Il 11/09/23 12:57, Shuijing Li ha scritto:
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@xxxxxxxxxxxx>
---
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@xxxxxxxxxxxx/
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@xxxxxxxxx/
---
drivers/gpu/drm/mediatek/mtk_dsi.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index d8bfc2cce54d..e83705394ada 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)
Please add a comment here, like:
/* Disable setting cmdq_size automatically for long packets */
after which
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
+ 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,
