linux-kernel - [PATCH v2,3/3] drm/mediatek: dsi: Add dsi cmdq

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Date:   Fri, 16 Jun 2023 15:36:59 +0800
From:   Shuijing Li <shuijing.li@...iatek.com>
To:     <chunkuang.hu@...nel.org>, <p.zabel@...gutronix.de>,
        <airlied@...il.com>, <daniel@...ll.ch>, <matthias.bgg@...il.com>,
        <angelogioacchino.delregno@...labora.com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>
CC:     <devicetree@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        <jitao.shi@...iatek.com>, Shuijing Li <shuijing.li@...iatek.com>
Subject: [PATCH v2,3/3] drm/mediatek: dsi: Add dsi cmdq_ctl to send panel initial code

For mt8188, add dsi cmdq reg control to send long packets to panel
initialization.

Signed-off-by: Shuijing Li <shuijing.li@...iatek.com>
Signed-off-by: Jitao Shi <jitao.shi@...iatek.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 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 500a3054282d..8b43d9f48178 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 +998,8 @@ 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)
+		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,
@@ -1200,18 +1204,21 @@ static const struct mtk_dsi_driver_data mt8183_dsi_driver_data = {
 	.reg_cmdq_off = 0x200,
 	.has_shadow_ctl = true,
 	.has_size_ctl = true,
+	.cmdq_long_packet_ctl = false,
 };
 
 static const struct mtk_dsi_driver_data mt8186_dsi_driver_data = {
 	.reg_cmdq_off = 0xd00,
 	.has_shadow_ctl = true,
 	.has_size_ctl = true,
+	.cmdq_long_packet_ctl = false,
 };
 
 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[] = {
-- 
2.40.1