[PATCH v3 1/3] drm/bridge: nwl-dsi: Force a full modeset when crtc_state->active is changed to be true
Liu Ying
victor.liu at nxp.com
Fri Apr 30 11:45:53 UTC 2021
Hi Robert,
On Fri, 2021-04-30 at 11:56 +0200, Robert Foss wrote:
> Hey Liu,
>
> This patch does not apply on upstream-drm-misc/drm-misc-next. When it
> passes local testing & building, I'm ready to merge it.
I see Neil has already pushed this entire patch series to
drm-misc-next.
https://cgit.freedesktop.org/drm/drm-misc/commit/?id=885811372fe101c4299c53eecc9fee72cf927a0c
I also see Guido's R-b and T-b tags on this series, though they comes
after Neil's push perhaps.
Thanks,
Liu Ying
>
> On Fri, 23 Apr 2021 at 11:42, Liu Ying <victor.liu at nxp.com> wrote:
> > This patch replaces ->mode_fixup() with ->atomic_check() so that
> > a full modeset can be requested from there when crtc_state->active
> > is changed to be true(which implies only connector's DPMS is
> > brought
> > out of "Off" status, though not necessarily). Bridge functions are
> > added or changed to accommodate the ->atomic_check() callback.
> > That
> > full modeset is needed by the up-coming patch which gets MIPI DSI
> > controller and PHY ready in ->mode_set(), because it makes sure
> > ->mode_set() and ->atomic_disable() are called in pairs.
> >
> > Cc: Andrzej Hajda <a.hajda at samsung.com>
> > Cc: Neil Armstrong <narmstrong at baylibre.com>
> > Cc: Robert Foss <robert.foss at linaro.org>
> > Cc: Laurent Pinchart <Laurent.pinchart at ideasonboard.com>
> > Cc: Jonas Karlman <jonas at kwiboo.se>
> > Cc: Jernej Skrabec <jernej.skrabec at siol.net>
> > Cc: David Airlie <airlied at linux.ie>
> > Cc: Daniel Vetter <daniel at ffwll.ch>
> > Cc: Guido Günther <agx at sigxcpu.org>
> > Cc: Robert Chiras <robert.chiras at nxp.com>
> > Cc: NXP Linux Team <linux-imx at nxp.com>
> > Signed-off-by: Liu Ying <victor.liu at nxp.com>
> > ---
> > v2->v3:
> > * Split from the single patch in v2 to clarify changes. (Neil)
> >
> > drivers/gpu/drm/bridge/nwl-dsi.c | 61 ++++++++++++++++++++------
> > ------
> > 1 file changed, 39 insertions(+), 22 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c
> > b/drivers/gpu/drm/bridge/nwl-dsi.c
> > index 66b67402f1acd..c65ca860712d2 100644
> > --- a/drivers/gpu/drm/bridge/nwl-dsi.c
> > +++ b/drivers/gpu/drm/bridge/nwl-dsi.c
> > @@ -21,6 +21,7 @@
> > #include <linux/sys_soc.h>
> > #include <linux/time64.h>
> >
> > +#include <drm/drm_atomic_state_helper.h>
> > #include <drm/drm_bridge.h>
> > #include <drm/drm_mipi_dsi.h>
> > #include <drm/drm_of.h>
> > @@ -742,7 +743,9 @@ static int nwl_dsi_disable(struct nwl_dsi *dsi)
> > return 0;
> > }
> >
> > -static void nwl_dsi_bridge_disable(struct drm_bridge *bridge)
> > +static void
> > +nwl_dsi_bridge_atomic_disable(struct drm_bridge *bridge,
> > + struct drm_bridge_state
> > *old_bridge_state)
> > {
> > struct nwl_dsi *dsi = bridge_to_dsi(bridge);
> > int ret;
> > @@ -803,17 +806,6 @@ static int nwl_dsi_get_dphy_params(struct
> > nwl_dsi *dsi,
> > return 0;
> > }
> >
> > -static bool nwl_dsi_bridge_mode_fixup(struct drm_bridge *bridge,
> > - const struct drm_display_mode
> > *mode,
> > - struct drm_display_mode
> > *adjusted_mode)
> > -{
> > - /* At least LCDIF + NWL needs active high sync */
> > - adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
> > DRM_MODE_FLAG_PVSYNC);
> > - adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC |
> > DRM_MODE_FLAG_NVSYNC);
> > -
> > - return true;
> > -}
> > -
> > static enum drm_mode_status
> > nwl_dsi_bridge_mode_valid(struct drm_bridge *bridge,
> > const struct drm_display_info *info,
> > @@ -831,6 +823,24 @@ nwl_dsi_bridge_mode_valid(struct drm_bridge
> > *bridge,
> > return MODE_OK;
> > }
> >
> > +static int nwl_dsi_bridge_atomic_check(struct drm_bridge *bridge,
> > + struct drm_bridge_state
> > *bridge_state,
> > + struct drm_crtc_state
> > *crtc_state,
> > + struct drm_connector_state
> > *conn_state)
> > +{
> > + struct drm_display_mode *adjusted_mode = &crtc_state-
> > >adjusted_mode;
> > +
> > + /* At least LCDIF + NWL needs active high sync */
> > + adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC |
> > DRM_MODE_FLAG_PVSYNC);
> > + adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC |
> > DRM_MODE_FLAG_NVSYNC);
> > +
> > + /* Do a full modeset if crtc_state->active is changed to be
> > true. */
> > + if (crtc_state->active_changed && crtc_state->active)
> > + crtc_state->mode_changed = true;
> > +
> > + return 0;
> > +}
> > +
> > static void
> > nwl_dsi_bridge_mode_set(struct drm_bridge *bridge,
> > const struct drm_display_mode *mode,
> > @@ -862,7 +872,9 @@ nwl_dsi_bridge_mode_set(struct drm_bridge
> > *bridge,
> > drm_mode_debug_printmodeline(adjusted_mode);
> > }
> >
> > -static void nwl_dsi_bridge_pre_enable(struct drm_bridge *bridge)
> > +static void
> > +nwl_dsi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
> > + struct drm_bridge_state
> > *old_bridge_state)
> > {
> > struct nwl_dsi *dsi = bridge_to_dsi(bridge);
> > int ret;
> > @@ -897,7 +909,9 @@ static void nwl_dsi_bridge_pre_enable(struct
> > drm_bridge *bridge)
> > }
> > }
> >
> > -static void nwl_dsi_bridge_enable(struct drm_bridge *bridge)
> > +static void
> > +nwl_dsi_bridge_atomic_enable(struct drm_bridge *bridge,
> > + struct drm_bridge_state
> > *old_bridge_state)
> > {
> > struct nwl_dsi *dsi = bridge_to_dsi(bridge);
> > int ret;
> > @@ -942,14 +956,17 @@ static void nwl_dsi_bridge_detach(struct
> > drm_bridge *bridge)
> > }
> >
> > static const struct drm_bridge_funcs nwl_dsi_bridge_funcs = {
> > - .pre_enable = nwl_dsi_bridge_pre_enable,
> > - .enable = nwl_dsi_bridge_enable,
> > - .disable = nwl_dsi_bridge_disable,
> > - .mode_fixup = nwl_dsi_bridge_mode_fixup,
> > - .mode_set = nwl_dsi_bridge_mode_set,
> > - .mode_valid = nwl_dsi_bridge_mode_valid,
> > - .attach = nwl_dsi_bridge_attach,
> > - .detach = nwl_dsi_bridge_detach,
> > + .atomic_duplicate_state =
> > drm_atomic_helper_bridge_duplicate_state,
> > + .atomic_destroy_state =
> > drm_atomic_helper_bridge_destroy_state,
> > + .atomic_reset = drm_atomic_helper_bridge_reset,
> > + .atomic_check = nwl_dsi_bridge_atomic_check,
> > + .atomic_pre_enable = nwl_dsi_bridge_atomic_pre_enable,
> > + .atomic_enable = nwl_dsi_bridge_atomic_enable,
> > + .atomic_disable = nwl_dsi_bridge_atomic_disable,
> > + .mode_set = nwl_dsi_bridge_mode_set,
> > + .mode_valid = nwl_dsi_bridge_mode_valid,
> > + .attach = nwl_dsi_bridge_attach,
> > + .detach = nwl_dsi_bridge_detach,
> > };
> >
> > static int nwl_dsi_parse_dt(struct nwl_dsi *dsi)
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