Re: [PATCH v10 11/11] drm: bridge/dw_hdmi: add rockchip rk3288 support

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On 2014年11月14日 19:16, Zubair Lutfullah Kakakhel wrote:

On 14/11/14 11:13, Andy Yan wrote:
On 2014年11月14日 18:53, Zubair Lutfullah Kakakhel wrote:
On 14/11/14 10:37, Andy Yan wrote:
On 2014年11月14日 18:23, Zubair Lutfullah Kakakhel wrote:
Hi Andy

On 14/11/14 03:31, Andy Yan wrote:
Rockchip RK3288 hdmi is compatible with dw_hdmi

Signed-off-by: Andy Yan <andy.yan@xxxxxxxxxxxxxx>

---

Changes in v10:
- add more display mode support mpll configuration for rk3288

Changes in v9:
- move some phy configuration to platform driver

Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

    drivers/gpu/drm/bridge/dw_hdmi.c            |  10 +
    drivers/gpu/drm/bridge/dw_hdmi.h            |   3 +-
    drivers/gpu/drm/rockchip/Kconfig            |  10 +
    drivers/gpu/drm/rockchip/Makefile           |   2 +-
    drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 355 ++++++++++++++++++++++++++++
    include/drm/bridge/dw_hdmi.h                |   1 +
    6 files changed, 379 insertions(+), 2 deletions(-)
    create mode 100644 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index a2876fe..1dd1f0b 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -715,6 +715,13 @@ static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable)
                 HDMI_PHY_CONF0_ENTMDS_MASK);
    }
    +static void dw_hdmi_phy_enable_spare(struct dw_hdmi *hdmi, u8 enable)
+{
+    hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
+             HDMI_PHY_CONF0_SPARECTRL_OFFSET,
+             HDMI_PHY_CONF0_SPARECTRL_MASK);
+}
+
What does enable spare do? Can other future SoCs use it?

This looks like DW specific. And can be a separate commit that adds a feature to the dw hdmi driver.
    Actually I am not very clearly about this bit, but RK3288 HDMI will not work without this bit enable.
    On imx6, the description about this bit is:Reserved. Spare pin control.
    On rk3288, the description is: svsret/sparectrl
     Both are very simple.
Sounds like the IP Core in the rk3288 is slightly upgraded.
Separate this section in a different commit as it is generic DW stuff.

And add what you wrote above in the commit message.
   Only Separate function dw_hdmi_phy_enale_spare ? not include
   if (hdmi->dev_type == rk3288_hdmi)
                dw_hdmi_enable_phy_spare(hdmi, 1);
  ?
Yes. Separate dw_hdmi_phy_enable_spare and its associated defines
  HDMI_PHY_CONF0_SPARECTRL_OFFSET
  HDMI_PHY_CONF0_SPARECTRL_MASK
  in the header
as one commit.


The if (hdmi->dev_type == rk3288_hdmi) code is part of the add rk3288 support.

ZubairLK
  Many thanks :-)
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