lkml.org 
[lkml]   [2018]   [Feb]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2] drm/bridge/synopsys: dsi: Add 1.31 version support
Date
Add support for the Synopsys DesignWare MIPI DSI version 1.31
Two registers need to be updated/added for supporting 1.31:
* PHY_TMR_CFG 0x9c (updated)
1.30 [31:24] phy_hs2lp_time
[23:16] phy_lp2hs_time
[14: 0] max_rd_time

1.31 [25:16] phy_hs2lp_time
[ 9: 0] phy_lp2hs_time

* PHY_TMR_RD_CFG 0xf4 (new)
1.31 [14: 0] max_rd_time

Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
---
Modified in v2: Simplify the code thanks to comments from Andrzej Hajda &
Archit Taneja.

drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 23 ++++++++++++++++++++---
1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index d2e5c026cd8c..4496687e6e67 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -25,7 +25,10 @@
#include <drm/bridge/dw_mipi_dsi.h>
#include <video/mipi_display.h>

+#define HWVER_131 0x31333100 /* IP version 1.31 */
+
#define DSI_VERSION 0x00
+#define VERSION GENMASK(31, 8)

#define DSI_PWR_UP 0x04
#define RESET 0
@@ -161,11 +164,12 @@
#define PHY_CLKHS2LP_TIME(lbcc) (((lbcc) & 0x3ff) << 16)
#define PHY_CLKLP2HS_TIME(lbcc) ((lbcc) & 0x3ff)

-/* TODO Next register is slightly different between 1.30 & 1.31 IP version */
#define DSI_PHY_TMR_CFG 0x9c
#define PHY_HS2LP_TIME(lbcc) (((lbcc) & 0xff) << 24)
#define PHY_LP2HS_TIME(lbcc) (((lbcc) & 0xff) << 16)
#define MAX_RD_TIME(lbcc) ((lbcc) & 0x7fff)
+#define PHY_HS2LP_TIME_V131(lbcc) (((lbcc) & 0x3ff) << 16)
+#define PHY_LP2HS_TIME_V131(lbcc) ((lbcc) & 0x3ff)

#define DSI_PHY_RSTZ 0xa0
#define PHY_DISFORCEPLL 0
@@ -204,7 +208,9 @@
#define DSI_INT_ST1 0xc0
#define DSI_INT_MSK0 0xc4
#define DSI_INT_MSK1 0xc8
+
#define DSI_PHY_TMR_RD_CFG 0xf4
+#define MAX_RD_TIME_V131(lbcc) ((lbcc) & 0x7fff)

#define PHY_STATUS_TIMEOUT_US 10000
#define CMD_PKT_STATUS_TIMEOUT_US 20000
@@ -623,6 +629,8 @@ static void dw_mipi_dsi_vertical_timing_config(struct dw_mipi_dsi *dsi,

static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi)
{
+ u32 hw_version;
+
/*
* TODO dw drv improvements
* data & clock lane timers should be computed according to panel
@@ -630,8 +638,17 @@ static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi)
* note: DSI_PHY_TMR_CFG.MAX_RD_TIME should be in line with
* DSI_CMD_MODE_CFG.MAX_RD_PKT_SIZE_LP (see CMD_MODE_ALL_LP)
*/
- dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME(0x40)
- | PHY_LP2HS_TIME(0x40) | MAX_RD_TIME(10000));
+
+ hw_version = dsi_read(dsi, DSI_VERSION) & VERSION;
+
+ if (hw_version >= HWVER_131) {
+ dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME_V131(0x40) |
+ PHY_LP2HS_TIME_V131(0x40));
+ dsi_write(dsi, DSI_PHY_TMR_RD_CFG, MAX_RD_TIME_V131(10000));
+ } else {
+ dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME(0x40) |
+ PHY_LP2HS_TIME(0x40) | MAX_RD_TIME(10000));
+ }

dsi_write(dsi, DSI_PHY_TMR_LPCLK_CFG, PHY_CLKHS2LP_TIME(0x40)
| PHY_CLKLP2HS_TIME(0x40));
--
2.15.1
\
 
 \ /
  Last update: 2018-02-06 09:44    [W:0.052 / U:3.872 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site