Re: [PATCH v11 11/24] drm/rockchip: dw_hdmi: Use auto-generated tables

Tue, 03 May 2022 05:17:27 -0700 

On 2022-05-03 12:02, Heiko Stübner wrote:

Am Freitag, 22. April 2022, 09:28:28 CEST schrieb Sascha Hauer:

From: Douglas Anderson <diand...@chromium.org>

The previous tables for mpll_cfg and curr_ctrl were created using the
20-pages of example settings provided by the PHY vendor.  Those
example settings weren't particularly dense, so there were places
where we were guessing what the settings would be for 10-bit and
12-bit (not that we use those anyway).  It was also always a lot of
extra work every time we wanted to add a new clock rate since we had
to cross-reference several tables.

In <https://crrev.com/c/285855> I've gone through the work to figure
out how to generate this table automatically.  Let's now use the
automatically generated table and then we'll never need to look at it
again.

We only support 8-bit mode right now and only support a small number
of clock rates and I've verified that the only 8-bit rate that was
affected was 148.5.  That mode appears to have been wrong in the old
table.

Signed-off-by: Douglas Anderson <diand...@chromium.org>
Signed-off-by: Yakir Yang <y...@rock-chips.com>
Signed-off-by: Sascha Hauer <s.ha...@pengutronix.de>


This breaks hdmi on my rk3328-rock64 which then ends up in a
        [CRTC:37:crtc-0] vblank wait timed out

warning-loop.
Oh yeah, that... IIRC from back when I was looking at it, it's because the inno-hdmi phy does its own rate validation at a point when it's already far too late to actually reject the mode. It manages to work at the moment because its set of supported rates mostly line up with those for the Synopsys phy which dw-hdmi-rockchip still insists on validating against even when a vendor phy is present. 


Some part of the patch11-14 range also creates sparking horizontal
lines on my rk3288-pinky.
I figure that's the PLL jitter issue that's come up before. Similarly, when I last tried hacking in a 154MHz rate for my monitor's 1920x1200 mode, it was rock solid on RK3399, but intolerably glitchy on RK3288. 

Robin.


I haven't the time to dig overly deep into that, so left out the
hdmi-rate patches (11-14) for now.


Heiko



---

Notes:
     Changes since v5:
     - Add missing Signed-off-by me
Changes since v3: 
     - new patch

  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 130 +++++++++++---------
  1 file changed, 69 insertions(+), 61 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c 
b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index fe4f9556239ac..cb43e7b47157d 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -91,80 +91,88 @@ static struct rockchip_hdmi *to_rockchip_hdmi(struct 
drm_encoder *encoder)
static const struct dw_hdmi_mpll_config rockchip_mpll_cfg[] = { 
        {
-               27000000, {
-                       { 0x00b3, 0x0000},
-                       { 0x2153, 0x0000},
-                       { 0x40f3, 0x0000}
+               30666000, {
+                       { 0x00b3, 0x0000 },
+                       { 0x2153, 0x0000 },
+                       { 0x40f3, 0x0000 },
                },
-       }, {
-               36000000, {
-                       { 0x00b3, 0x0000},
-                       { 0x2153, 0x0000},
-                       { 0x40f3, 0x0000}
+       },  {
+               36800000, {
+                       { 0x00b3, 0x0000 },
+                       { 0x2153, 0x0000 },
+                       { 0x40a2, 0x0001 },
                },
-       }, {
-               40000000, {
-                       { 0x00b3, 0x0000},
-                       { 0x2153, 0x0000},
-                       { 0x40f3, 0x0000}
+       },  {
+               46000000, {
+                       { 0x00b3, 0x0000 },
+                       { 0x2142, 0x0001 },
+                       { 0x40a2, 0x0001 },
                },
-       }, {
-               54000000, {
-                       { 0x0072, 0x0001},
-                       { 0x2142, 0x0001},
-                       { 0x40a2, 0x0001},
+       },  {
+               61333000, {
+                       { 0x0072, 0x0001 },
+                       { 0x2142, 0x0001 },
+                       { 0x40a2, 0x0001 },
                },
-       }, {
-               65000000, {
-                       { 0x0072, 0x0001},
-                       { 0x2142, 0x0001},
-                       { 0x40a2, 0x0001},
+       },  {
+               73600000, {
+                       { 0x0072, 0x0001 },
+                       { 0x2142, 0x0001 },
+                       { 0x4061, 0x0002 },
                },
-       }, {
-               66000000, {
-                       { 0x013e, 0x0003},
-                       { 0x217e, 0x0002},
-                       { 0x4061, 0x0002}
+       },  {
+               92000000, {
+                       { 0x0072, 0x0001 },
+                       { 0x2145, 0x0002 },
+                       { 0x4061, 0x0002 },
                },
-       }, {
-               74250000, {
-                       { 0x0072, 0x0001},
-                       { 0x2145, 0x0002},
-                       { 0x4061, 0x0002}
+       },  {
+               122666000, {
+                       { 0x0051, 0x0002 },
+                       { 0x2145, 0x0002 },
+                       { 0x4061, 0x0002 },
                },
-       }, {
-               83500000, {
-                       { 0x0072, 0x0001},
+       },  {
+               147200000, {
+                       { 0x0051, 0x0002 },
+                       { 0x2145, 0x0002 },
+                       { 0x4064, 0x0003 },
                },
-       }, {
-               108000000, {
-                       { 0x0051, 0x0002},
-                       { 0x2145, 0x0002},
-                       { 0x4061, 0x0002}
+       },  {
+               184000000, {
+                       { 0x0051, 0x0002 },
+                       { 0x214c, 0x0003 },
+                       { 0x4064, 0x0003 },
                },
-       }, {
-               106500000, {
-                       { 0x0051, 0x0002},
-                       { 0x2145, 0x0002},
-                       { 0x4061, 0x0002}
+       },  {
+               226666000, {
+                       { 0x0040, 0x0003 },
+                       { 0x214c, 0x0003 },
+                       { 0x4064, 0x0003 },
                },
-       }, {
-               146250000, {
-                       { 0x0051, 0x0002},
-                       { 0x2145, 0x0002},
-                       { 0x4061, 0x0002}
+       },  {
+               272000000, {
+                       { 0x0040, 0x0003 },
+                       { 0x214c, 0x0003 },
+                       { 0x5a64, 0x0003 },
                },
-       }, {
-               148500000, {
-                       { 0x0051, 0x0003},
-                       { 0x214c, 0x0003},
-                       { 0x4064, 0x0003}
+       },  {
+               340000000, {
+                       { 0x0040, 0x0003 },
+                       { 0x3b4c, 0x0003 },
+                       { 0x5a64, 0x0003 },
                },
-       }, {
+       },  {
+               600000000, {
+                       { 0x1a40, 0x0003 },
+                       { 0x3b4c, 0x0003 },
+                       { 0x5a64, 0x0003 },
+               },
+       },  {
                ~0UL, {
-                       { 0x00a0, 0x000a },
-                       { 0x2001, 0x000f },
-                       { 0x4002, 0x000f },
+                       { 0x0000, 0x0000 },
+                       { 0x0000, 0x0000 },
+                       { 0x0000, 0x0000 },
                },
        }
  };







_______________________________________________
Linux-rockchip mailing list
linux-rockc...@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip

Reply via email to