dpi.c          |   9 ++
>   drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 112 +++++++++++++++++++-
>   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 |   8 ++
>   drivers/gpu/drm/mediatek/mtk_drm_drv.c      |  44 ++++++--
>   drivers/gpu/drm/mediatek/mtk_drm_drv.h      |   8 ++
>   8 files changed, 203 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 2254038519e1..72c57442f965 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);
> +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..765fc976e41f 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);
>   }
>   
> +int mtk_dpi_encoder_index(struct device *dev)
> +{
> +	struct mtk_dpi *dpi = dev_get_drvdata(dev);
> +	int encoder_index = drm_encoder_index(&dpi->encoder);
> +
> +	dev_dbg(dev, "encoder index:%d", 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_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index d40142842f85..2bafd377dcf4 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -60,8 +60,12 @@ struct mtk_drm_crtc {
>   	struct device			*mmsys_dev;
>   	struct device			*dma_dev;
>   	struct mtk_mutex		*mutex;
> +	unsigned int			ddp_comp_nr_ori;
> +	unsigned int			max_ddp_comp_nr;
>   	unsigned int			ddp_comp_nr;
>   	struct mtk_ddp_comp		**ddp_comp;
> +	unsigned int			conn_route_nr;
> +	const struct mtk_drm_route	*conn_routes;
>   
>   	/* lock for display hardware access */
>   	struct mutex			hw_lock;
> @@ -649,6 +653,85 @@ static void mtk_drm_crtc_disable_vblank(struct drm_crtc *crtc)
>   	mtk_ddp_comp_disable_vblank(comp);
>   }
>   
> +static unsigned int mtk_drm_crtc_max_num_route_comp(struct mtk_drm_crtc *mtk_crtc)
> +{
> +	unsigned int max_num = 0;
> +	unsigned int i;
> +
> +	if (!mtk_crtc->conn_route_nr)
> +		return 0;
> +
> +	for (i = 0; i < mtk_crtc->conn_route_nr; i++)
> +		if (max_num < mtk_crtc->conn_routes[i].route_len)
> +			max_num = mtk_crtc->conn_routes[i].route_len;

max_num = max(mtk_crtc->conn_routes[i].route_len, max_num);

Regards,
Matthias

> +
> +	return max_num;
> +}
> +
> +static int mtk_drm_crtc_update_output(struct drm_crtc *crtc,
> +				      struct drm_atomic_state *state)
> +{
> +	const struct mtk_drm_route *conn_routes;
> +	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;
> +	unsigned int route_len = 0, route_index = 0;
> +
> +	if (!mtk_crtc->conn_route_nr)
> +		return 0;
> +
> +	priv = priv->all_drm_private[crtc_index];
> +	dev = priv->dev;
> +
> +	dev_dbg(dev, "connector change:%d, encoder mask0x%x for crtc%d",
> +		crtc_state->connectors_changed, encoder_mask, crtc_index);
> +
> +	if (!crtc_state->connectors_changed)
> +		return 0;
> +
> +	conn_routes = mtk_crtc->conn_routes;
> +
> +	for (i = 0; i < mtk_crtc->conn_route_nr; i++) {
> +		route_len = conn_routes[i].route_len;
> +		if (route_len > 0) {
> +			comp_id = conn_routes[i].route_ddp[route_len - 1];
> +			if (priv->comp_node[comp_id]) {
> +				if ((1 << priv->ddp_comp[comp_id].encoder_index) == encoder_mask) {
> +					route_index = i;
> +					break;
> +				}
> +			}
> +		}
> +	}
> +
> +	for (i = 0; i < route_len; i++) {
> +		struct mtk_ddp_comp *comp;
> +		struct device_node *node;
> +
> +		comp_id = conn_routes[route_index].route_ddp[i];
> +		node = priv->comp_node[comp_id];
> +		comp = &priv->ddp_comp[comp_id];
> +		if (!comp) {
> +			dev_err(dev, "Component %pOF not initialized\n", node);
> +			return -ENODEV;
> +		}
> +
> +		mtk_crtc->ddp_comp[mtk_crtc->ddp_comp_nr_ori + i] = comp;
> +		dev_dbg(dev, "Add comp_id: %d at path index %d\n",
> +			comp->id, mtk_crtc->ddp_comp_nr_ori + i);
> +	}
> +
> +	mtk_crtc->ddp_comp_nr = mtk_crtc->ddp_comp_nr_ori + route_len;
> +	dev_dbg(dev, "Update total comp num:%d", mtk_crtc->ddp_comp_nr);
> +
> +	return 0;
> +}
> +
>   int mtk_drm_crtc_plane_check(struct drm_crtc *crtc, struct drm_plane *plane,
>   			     struct mtk_plane_state *state)
>   {
> @@ -681,6 +764,12 @@ static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
>   
>   	DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
>   
> +	ret = mtk_drm_crtc_update_output(crtc, state);
> +	if (ret < 0) {
> +		DRM_DEV_ERROR(comp->dev, "Failed to update crtc output: %d\n", ret);
> +		return;
> +	}
> +
>   	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 +975,8 @@ 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 conn_routes_num)
>   {
>   	struct mtk_drm_private *priv = drm_dev->dev_private;
>   	struct device *dev = drm_dev->dev;
> @@ -898,6 +988,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>   	uint gamma_lut_size = 0;
>   	struct drm_crtc *tmp;
>   	int crtc_i = 0;
> +	unsigned int route_len = 0, max_route_comp_num = 0;
>   
>   	if (!path)
>   		return 0;
> @@ -937,7 +1028,24 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>   
>   	mtk_crtc->mmsys_dev = priv->mmsys_dev;
>   	mtk_crtc->ddp_comp_nr = path_len;
> -	mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->ddp_comp_nr,
> +	mtk_crtc->ddp_comp_nr_ori = path_len;
> +	if (conn_routes) {
> +		unsigned int comp_id;
> +
> +		for (i = 0; i < conn_routes_num; i++) {
> +			route_len = conn_routes[i].route_len;
> +			if (route_len > 0) {
> +				comp_id = conn_routes[i].route_ddp[route_len - 1];
> +				mtk_ddp_comp_encoder_index_set(&priv->ddp_comp[comp_id]);
> +			}
> +		}
> +
> +		mtk_crtc->conn_route_nr = conn_routes_num;
> +		mtk_crtc->conn_routes = conn_routes;
> +	}
> +	max_route_comp_num = mtk_drm_crtc_max_num_route_comp(mtk_crtc);
> +	mtk_crtc->max_ddp_comp_nr  = mtk_crtc->ddp_comp_nr + max_route_comp_num;
> +	mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->max_ddp_comp_nr,
>   						sizeof(*mtk_crtc->ddp_comp),
>   						GFP_KERNEL);
>   	if (!mtk_crtc->ddp_comp)
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
> index 3e9046993d09..672b9c7afee6 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 conn_routes_num);
>   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 f114da4d36a9..fe20ce26b19f 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 = {
> @@ -507,6 +508,26 @@ 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 routes_num,
> +					      struct mtk_ddp_comp *ddp_comp)
> +{
> +	unsigned int i;
> +
> +	if (!routes)
> +		return 0;
> +
> +	for (i = 0; i < routes_num; i++)
> +		if (mtk_drm_find_comp_in_ddp(dev, routes[i].route_ddp,
> +					     routes[i].route_len, ddp_comp))
> +			return BIT(routes[i].crtc_id);
> +
> +	DRM_INFO("Failed to find comp in ddp connector table\n");
> +
> +	return 0;
> +}
> +
>   int mtk_ddp_comp_get_id(struct device_node *node,
>   			enum mtk_ddp_comp_type comp_type)
>   {
> @@ -538,6 +559,12 @@ unsigned int mtk_drm_find_possible_crtc_by_comp(struct drm_device *drm,
>   					  private->data->third_len, private->ddp_comp))
>   		ret = BIT(2);
>   	else
> +		ret = mtk_drm_find_comp_in_ddp_conn_path(dev,
> +							 private->data->conn_routes,
> +							 private->data->conn_routes_num,
> +							 private->ddp_comp);
> +
> +	if (ret == 0)
>   		DRM_INFO("Failed to find comp in ddp table\n");
>   
>   	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 febcaeef16a1..1c1d670cfe41 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);
> +	int (*encoder_index)(struct device *dev);
>   };
>   
>   struct mtk_ddp_comp {
> @@ -87,6 +88,7 @@ struct mtk_ddp_comp {
>   	int irq;
>   	unsigned int id;
>   	const struct mtk_ddp_comp_funcs *funcs;
> +	int encoder_index;
>   };
>   
>   static inline int mtk_ddp_comp_clk_enable(struct mtk_ddp_comp *comp)
> @@ -275,6 +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 6dcb4ba2466c..d8c49614a107 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -185,7 +185,14 @@ static const unsigned int mt8188_mtk_ddp_main[] = {
>   	DDP_COMPONENT_GAMMA,
>   	DDP_COMPONENT_POSTMASK0,
>   	DDP_COMPONENT_DITHER0,
> -	DDP_COMPONENT_DP_INTF0,
> +};
> +
> +static const unsigned int mt8188_mtk_ddp_main_routes_0[] = {
> +	DDP_COMPONENT_DP_INTF0
> +};
> +
> +static const struct mtk_drm_route mt8188_mtk_ddp_main_routes[] = {
> +	{0, ARRAY_SIZE(mt8188_mtk_ddp_main_routes_0), mt8188_mtk_ddp_main_routes_0},
>   };
>   
>   static const unsigned int mt8192_mtk_ddp_main[] = {
> @@ -287,6 +294,9 @@ 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,
> +	.conn_routes_num = ARRAY_SIZE(mt8188_mtk_ddp_main_routes),
> +	.mmsys_dev_num = 1,
>   };
>   
>   static const struct mtk_mmsys_driver_data mt8192_mmsys_driver_data = {
> @@ -350,6 +360,7 @@ 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;
> @@ -372,9 +383,18 @@ 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[0] = temp_drm_priv;
> +			else if (temp_drm_priv->data->ext_len)
> +				all_drm_priv[1] = temp_drm_priv;
> +			else if (temp_drm_priv->data->third_len)
> +				all_drm_priv[2] = temp_drm_priv;
> +		}
>   	}
>   
>   	if (drm_priv->data->mmsys_dev_num == cnt) {
> @@ -391,7 +411,7 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
>   static bool mtk_drm_find_mmsys_comp(struct mtk_drm_private *private, int comp_id)
>   {
>   	const struct mtk_mmsys_driver_data *drv_data = private->data;
> -	int i;
> +	int i, j;
>   
>   	if (drv_data->main_path)
>   		for (i = 0; i < drv_data->main_len; i++)
> @@ -408,6 +428,12 @@ 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->conn_routes_num)
> +		for (i = 0; i < drv_data->conn_routes_num; i++)
> +			for (j = 0; j < drv_data->conn_routes[i].route_len; j++)
> +				if (drv_data->conn_routes[i].route_ddp[j] == comp_id)
> +					return true;
> +
>   	return false;
>   }
>   
> @@ -466,21 +492,23 @@ static int mtk_drm_kms_init(struct drm_device *drm)
>   
>   			if (i == 0 && 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->conn_routes_num);
>   				if (ret)
>   					goto err_component_unbind;
>   
>   				continue;
>   			} else if (i == 1 && 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 == 2 && 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 eb2fd45941f0..8dca68ea1b94 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
> @@ -22,6 +22,12 @@ struct drm_fb_helper;
>   struct drm_property;
>   struct regmap;
>   
> +struct mtk_drm_route {
> +	const unsigned int crtc_id;
> +	const unsigned int route_len;
> +	const unsigned int *route_ddp;
> +};
> +
>   struct mtk_mmsys_driver_data {
>   	const unsigned int *main_path;
>   	unsigned int main_len;
> @@ -29,6 +35,8 @@ 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 conn_routes_num;
>   
>   	bool shadow_register;
>   	unsigned int mmsys_id;