[PATCH v4,0/3] Add mt8188 compatiable for DSI cmd packet control

[PATCH v4,0/3] Add mt8188 compatiable for DSI cmd packet control

[Shuijing Li]

Add dt-binding documentation of DSI for MediaTek MT8188 SoC.
Because of the difference between SOC and DSI cmd packet control, for
MT8188, it is necessary to increase the DSI_CMDQ_SIZE control when
sending long packets to initialize the panel. Of course, this will not
affect the sending of short packets.

Base on the branch of linus/master v6.5.

Shuijing Li (3):
  dt-bindings: display: mediatek: dsi: Add compatible for MediaTek
    MT8188
  drm/mediatek: dsi: Add dsi cmdq_ctl to send panel initial code
  drm/mediatek: Add mt8188 dsi compatible to mtk_dsi.c

 .../bindings/display/mediatek/mediatek,dsi.yaml   |  1 +
 drivers/gpu/drm/mediatek/mtk_drm_drv.c            |  2 ++
 drivers/gpu/drm/mediatek/mtk_dsi.c                | 15 +++++++++++++++
 3 files changed, 18 insertions(+)

-- 
2.40.1

[PATCH v4,1/3] dt-bindings: display: mediatek: dsi: Add compatible for MediaTek MT8188

[Shuijing Li]

Add dt-binding documentation of dsi for MediaTek MT8188 SoC.

Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../devicetree/bindings/display/mediatek/mediatek,dsi.yaml       | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.yaml
index 12441b937684..537e5304b730 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dsi.yaml
@@ -30,6 +30,7 @@ properties:
           - mediatek,mt8173-dsi
           - mediatek,mt8183-dsi
           - mediatek,mt8186-dsi
+          - mediatek,mt8188-dsi
       - items:
           - enum:
               - mediatek,mt6795-dsi
-- 
2.40.1

[PATCH v4,2/3] drm/mediatek: dsi: Add dsi cmdq_ctl to send panel initial code

[Shuijing Li]

For mt8188, add dsi cmdq reg control to send long packets to panel
initialization. MT8188 hardware has been changed to automatically
set the cmdq_size value by default when sending long packets.
In this patch, the cmdq_size value is set manually instead.
Remain consistent with previous IC.

Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
Changes in v4:
Add a comment per suggestion from the previous thread:
https://lore.kernel.org/all/14e03873-3723-8293-0190-445a71828b25@collabora.com/
Changes in v3:
reorder patch 2/3 and 3/3, and describe more about why mt8188 need this
patch,
per suggestion from the previous thread:
https://lore.kernel.org/lkml/411ddbf95e2c2298b84899065691d478069ec273.camel@mediatek.com/
Changes in v2:
use mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL); directly,
per suggestion from the previous thread:
https://lore.kernel.org/lkml/015f4c60-ed77-9e1f-8a6b-cda6e4f6ac93@gmail.com/
---
 drivers/gpu/drm/mediatek/mtk_dsi.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index d8bfc2cce54d..623aa829ef6b 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -86,6 +86,7 @@
 
 #define DSI_CMDQ_SIZE		0x60
 #define CMDQ_SIZE			0x3f
+#define CMDQ_SIZE_SEL		BIT(15)
 
 #define DSI_HSTX_CKL_WC		0x64
 
@@ -178,6 +179,7 @@ struct mtk_dsi_driver_data {
 	const u32 reg_cmdq_off;
 	bool has_shadow_ctl;
 	bool has_size_ctl;
+	bool cmdq_long_packet_ctl;
 };
 
 struct mtk_dsi {
@@ -996,6 +998,10 @@ static void mtk_dsi_cmdq(struct mtk_dsi *dsi, const struct mipi_dsi_msg *msg)
 
 	mtk_dsi_mask(dsi, reg_cmdq_off, cmdq_mask, reg_val);
 	mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE, cmdq_size);
+	if (dsi->driver_data->cmdq_long_packet_ctl) {
+		/* Disable setting cmdq_size automatically for long packets */
+		mtk_dsi_mask(dsi, DSI_CMDQ_SIZE, CMDQ_SIZE_SEL, CMDQ_SIZE_SEL);
+	}
 }
 
 static ssize_t mtk_dsi_host_send_cmd(struct mtk_dsi *dsi,
-- 
2.40.1

[PATCH v4,3/3] drm/mediatek: Add mt8188 dsi compatible to mtk_dsi.c

[Shuijing Li]

Add the compatible because there are different definitions for cmdq
register bit control in mt8188.

Signed-off-by: Shuijing Li <shuijing.li@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
Changes in v3:
reorder patch 2/3 and 3/3,
per suggestion from the previous thread:
https://lore.kernel.org/lkml/338122485db025f6bfb8be550d426ca11698497c.camel@mediatek.com/
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 ++
 drivers/gpu/drm/mediatek/mtk_dsi.c     | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 93552d76b6e7..034056d0f741 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -765,6 +765,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
 	  .data = (void *)MTK_DSI },
 	{ .compatible = "mediatek,mt8186-dsi",
 	  .data = (void *)MTK_DSI },
+	{ .compatible = "mediatek,mt8188-dsi",
+	  .data = (void *)MTK_DSI },
 	{ }
 };
 
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 623aa829ef6b..49bfc1dd11ae 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -1212,6 +1212,13 @@ static const struct mtk_dsi_driver_data mt8186_dsi_driver_data = {
 	.has_size_ctl = true,
 };
 
+static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
+	.reg_cmdq_off = 0xd00,
+	.has_shadow_ctl = true,
+	.has_size_ctl = true,
+	.cmdq_long_packet_ctl = true,
+};
+
 static const struct of_device_id mtk_dsi_of_match[] = {
 	{ .compatible = "mediatek,mt2701-dsi",
 	  .data = &mt2701_dsi_driver_data },
@@ -1221,6 +1228,8 @@ static const struct of_device_id mtk_dsi_of_match[] = {
 	  .data = &mt8183_dsi_driver_data },
 	{ .compatible = "mediatek,mt8186-dsi",
 	  .data = &mt8186_dsi_driver_data },
+	{ .compatible = "mediatek,mt8188-dsi",
+	  .data = &mt8188_dsi_driver_data },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, mtk_dsi_of_match);
-- 
2.40.1

Re: [PATCH v4,0/3] Add mt8188 compatiable for DSI cmd packet control

[CK Hu (胡俊光)]

Hi, Shuijing:

On Mon, 2023-09-11 at 20:07 +0800, Shuijing Li wrote:
> Add dt-binding documentation of DSI for MediaTek MT8188 SoC.
> Because of the difference between SOC and DSI cmd packet control, for
> MT8188, it is necessary to increase the DSI_CMDQ_SIZE control when
> sending long packets to initialize the panel. Of course, this will
> not
> affect the sending of short packets.
> 
> Base on the branch of linus/master v6.5.

For this series, applied. Thanks.

Regards,
CK

> 
> Shuijing Li (3):
>   dt-bindings: display: mediatek: dsi: Add compatible for MediaTek
>     MT8188
>   drm/mediatek: dsi: Add dsi cmdq_ctl to send panel initial code
>   drm/mediatek: Add mt8188 dsi compatible to mtk_dsi.c
> 
>  .../bindings/display/mediatek/mediatek,dsi.yaml   |  1 +
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c            |  2 ++
>  drivers/gpu/drm/mediatek/mtk_dsi.c                | 15
> +++++++++++++++
>  3 files changed, 18 insertions(+)
>