modetest should be printing "freq: 60.0Hz", so definitely something
wrong there. Though I guess you have another problem since I would
expect the patch to drop it to 30 and not 13.5.
(FYI glmark-x11 isn't vsynced which is why I specifically mentioned
glmark-drm)
On 3/3/20 9:16 PM, Brian Masney wrote:
On Tue, Mar 03, 2020 at 08:04:05AM -0500, Jonathan Marek wrote:
What Xorg prints doesn't mean anything. I don't think there will be errors
in dmesg, you need to run something that does pageflips as fast as possible
and see that the refresh rate is still 60. (modetest with -v, glmark-drm are
examples)
I assume that you mean modetest from
https://gitlab.freedesktop.org/mesa/drm/tree/master/tests/modetest ?
Here's the modeset connector information:
id encoder status name size (mm) modes encoders
32 31 connected DSI-1 62x110 1 31
modes:
index name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot)
#0 1080x1920 71.71 1080 1082 1084 1086 1920 1922 1924 1926 150000
flags: ; type: preferred, driver
And the page flip results...
$ modetest -v -s 32:1080x1920
trying to open device 'msm'...done
setting mode 1080x1920-71.71Hz@XR24 on connectors 32, crtc 50
failed to set gamma: Function not implemented
freq: 13.50Hz
freq: 13.51Hz
freq: 13.51Hz
It's the same results with and without Ville's patch.
Here's the beginning of the glmark2 results with the x11-gl flavor:
=======================================================
glmark2 2017.07
=======================================================
OpenGL Information
GL_VENDOR: freedreno
GL_RENDERER: FD330
GL_VERSION: 3.1 Mesa 20.0.0-devel
=======================================================
[build] use-vbo=false: FPS: 26 FrameTime: 38.462 ms
[build] use-vbo=true: FPS: 26 FrameTime: 38.462 ms
[texture] texture-filter=nearest: FPS: 26 FrameTime: 38.462 ms
[texture] texture-filter=linear: FPS: 26 FrameTime: 38.462 ms
[texture] texture-filter=mipmap: FPS: 27 FrameTime: 37.037 ms
[shading] shading=gouraud: FPS: 27 FrameTime: 37.037 ms
[shading] shading=blinn-phong-inf: FPS: 27 FrameTime: 37.037 ms
[shading] shading=phong: FPS: 27 FrameTime: 37.037 ms
[shading] shading=cel: FPS: 26 FrameTime: 38.462 ms
[bump] bump-render=high-poly: FPS: 27 FrameTime: 37.037 ms
[bump] bump-render=normals: FPS: 27 FrameTime: 37.037 ms
[bump] bump-render=height: FPS: 27 FrameTime: 37.037 ms
[effect2d] kernel=0,1,0;1,-4,1;0,1,0;: FPS: 25 FrameTime: 40.000 ms
[effect2d] kernel=1,1,1,1,1;1,1,1,1,1;1,1,1,1,1;: FPS: 26 FrameTime:
38.462 ms
[pulsar] light=false:quads=5:texture=false: FPS: 26 FrameTime: 38.462 ms
[desktop] blur-radius=5:effect=blur:passes=1:separable=true:windows=4:
FPS: 26 FrameTime: 38.462 ms
[desktop] effect=shadow:windows=4: FPS: 27 FrameTime: 37.037 ms
...
Brian
On 3/3/20 7:26 AM, Brian Masney wrote:
On Mon, Mar 02, 2020 at 10:36:54PM -0500, Jonathan Marek wrote:
Another thing: did you verify that the panel still runs at 60hz (and not
dropping frames to 30hz)? IIRC that was the behavior with lower clock.
Yes, the panel is running at 60 HZ according to the Xorg log with
Ville's patch applied:
modeset(0): Modeline "1080x1920"x60.0 125.50 1080 1082 1084 1086
1920 1922 1924 1926 (115.6 kHz eP)
I verified there's no underflow errors in dmesg.
If I recall correctly, the clock speeds that was in your tree was set
too low for the gpu_opp_table (that wouldn't cause this issue), but I
seem to recall there were some other clock speed mismatches. The
bandwidth requests weren't set on the RPM as well, so maybe that
contributed to the problem. That's done upstream with the msm8974
interconnect driver:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/interconnect/qcom/msm8974.c
There's a separate known issue with 'pp done time out' errors that
occur on the framebuffer that started upstream several months ago with
the introduction of async commit support in the MSM driver. I tried
working around this by enabling the autorefresh feature but it's not
fully working yet and I hit a dead end since there's no docs available
publicly for this. The grim details are at:
https://lore.kernel.org/lkml/20191230020053.26016-2-masneyb@xxxxxxxxxxxxx/
So I'm still OK with Ville's patch going in.
Brian
On 3/2/20 10:28 PM, Jonathan Marek wrote:
On 3/2/20 10:13 PM, Brian Masney wrote:
On Mon, Mar 02, 2020 at 03:48:22PM -0500, Jonathan Marek wrote:
Hi,
This is a command mode panel and the the msm/mdp5 driver uses
the vrefresh
field for the actual refresh rate, while the dotclock field is
used for the
DSI clocks. The dotclock needed to be a bit higher than
necessary otherwise
the panel would not work.
If you want to get rid of the separate clock/vrefresh fields there would
need to be some changes to msm driver.
(note I hadn't made the patch with upstreaming in mind, the
150000 value is
likely not optimal, just something that worked, this is something that
should have been checked with the downstream driver)
Is this the right clock frequency in the downstream MSM 3.4 kernel that
you're talking about?
https://github.com/AICP/kernel_lge_hammerhead/blob/n7.1/arch/arm/mach-msm/clock-8974.c#L3326
No, I'm talking about the DSI clock (the driver for it is in
drm/msm/dsi/). For a command mode panel the front/back porches aren't
relevant, but the dsi pixel/byte clock need to be a bit higher than
1920x1080x60. Since 125498 is a little higher than 124416 that might be
enough (there is also rounding of the clock values to consider).
I don't see any obvious clock values in the downstream command mode
panel configuration:
https://github.com/AICP/kernel_lge_hammerhead/blob/n7.1/arch/arm/boot/dts/msm8974-hammerhead/msm8974-hammerhead-panel.dtsi#L591
Anyways, I tried Ville's patch with the framebuffer, kmscube, and X11
and everything appears to be working fine. You can add my Tested-by if
you end up applying this.
Tested-by: Brian Masney <masneyb@xxxxxxxxxxxxx>
Brian
On 3/2/20 3:34 PM, Ville Syrjala wrote:
From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
The currently listed dotclock disagrees with the currently
listed vrefresh rate. Change the dotclock to match the vrefresh.
Someone tell me which (if either) of the dotclock or vreresh is
correct?
Cc: Jonathan Marek <jonathan@xxxxxxxx>
Cc: Brian Masney <masneyb@xxxxxxxxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/panel/panel-simple.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panel/panel-simple.c
b/drivers/gpu/drm/panel/panel-simple.c
index b24fdf239440..f958d8dfd760 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -3996,7 +3996,7 @@ static const struct panel_desc_dsi
panasonic_vvx10f004b00 = {
};
static const struct drm_display_mode lg_acx467akm_7_mode = {
- .clock = 150000,
+ .clock = 125498,
.hdisplay = 1080,
.hsync_start = 1080 + 2,
.hsync_end = 1080 + 2 + 2,
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