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drm/rockchip: dsi: support EoTp feature

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In order to enhance the overall robustness of the system, DSI defines
a dedicated EoT packet (EoTp) at the protocol layer for signaling
the end of HS transmission. For backwards compatibility with earlier
DSI systems, the capability of generating and interpreting this EoTp
can be enabled or disabled.

Change-Id: Iddc7e82a7e3e47dea94846fbb771da8fddc0fda3
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
This commit is contained in:
Wyon Bi 2018-09-14 11:53:25 +08:00 committed by Tao Huang
parent 628af73a51
commit fca44d3e4e
1 changed files with 11 additions and 7 deletions
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18
drivers/gpu/drm/rockchip/dw-mipi-dsi.c
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@ -74,11 +74,11 @@
#define DSI_DBI_CMDSIZE 0x28
#define DSI_PCKHDL_CFG 0x2c
#define EN_CRC_RX BIT(4)
#define EN_ECC_RX BIT(3)
#define EN_BTA BIT(2)
#define EN_EOTP_RX BIT(1)
#define EN_EOTP_TX BIT(0)
#define CRC_RX_EN BIT(4)
#define ECC_RX_EN BIT(3)
#define BTA_EN BIT(2)
#define EOTP_RX_EN BIT(1)
#define EOTP_TX_EN BIT(0)
#define DSI_MODE_CFG 0x34
#define ENABLE_VIDEO_MODE 0
@ -1083,8 +1083,12 @@ static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
{
regmap_write(dsi->regmap, DSI_PCKHDL_CFG,
EN_CRC_RX | EN_ECC_RX | EN_BTA);
u32 val = CRC_RX_EN | ECC_RX_EN | BTA_EN | EOTP_TX_EN;
if (dsi->mode_flags & MIPI_DSI_MODE_EOT_PACKET)
val &= ~EOTP_TX_EN;
regmap_write(dsi->regmap, DSI_PCKHDL_CFG, val);
}
static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,