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 <[email protected]>
---
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
On 06.02.2018 09:42, Philippe Cornu wrote:
> 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 <[email protected]>
Reviewed-by: Andrzej Hajda <[email protected]>
If there will be no objections I will merge it this week.
--
Regards
Andrzej
On 06.02.2018 09:42, Philippe Cornu wrote:
> 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 <[email protected]>
Queued to drm-misc-next.
--
Regards
Andrzej
Many thanks
Philippe :-)
On 02/08/2018 08:39 AM, Andrzej Hajda wrote:
> On 06.02.2018 09:42, Philippe Cornu wrote:
>> 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 <[email protected]>
> Queued to drm-misc-next.
> --
> Regards
> Andrzej
>