From: "dbasehore ." <dbasehore@chromium.org>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Sam Ravnborg <sam@ravnborg.org>,
Intel Graphics <intel-gfx@lists.freedesktop.org>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Jani Nikula <jani.nikula@linux.intel.com>,
David Airlie <airlied@linux.ie>,
Thierry Reding <thierry.reding@gmail.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
dri-devel <dri-devel@lists.freedesktop.org>,
Daniel Vetter <daniel@ffwll.ch>,
Rodrigo Vivi <rodrigo.vivi@intel.com>, CK Hu <ck.hu@mediatek.com>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>, Sean Paul <sean@poorly.run>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v3 2/4] drm/panel: set display info in panel attach
Date: Mon, 24 Jun 2019 16:04:54 -0700 [thread overview]
Message-ID: <CAGAzgsrhS_nsXqf83ivZS5qcfT+Ss0=pzshH_i2+-Hd1iVNgNA@mail.gmail.com> (raw)
In-Reply-To: <20190622034105.188454-3-dbasehore@chromium.org>
On Fri, Jun 21, 2019 at 8:41 PM Derek Basehore <dbasehore@chromium.org> wrote:
>
> Devicetree systems can set panel orientation via a panel binding, but
> there's no way, as is, to propagate this setting to the connector,
> where the property need to be added.
> To address this, this patch sets orientation, as well as other fixed
> values for the panel, in the drm_panel_attach function. These values
> are stored from probe in the drm_panel struct.
>
> Signed-off-by: Derek Basehore <dbasehore@chromium.org>
> ---
> drivers/gpu/drm/drm_panel.c | 28 ++++++++++++++++++++++++++++
> include/drm/drm_panel.h | 14 ++++++++++++++
> 2 files changed, 42 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c
> index 507099af4b57..5690fca30236 100644
> --- a/drivers/gpu/drm/drm_panel.c
> +++ b/drivers/gpu/drm/drm_panel.c
> @@ -104,11 +104,23 @@ EXPORT_SYMBOL(drm_panel_remove);
> */
> int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector)
> {
> + struct drm_display_info *info;
> +
> if (panel->connector)
> return -EBUSY;
>
> panel->connector = connector;
> panel->drm = connector->dev;
> + info = &connector->display_info;
> + info->width_mm = panel->width_mm;
> + info->height_mm = panel->height_mm;
> + info->bpc = panel->bpc;
> + info->panel_orientation = panel->orientation;
> + info->bus_flags = panel->bus_flags;
> + if (panel->bus_formats)
> + drm_display_info_set_bus_formats(&connector->display_info,
> + panel->bus_formats,
> + panel->num_bus_formats);
>
> return 0;
> }
> @@ -128,6 +140,22 @@ EXPORT_SYMBOL(drm_panel_attach);
> */
> int drm_panel_detach(struct drm_panel *panel)
> {
> + struct drm_display_info *info;
> +
> + if (!panel->connector)
> + goto out;
> +
> + info = &panel->connector->display_info;
> + info->width_mm = 0;
> + info->height_mm = 0;
> + info->bpc = 0;
> + info->panel_orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
> + info->bus_flags = 0;
> + kfree(info->bus_formats);
> + info->bus_formats = NULL;
> + info->num_bus_formats = 0;
> +
> +out:
> panel->connector = NULL;
> panel->drm = NULL;
>
> diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
> index 3564952f1a4f..760ca5865962 100644
> --- a/include/drm/drm_panel.h
> +++ b/include/drm/drm_panel.h
> @@ -37,6 +37,8 @@ struct display_timing;
> * struct drm_panel_funcs - perform operations on a given panel
> * @disable: disable panel (turn off back light, etc.)
> * @unprepare: turn off panel
> + * @detach: detach panel->connector (clear internal state, etc.)
> + * @attach: attach panel->connector (update internal state, etc.)
> * @prepare: turn on panel and perform set up
> * @enable: enable panel (turn on back light, etc.)
> * @get_modes: add modes to the connector that the panel is attached to and
> @@ -93,6 +95,18 @@ struct drm_panel {
>
> const struct drm_panel_funcs *funcs;
>
> + /*
> + * panel information to be set in the connector when the panel is
> + * attached.
> + */
> + unsigned int width_mm;
> + unsigned int height_mm;
> + unsigned int bpc;
> + int orientation;
> + const u32 *bus_formats;
> + unsigned int num_bus_formats;
> + u32 bus_flags;
Should probably put these in a struct to ensure the connector and
panel have the same data types. Will do in a following patch if we
stay with this.
> +
> struct list_head list;
> };
>
> --
> 2.22.0.410.gd8fdbe21b5-goog
>
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next prev parent reply other threads:[~2019-06-24 23:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-22 3:41 [PATCH v3 0/4] Panel rotation patches Derek Basehore
2019-06-22 3:41 ` [PATCH v3 1/4] drm/panel: Add helper for reading DT rotation Derek Basehore
2019-06-24 20:36 ` Sam Ravnborg
2019-06-25 22:12 ` dbasehore .
2019-06-22 3:41 ` [PATCH v3 2/4] drm/panel: set display info in panel attach Derek Basehore
2019-06-24 23:04 ` dbasehore . [this message]
2019-06-22 3:41 ` [PATCH v3 3/4] drm/connector: Split out orientation quirk detection Derek Basehore
2019-06-23 12:11 ` [Intel-gfx] " Hans de Goede
2019-06-24 13:24 ` Ville Syrjälä
2019-07-02 3:24 ` dbasehore .
2019-06-22 3:41 ` [PATCH v4 4/4] drm/mtk: add panel orientation property Derek Basehore
2019-07-01 1:59 ` CK Hu
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