From: Laurent Pinchart <laurent.pinchart@ideasonboard.com> To: Doug Anderson <dianders@chromium.org> Cc: dri-devel <dri-devel@lists.freedesktop.org>, linux-renesas-soc@vger.kernel.org, Andrzej Hajda <a.hajda@samsung.com>, Neil Armstrong <narmstrong@baylibre.com>, Jonas Karlman <jonas@kwiboo.se>, Jernej Skrabec <jernej.skrabec@siol.net>, Stephen Boyd <swboyd@chromium.org> Subject: Re: [RFC PATCH 05/11] drm/bridge: ti-sn65dsi86: Wrap panel with panel-bridge Date: Fri, 26 Mar 2021 03:06:51 +0200 [thread overview] Message-ID: <YF0zq3fPbxqx++5Z@pendragon.ideasonboard.com> (raw) In-Reply-To: <CAD=FV=VFwphwow7W_v7XHn+1dQHq0zwT-TyJyp9BaFgcs_t9VQ@mail.gmail.com> Hi Doug, On Wed, Mar 24, 2021 at 03:44:39PM -0700, Doug Anderson wrote: > On Sun, Mar 21, 2021 at 8:02 PM Laurent Pinchart wrote: > > > > To simplify interfacing with the panel, wrap it in a panel-bridge and > > let the DRM bridge helpers handle chaining of operations. > > > > This also prepares for support of DRM_BRIDGE_ATTACH_NO_CONNECTOR, which > > requires all components in the display pipeline to be represented by > > bridges. > > > > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > > --- > > drivers/gpu/drm/bridge/ti-sn65dsi86.c | 30 +++++++++++++++++++-------- > > 1 file changed, 21 insertions(+), 9 deletions(-) > > > > diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c > > index 1d1be791d5ba..c21a7f7d452b 100644 > > --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c > > +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c > > @@ -124,6 +124,7 @@ > > * @edid: Detected EDID of eDP panel. > > * @refclk: Our reference clock. > > * @panel: Our panel. > > + * @next_bridge: The next bridge. > > To make it easier for folks who don't work with DRM all day, could you > somehow clarify which direction "next" is talking about. AKA the next > "outward" (towards the sink) or the next "inward" (toward the source)? Sure, I'll expand the comment. > > * @enable_gpio: The GPIO we toggle to enable the bridge. > > * @supplies: Data for bulk enabling/disabling our regulators. > > * @dp_lanes: Count of dp_lanes we're using. > > @@ -152,6 +153,7 @@ struct ti_sn_bridge { > > struct mipi_dsi_device *dsi; > > struct clk *refclk; > > struct drm_panel *panel; > > + struct drm_bridge *next_bridge; > > There's no reason to store the "panel" pointer anymore, right? It can > just be a local variable in probe? Good point, I'll fix that. > > @@ -850,8 +856,6 @@ static void ti_sn_bridge_pre_enable(struct drm_bridge *bridge) > > */ > > regmap_update_bits(pdata->regmap, SN_HPD_DISABLE_REG, HPD_DISABLE, > > HPD_DISABLE); > > - > > - drm_panel_prepare(pdata->panel); > > Ugh, I guess conflicts with my EDID patch [1] which assumes that this > function will directly turn the panel on. I'll see if I can find some > solution... > > [1] https://lore.kernel.org/r/20210304155144.3.I60a7fb23ce4589006bc95c64ab8d15c74b876e68@changeid/ Would using the drm_bridge_connector help ? It's a helper that creates a connector based on a chain of bridges. It implements the .get_modes() connector operation (see drm_bridge_connector_get_modes()), based on the .get_edid() operation provided by the bridges. As it has a full view of the chain, it could enable bridges prior to reading the EDID, and then power them off, including the panel-bridge. -- Regards, Laurent Pinchart
WARNING: multiple messages have this Message-ID (diff)
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com> To: Doug Anderson <dianders@chromium.org> Cc: Jernej Skrabec <jernej.skrabec@siol.net>, Jonas Karlman <jonas@kwiboo.se>, Neil Armstrong <narmstrong@baylibre.com>, dri-devel <dri-devel@lists.freedesktop.org>, Stephen Boyd <swboyd@chromium.org>, linux-renesas-soc@vger.kernel.org, Andrzej Hajda <a.hajda@samsung.com> Subject: Re: [RFC PATCH 05/11] drm/bridge: ti-sn65dsi86: Wrap panel with panel-bridge Date: Fri, 26 Mar 2021 03:06:51 +0200 [thread overview] Message-ID: <YF0zq3fPbxqx++5Z@pendragon.ideasonboard.com> (raw) In-Reply-To: <CAD=FV=VFwphwow7W_v7XHn+1dQHq0zwT-TyJyp9BaFgcs_t9VQ@mail.gmail.com> Hi Doug, On Wed, Mar 24, 2021 at 03:44:39PM -0700, Doug Anderson wrote: > On Sun, Mar 21, 2021 at 8:02 PM Laurent Pinchart wrote: > > > > To simplify interfacing with the panel, wrap it in a panel-bridge and > > let the DRM bridge helpers handle chaining of operations. > > > > This also prepares for support of DRM_BRIDGE_ATTACH_NO_CONNECTOR, which > > requires all components in the display pipeline to be represented by > > bridges. > > > > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > > --- > > drivers/gpu/drm/bridge/ti-sn65dsi86.c | 30 +++++++++++++++++++-------- > > 1 file changed, 21 insertions(+), 9 deletions(-) > > > > diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c > > index 1d1be791d5ba..c21a7f7d452b 100644 > > --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c > > +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c > > @@ -124,6 +124,7 @@ > > * @edid: Detected EDID of eDP panel. > > * @refclk: Our reference clock. > > * @panel: Our panel. > > + * @next_bridge: The next bridge. > > To make it easier for folks who don't work with DRM all day, could you > somehow clarify which direction "next" is talking about. AKA the next > "outward" (towards the sink) or the next "inward" (toward the source)? Sure, I'll expand the comment. > > * @enable_gpio: The GPIO we toggle to enable the bridge. > > * @supplies: Data for bulk enabling/disabling our regulators. > > * @dp_lanes: Count of dp_lanes we're using. > > @@ -152,6 +153,7 @@ struct ti_sn_bridge { > > struct mipi_dsi_device *dsi; > > struct clk *refclk; > > struct drm_panel *panel; > > + struct drm_bridge *next_bridge; > > There's no reason to store the "panel" pointer anymore, right? It can > just be a local variable in probe? Good point, I'll fix that. > > @@ -850,8 +856,6 @@ static void ti_sn_bridge_pre_enable(struct drm_bridge *bridge) > > */ > > regmap_update_bits(pdata->regmap, SN_HPD_DISABLE_REG, HPD_DISABLE, > > HPD_DISABLE); > > - > > - drm_panel_prepare(pdata->panel); > > Ugh, I guess conflicts with my EDID patch [1] which assumes that this > function will directly turn the panel on. I'll see if I can find some > solution... > > [1] https://lore.kernel.org/r/20210304155144.3.I60a7fb23ce4589006bc95c64ab8d15c74b876e68@changeid/ Would using the drm_bridge_connector help ? It's a helper that creates a connector based on a chain of bridges. It implements the .get_modes() connector operation (see drm_bridge_connector_get_modes()), based on the .get_edid() operation provided by the bridges. As it has a full view of the chain, it could enable bridges prior to reading the EDID, and then power them off, including the panel-bridge. -- Regards, Laurent Pinchart _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2021-03-26 1:08 UTC|newest] Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-22 3:01 [RFC PATCH 00/11] drm/bridge: ti-sn65dsi86: Support DisplayPort mode Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-22 3:01 ` [RFC PATCH 01/11] dt-bindings: drm/bridge: ti-sn65dsi8: Make enable GPIO optional Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-22 10:29 ` Jagan Teki 2021-03-22 10:29 ` Jagan Teki 2021-03-23 7:10 ` Stephen Boyd 2021-03-23 7:10 ` Stephen Boyd 2021-03-23 21:08 ` Doug Anderson 2021-03-23 21:08 ` Doug Anderson 2021-03-27 16:42 ` Rob Herring 2021-03-27 16:42 ` Rob Herring 2021-03-22 3:01 ` [RFC PATCH 02/11] drm/bridge: ti-sn65dsi86: " Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-22 10:29 ` Jagan Teki 2021-03-22 10:29 ` Jagan Teki 2021-03-23 7:10 ` Stephen Boyd 2021-03-23 7:10 ` Stephen Boyd 2021-03-23 21:08 ` Doug Anderson 2021-03-23 21:08 ` Doug Anderson 2021-03-22 3:01 ` [RFC PATCH 03/11] drm/bridge: ti-sn65dsi86: Unregister AUX adapter in remove() Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-23 7:10 ` Stephen Boyd 2021-03-23 7:10 ` Stephen Boyd 2021-03-23 21:08 ` Doug Anderson 2021-03-23 21:08 ` Doug Anderson 2021-03-23 21:41 ` Laurent Pinchart 2021-03-23 21:41 ` Laurent Pinchart 2021-03-23 22:55 ` Doug Anderson 2021-03-23 22:55 ` Doug Anderson 2021-03-23 23:02 ` Laurent Pinchart 2021-03-23 23:02 ` Laurent Pinchart 2021-03-26 0:43 ` Doug Anderson 2021-03-26 0:43 ` Doug Anderson 2021-03-26 1:01 ` Laurent Pinchart 2021-03-26 1:01 ` Laurent Pinchart 2021-03-22 3:01 ` [RFC PATCH 04/11] drm/bridge: ti-sn65dsi86: Use bitmask to store valid rates Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-23 7:11 ` Stephen Boyd 2021-03-23 7:11 ` Stephen Boyd 2021-03-23 21:08 ` Doug Anderson 2021-03-23 21:08 ` Doug Anderson 2021-03-23 21:45 ` Laurent Pinchart 2021-03-23 21:45 ` Laurent Pinchart 2021-03-23 22:45 ` Doug Anderson 2021-03-23 22:45 ` Doug Anderson 2021-03-24 8:47 ` Geert Uytterhoeven 2021-03-24 8:47 ` Geert Uytterhoeven 2021-03-22 3:01 ` [RFC PATCH 05/11] drm/bridge: ti-sn65dsi86: Wrap panel with panel-bridge Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-22 10:19 ` Jagan Teki 2021-03-22 10:19 ` Jagan Teki 2021-03-23 7:14 ` Stephen Boyd 2021-03-23 7:14 ` Stephen Boyd 2021-03-23 21:50 ` Laurent Pinchart 2021-03-23 21:50 ` Laurent Pinchart 2021-03-24 22:44 ` Doug Anderson 2021-03-24 22:44 ` Doug Anderson 2021-03-26 1:06 ` Laurent Pinchart [this message] 2021-03-26 1:06 ` Laurent Pinchart 2021-03-22 3:01 ` [RFC PATCH 06/11] drm/bridge: ti-sn65dsi86: Group code in sections Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-23 7:14 ` Stephen Boyd 2021-03-23 7:14 ` Stephen Boyd 2021-03-24 22:44 ` Doug Anderson 2021-03-24 22:44 ` Doug Anderson 2021-03-22 3:01 ` [RFC PATCH 07/11] drm/bridge: ti-sn65dsi86: Split connector creation to a function Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-23 7:15 ` Stephen Boyd 2021-03-23 7:15 ` Stephen Boyd 2021-03-24 22:44 ` Doug Anderson 2021-03-24 22:44 ` Doug Anderson 2021-03-22 3:01 ` [RFC PATCH 08/11] drm/bridge: ti-sn65dsi86: Implement bridge connector operations Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-23 7:15 ` Stephen Boyd 2021-03-23 7:15 ` Stephen Boyd 2021-03-24 22:46 ` Doug Anderson 2021-03-24 22:46 ` Doug Anderson 2021-03-26 1:40 ` Laurent Pinchart 2021-03-26 1:40 ` Laurent Pinchart 2021-03-22 3:01 ` [RFC PATCH 09/11] drm/bridge: ti-sn65dsi86: Make connector creation optional Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-22 3:01 ` [RFC PATCH 10/11] drm/bridge: ti-sn65dsi86: Support DisplayPort (non-eDP) mode Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-24 22:47 ` Doug Anderson 2021-03-24 22:47 ` Doug Anderson 2021-06-23 13:59 ` Laurent Pinchart 2021-06-23 13:59 ` Laurent Pinchart 2022-02-23 18:04 ` Kieran Bingham 2022-02-23 18:04 ` Kieran Bingham 2022-02-23 18:20 ` Doug Anderson 2022-02-23 18:20 ` Doug Anderson 2022-03-04 15:49 ` Laurent Pinchart 2022-03-04 15:49 ` Laurent Pinchart 2021-03-22 3:01 ` [RFC PATCH 11/11] drm/bridge: ti-sn65dsi86: Support hotplug detection Laurent Pinchart 2021-03-22 3:01 ` Laurent Pinchart 2021-03-23 7:21 ` Stephen Boyd 2021-03-23 7:21 ` Stephen Boyd 2021-03-24 22:47 ` Doug Anderson 2021-03-24 22:47 ` Doug Anderson 2021-06-23 23:25 ` Laurent Pinchart 2021-06-23 23:25 ` Laurent Pinchart 2021-06-23 23:51 ` Doug Anderson 2021-06-23 23:51 ` Doug Anderson 2022-02-23 17:43 ` Kieran Bingham 2022-02-23 17:43 ` Kieran Bingham 2022-02-23 18:25 ` Doug Anderson 2022-02-23 18:25 ` Doug Anderson 2022-03-04 15:45 ` Kieran Bingham 2022-03-04 15:45 ` Kieran Bingham 2022-03-04 16:30 ` Doug Anderson 2022-03-04 16:30 ` Doug Anderson
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=YF0zq3fPbxqx++5Z@pendragon.ideasonboard.com \ --to=laurent.pinchart@ideasonboard.com \ --cc=a.hajda@samsung.com \ --cc=dianders@chromium.org \ --cc=dri-devel@lists.freedesktop.org \ --cc=jernej.skrabec@siol.net \ --cc=jonas@kwiboo.se \ --cc=linux-renesas-soc@vger.kernel.org \ --cc=narmstrong@baylibre.com \ --cc=swboyd@chromium.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.