Hi,

On 08/08/2017 12:35 PM, Mark yao wrote:
On 2017年07月07日 23:47, Jose Abreu wrote:
Hi Archit,


Ping, Any update for this patch? Can it be landed?

This patch actually needed for rk3399 hdmi support

Sorry, missed this one.

There was a comment from Laurent mentioning whether we'd want to
put the PHY version in DT. There wasn't any response to that.

However, it seems like this commit shouldn't hurt if we do decide
to put PHY versions in DT later. Queuing it to drm-misc-next.

Archit


Best Regards
Mark

On 23-06-2017 10:36, Jose Abreu wrote:
Currently HDMI 2.0 PHYs do not have a default configuration function.

As *some* of the HDMI 2.0 PHYs have the same register layout as the 3D
PHYs we can provide the same default configuration function for both
and still let user overwrite this with custom configuration function
if needed.

If, for some reason, the PHY is custom or has a register different
register layout then custom configuration function *must* be provided
in order for the system to work correctly. As we prefer the pdata
provided configuration function over the internal one this change
will not make any impact in custom platforms.

This patch is based on today's drm-misc-next branch.

Signed-off-by: Jose Abreu <joab...@synopsys.com>
Tested-by: Mark Yao <mark....@rock-chips.com>
This is needed for RK3399 support. Can you please apply it?

Best regards,
Jose Miguel Abreu

Cc: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
Cc: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
Cc: Archit Taneja <arch...@codeaurora.org>
Cc: Andrzej Hajda <a.ha...@samsung.com>
Cc: Mark Yao <mark....@rock-chips.com>
Cc: Carlos Palminha <palmi...@synopsys.com>
Cc: Heiko Stübner <he...@sntech.de>

Changes in v2:
    - Rebased and refrased commit message
---

Hi All,

There as been a little confusion about dw-hdmi phys so I will expand a little 
bit
here so that I can base my decision about this patch and why does it only works
in some platforms.

First, if you read dw-hdmi.c code, you will see that there is an identification
register for the phy type being used. Unfortunatelly, this only states the phy 
type
and not the phy version.

Second, we have many HDMI 2.0 phys (so, same phy type: 0xf3) but, as you may 
have guessed,
HW team decided to change regbank between some versions.

Third and last, each phy in a SoC has unique characteristics, so each phy 
(event if
they are the same version) will have different PLL configuration parameters.

Given all this I managed to conclude that Mark's phy is still an HDMI 2.0 phy 
but with
the same register layout as previous 3D PHY's. I found at least 2 phys with the 
same
register layout and only 1 phy which has a different layout, so I think 
majority wins
here and we should let the default configuration function for HDMI 2.0 phys be 
the same
one as the 3D.

Short story: There is no way to correctly identify, at runtime, the phy version 
being
used by the controller so we can't provide a default configuration function. We 
can,
however assume that most of the HDMI 2.0 phys will have the 3D layout BUT each 
developer
must confirm that the layout in its SoC is the expected one and if not, provide 
a custom
configuration function.

Best regards,
Jose Miguel Abreu

  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c 
b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index ead1124..10c8d8c 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2170,6 +2170,7 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
          .name = "DWC HDMI 2.0 TX PHY",
          .gen = 2,
          .has_svsret = true,
+        .configure = hdmi_phy_configure_dwc_hdmi_3d_tx,
      }, {
          .type = DW_HDMI_PHY_VENDOR_PHY,
          .name = "Vendor PHY",





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