| Message ID | 1519822318-3974-1-git-send-email-giulio.benetti@micronovasrl.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Wed, Feb 28, 2018 at 01:51:58PM +0100, Giulio Benetti wrote: > sun4i_dclk_round_rate is called before sun4i_tcon_mode_set, > so it finds dclk_min_div and dclk_max_div set to 0 and fails > adding crtc. > > Move dclk_min_div and dclk_max_div to encoders init functions. > > Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com> I sent a similar patch there: https://lists.freedesktop.org/archives/dri-devel/2018-February/166666.html I guess eventually, we'll want to remove the usage of the clock framework entirely, but it's not really the scope of a fix. Maxime
Hi, Il 28/02/2018 16:55, Maxime Ripard ha scritto: > Hi, > > On Wed, Feb 28, 2018 at 01:51:58PM +0100, Giulio Benetti wrote: >> sun4i_dclk_round_rate is called before sun4i_tcon_mode_set, >> so it finds dclk_min_div and dclk_max_div set to 0 and fails >> adding crtc. >> >> Move dclk_min_div and dclk_max_div to encoders init functions. >> >> Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com> > > I sent a similar patch there: > https://lists.freedesktop.org/archives/dri-devel/2018-February/166666.html I've missed that. And where you put it is better, since it's called every time set_mode is called. On lvds instead I don't see anything about this, it should have the same potential problem. Also I can't understand why it has been set min=7 and max=7 on lvds. With those values I would obtain 77Mhz only. And I can't find values on datasheet for minimum and maximum. > > I guess eventually, we'll want to remove the usage of the clock > framework entirely, but it's not really the scope of a fix. Where would you handle dclk instead of tcon? Thanks
Hi, Il 28/02/2018 17:34, Giulio Benetti ha scritto: > Hi, > > Il 28/02/2018 16:55, Maxime Ripard ha scritto: >> Hi, >> >> On Wed, Feb 28, 2018 at 01:51:58PM +0100, Giulio Benetti wrote: >>> sun4i_dclk_round_rate is called before sun4i_tcon_mode_set, >>> so it finds dclk_min_div and dclk_max_div set to 0 and fails >>> adding crtc. >>> >>> Move dclk_min_div and dclk_max_div to encoders init functions. >>> >>> Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com> >> >> I sent a similar patch there: >> https://lists.freedesktop.org/archives/dri-devel/2018-February/166666.html >> > > I've missed that. > And where you put it is better, since it's called every time set_mode is > called. > > On lvds instead I don't see anything about this, > it should have the same potential problem. > Also I can't understand why it has been set min=7 and max=7 on lvds. > With those values I would obtain 77Mhz only. > And I can't find values on datasheet for minimum and maximum. Submitted patchset for that. > >> >> I guess eventually, we'll want to remove the usage of the clock >> framework entirely, but it's not really the scope of a fix. > > Where would you handle dclk instead of tcon? Don't mind.
diff --git a/drivers/gpu/drm/sun4i/sun4i_lvds.c b/drivers/gpu/drm/sun4i/sun4i_lvds.c index be3f14d..6e1abd6 100644 --- a/drivers/gpu/drm/sun4i/sun4i_lvds.c +++ b/drivers/gpu/drm/sun4i/sun4i_lvds.c @@ -123,6 +123,10 @@ int sun4i_lvds_init(struct drm_device *drm, struct sun4i_tcon *tcon) return 0; } + /* Init min and max clock divisor according to LVDS encoder */ + tcon->dclk_min_div = 7; + tcon->dclk_max_div = 7; + drm_encoder_helper_add(&lvds->encoder, &sun4i_lvds_enc_helper_funcs); ret = drm_encoder_init(drm, diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c index 832f8f9..75ab3e5 100644 --- a/drivers/gpu/drm/sun4i/sun4i_rgb.c +++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c @@ -187,6 +187,10 @@ int sun4i_rgb_init(struct drm_device *drm, struct sun4i_tcon *tcon) return 0; } + /* Init min and max clock divisor according to RGB encoder */ + tcon->dclk_min_div = 6; + tcon->dclk_max_div = 127; + drm_encoder_helper_add(&rgb->encoder, &sun4i_rgb_enc_helper_funcs); ret = drm_encoder_init(drm, diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index e7c5e3c..ce89fd4 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -277,8 +277,6 @@ static void sun4i_tcon0_mode_set_lvds(struct sun4i_tcon *tcon, u8 clk_delay; u32 reg, val = 0; - tcon->dclk_min_div = 7; - tcon->dclk_max_div = 7; sun4i_tcon0_mode_set_common(tcon, mode); /* Adjust clock delay */ @@ -348,8 +346,6 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon, u8 clk_delay; u32 val = 0; - tcon->dclk_min_div = 6; - tcon->dclk_max_div = 127; sun4i_tcon0_mode_set_common(tcon, mode); /* Adjust clock delay */
sun4i_dclk_round_rate is called before sun4i_tcon_mode_set, so it finds dclk_min_div and dclk_max_div set to 0 and fails adding crtc. Move dclk_min_div and dclk_max_div to encoders init functions. Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com> --- drivers/gpu/drm/sun4i/sun4i_lvds.c | 4 ++++ drivers/gpu/drm/sun4i/sun4i_rgb.c | 4 ++++ drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 ---- 3 files changed, 8 insertions(+), 4 deletions(-)