| Message ID | 20170926065919.24446-4-wens@csie.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
Hi, On Tue, Sep 26, 2017 at 06:59:09AM +0000, Chen-Yu Tsai wrote: > On systems with 2 TCONs such as the A31, it is possible to demux the > output of the TCONs to one encoder. > > Add support for this for the A31. > > Signed-off-by: Chen-Yu Tsai <wens@csie.org> > --- > drivers/gpu/drm/sun4i/sun4i_tcon.c | 61 ++++++++++++++++++++++++++++++++++++++ > 1 file changed, 61 insertions(+) > > diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c > index e853dfe51389..770b843a6fa9 100644 > --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c > +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c > @@ -14,9 +14,12 @@ > #include <drm/drm_atomic_helper.h> > #include <drm/drm_crtc.h> > #include <drm/drm_crtc_helper.h> > +#include <drm/drm_encoder.h> > #include <drm/drm_modes.h> > #include <drm/drm_of.h> > > +#include <uapi/drm/drm_mode.h> > + > #include <linux/component.h> > #include <linux/ioport.h> > #include <linux/of_address.h> > @@ -109,11 +112,69 @@ void sun4i_tcon_enable_vblank(struct sun4i_tcon *tcon, bool enable) > } > EXPORT_SYMBOL(sun4i_tcon_enable_vblank); > > +static struct sun4i_tcon *sun4i_get_first_tcon(struct drm_device *drm) > +{ > + struct sun4i_drv *drv = drm->dev_private; > + struct sun4i_tcon *tcon; > + > + list_for_each_entry(tcon, &drv->tcon_list, list) > + if (tcon->id == 0) > + return tcon; > + > + dev_warn(drm->dev, > + "TCON0 not found, display output muxing may not work\n"); > + > + return tcon; > +} > + > +static int _sun6i_tcon_set_mux(struct drm_encoder *encoder) > +{ > + struct sun4i_tcon *tcon = sun4i_get_first_tcon(encoder->dev); > + int tcon_id = drm_crtc_to_sun4i_crtc(encoder->crtc)->tcon->id; > + u32 shift; > + > + DRM_DEBUG_DRIVER("Muxing encoder %s to CRTC %s (TCON %d)\n", > + encoder->name, encoder->crtc->name, tcon_id); > + > + /* Only 2 TCONs */ > + if (tcon_id >= 2) > + return -EINVAL; > + > + switch (encoder->encoder_type) { > + case DRM_MODE_ENCODER_TMDS: > + /* HDMI */ > + shift = 8; > + break; > + case DRM_MODE_ENCODER_DSI: > + /* No MIPI DSI on A31s */ > + if (of_device_is_compatible(tcon->dev->of_node, > + "allwinner,sun6i-a31s-tcon")) I'm not sure that test is needed. We won't end up in that case if we don't have a connected DSI block, which isn't going to be the case on the A31. And I guess we can tackle DSI later (when I'll send my patches...). > + return -EINVAL; > + shift = 0; > + break; > + default: > + return -EINVAL; > + } > + > + regmap_update_bits(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, > + 0x3 << shift, tcon_id << shift); > + > + return 0; > +} > + > void sun4i_tcon_set_mux(struct sun4i_tcon *tcon, int channel, > struct drm_encoder *encoder) > { > + /* Get the device node of the display engine */ > + struct device_node *node = encoder->dev->dev->of_node; > u32 val; > > + if (of_device_is_compatible(node, "allwinner,sun6i-a31-display-engine") || > + of_device_is_compatible(node, "allwinner,sun6i-a31s-display-engine")) { > + _sun6i_tcon_set_mux(encoder); > + return; > + } > + I'd really like to avoid mix and matching the structure defined behaviour and those of_device_is_compatible calls spread out everywhere. You can either add a flag or a function pointer. Maxime
On Tue, Sep 26, 2017 at 5:56 PM, Maxime Ripard <maxime.ripard@free-electrons.com> wrote: > Hi, > > On Tue, Sep 26, 2017 at 06:59:09AM +0000, Chen-Yu Tsai wrote: >> On systems with 2 TCONs such as the A31, it is possible to demux the >> output of the TCONs to one encoder. >> >> Add support for this for the A31. >> >> Signed-off-by: Chen-Yu Tsai <wens@csie.org> >> --- >> drivers/gpu/drm/sun4i/sun4i_tcon.c | 61 ++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 61 insertions(+) >> >> diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c >> index e853dfe51389..770b843a6fa9 100644 >> --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c >> +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c >> @@ -14,9 +14,12 @@ >> #include <drm/drm_atomic_helper.h> >> #include <drm/drm_crtc.h> >> #include <drm/drm_crtc_helper.h> >> +#include <drm/drm_encoder.h> >> #include <drm/drm_modes.h> >> #include <drm/drm_of.h> >> >> +#include <uapi/drm/drm_mode.h> >> + >> #include <linux/component.h> >> #include <linux/ioport.h> >> #include <linux/of_address.h> >> @@ -109,11 +112,69 @@ void sun4i_tcon_enable_vblank(struct sun4i_tcon *tcon, bool enable) >> } >> EXPORT_SYMBOL(sun4i_tcon_enable_vblank); >> >> +static struct sun4i_tcon *sun4i_get_first_tcon(struct drm_device *drm) >> +{ >> + struct sun4i_drv *drv = drm->dev_private; >> + struct sun4i_tcon *tcon; >> + >> + list_for_each_entry(tcon, &drv->tcon_list, list) >> + if (tcon->id == 0) >> + return tcon; >> + >> + dev_warn(drm->dev, >> + "TCON0 not found, display output muxing may not work\n"); >> + >> + return tcon; >> +} >> + >> +static int _sun6i_tcon_set_mux(struct drm_encoder *encoder) >> +{ >> + struct sun4i_tcon *tcon = sun4i_get_first_tcon(encoder->dev); >> + int tcon_id = drm_crtc_to_sun4i_crtc(encoder->crtc)->tcon->id; >> + u32 shift; >> + >> + DRM_DEBUG_DRIVER("Muxing encoder %s to CRTC %s (TCON %d)\n", >> + encoder->name, encoder->crtc->name, tcon_id); >> + >> + /* Only 2 TCONs */ >> + if (tcon_id >= 2) >> + return -EINVAL; >> + >> + switch (encoder->encoder_type) { >> + case DRM_MODE_ENCODER_TMDS: >> + /* HDMI */ >> + shift = 8; >> + break; >> + case DRM_MODE_ENCODER_DSI: >> + /* No MIPI DSI on A31s */ >> + if (of_device_is_compatible(tcon->dev->of_node, >> + "allwinner,sun6i-a31s-tcon")) > > I'm not sure that test is needed. > > We won't end up in that case if we don't have a connected DSI block, > which isn't going to be the case on the A31. And I guess we can tackle > DSI later (when I'll send my patches...). OK. I'll leave a comment instead. > >> + return -EINVAL; >> + shift = 0; >> + break; >> + default: >> + return -EINVAL; >> + } >> + >> + regmap_update_bits(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, >> + 0x3 << shift, tcon_id << shift); >> + >> + return 0; >> +} >> + >> void sun4i_tcon_set_mux(struct sun4i_tcon *tcon, int channel, >> struct drm_encoder *encoder) >> { >> + /* Get the device node of the display engine */ >> + struct device_node *node = encoder->dev->dev->of_node; >> u32 val; >> >> + if (of_device_is_compatible(node, "allwinner,sun6i-a31-display-engine") || >> + of_device_is_compatible(node, "allwinner,sun6i-a31s-display-engine")) { >> + _sun6i_tcon_set_mux(encoder); >> + return; >> + } >> + > > I'd really like to avoid mix and matching the structure defined > behaviour and those of_device_is_compatible calls spread out > everywhere. > > You can either add a flag or a function pointer. Function pointer it is! ChenYu -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index e853dfe51389..770b843a6fa9 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -14,9 +14,12 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> +#include <drm/drm_encoder.h> #include <drm/drm_modes.h> #include <drm/drm_of.h> +#include <uapi/drm/drm_mode.h> + #include <linux/component.h> #include <linux/ioport.h> #include <linux/of_address.h> @@ -109,11 +112,69 @@ void sun4i_tcon_enable_vblank(struct sun4i_tcon *tcon, bool enable) } EXPORT_SYMBOL(sun4i_tcon_enable_vblank); +static struct sun4i_tcon *sun4i_get_first_tcon(struct drm_device *drm) +{ + struct sun4i_drv *drv = drm->dev_private; + struct sun4i_tcon *tcon; + + list_for_each_entry(tcon, &drv->tcon_list, list) + if (tcon->id == 0) + return tcon; + + dev_warn(drm->dev, + "TCON0 not found, display output muxing may not work\n"); + + return tcon; +} + +static int _sun6i_tcon_set_mux(struct drm_encoder *encoder) +{ + struct sun4i_tcon *tcon = sun4i_get_first_tcon(encoder->dev); + int tcon_id = drm_crtc_to_sun4i_crtc(encoder->crtc)->tcon->id; + u32 shift; + + DRM_DEBUG_DRIVER("Muxing encoder %s to CRTC %s (TCON %d)\n", + encoder->name, encoder->crtc->name, tcon_id); + + /* Only 2 TCONs */ + if (tcon_id >= 2) + return -EINVAL; + + switch (encoder->encoder_type) { + case DRM_MODE_ENCODER_TMDS: + /* HDMI */ + shift = 8; + break; + case DRM_MODE_ENCODER_DSI: + /* No MIPI DSI on A31s */ + if (of_device_is_compatible(tcon->dev->of_node, + "allwinner,sun6i-a31s-tcon")) + return -EINVAL; + shift = 0; + break; + default: + return -EINVAL; + } + + regmap_update_bits(tcon->regs, SUN4I_TCON_MUX_CTRL_REG, + 0x3 << shift, tcon_id << shift); + + return 0; +} + void sun4i_tcon_set_mux(struct sun4i_tcon *tcon, int channel, struct drm_encoder *encoder) { + /* Get the device node of the display engine */ + struct device_node *node = encoder->dev->dev->of_node; u32 val; + if (of_device_is_compatible(node, "allwinner,sun6i-a31-display-engine") || + of_device_is_compatible(node, "allwinner,sun6i-a31s-display-engine")) { + _sun6i_tcon_set_mux(encoder); + return; + } + if (!tcon->quirks->has_unknown_mux) return;
On systems with 2 TCONs such as the A31, it is possible to demux the output of the TCONs to one encoder. Add support for this for the A31. Signed-off-by: Chen-Yu Tsai <wens@csie.org> --- drivers/gpu/drm/sun4i/sun4i_tcon.c | 61 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+)