drm/panel: Don't store+check prepared/enabled for simple cases

As talked about in commit d2aacaf07395 ("drm/panel: Check for already
prepared/enabled in drm_panel"), we want to remove needless code from
panel drivers that was storing and double-checking the
prepared/enabled state. Even if someone was relying on the
double-check before, that double-check is now in the core and not
needed in individual drivers.

This pile of panel drivers appears to be simple to handle. Based on
code inspection they seemed to be using the prepared/enabled state
simply for double-checking that nothing else in the kernel called them
inconsistently. Now that the core drm_panel is doing the double
checking (and warning) it should be very clear that these devices
don't need their own double-check.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230804140605.RFC.1.Ia54954fd2f7645c1b86597494902973f57feeb71@changeid

drm/panel-asus-z00t-tm5p5-n35596: Drop custom DSI write macros

There are macros for these already in the <drm/drm_mipi_dsi.h> header, use
that instead and delete the custom DSI write macros defined in the driver.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230107191822.3787147-2-javierm@redhat.com

drm/mipi-dsi: Make remove callback return void

All implementations return 0 and the return value of mipi_dsi_drv_remove()
is ignored anyhow.

So change the prototype of the remove function to return no value. This
way driver authors are not tempted to assume that passing an error to
the upper layer is a good idea. All drivers are adapted accordingly.
There is no intended change of behaviour.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708094922.1408248-4-u.kleine-koenig@pengutronix.de

drm/panel: panel-asus-z00t-tm5p5-n35596: Use backlight helper

backlight_properties.fb_blank is deprecated. The states it represents
are handled by other properties; but instead of accessing those
properties directly, drivers should use the helpers provided by
backlight.h.

Instead of retrieving the backlight brightness in struct
backlight_properties manually, and then checking whether the backlight
should be on at all, use backlight_get_brightness() which does all
this and insulates this from future changes.

Signed-off-by: Stephen Kitt <steve@sk2.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220616172316.1355133-2-steve@sk2.org

drm/dsi: Add _NO_ to MIPI_DSI_* flags disabling features

Many of the DSI flags have names opposite to their actual effects,
e.g. MIPI_DSI_MODE_EOT_PACKET means that EoT packets will actually
be disabled. Fix this by including _NO_ in the flag names, e.g.
MIPI_DSI_MODE_NO_EOT_PACKET.

Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda@samsung.com>
Reviewed-by: Xin Ji <xji@analogixsemi.com> # anx7625.c
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org> # msm/dsi
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210727094435.v3.1.I629b2366a6591410359c7fcf6d385b474b705ca2@changeid

drm/panel: remove return value of function drm_panel_add

The function "int drm_panel_add(struct drm_panel *panel)"
always returns 0, this return value is meaningless.
Also, there is no need to check return value which calls
"drm_panel_add and", error branch code will never run.

Signed-off-by: Bernard Zhao <bernard@vivo.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200801120216.8488-1-bernard@vivo.com

drm: Nuke mode->vrefresh

Get rid of mode->vrefresh and just calculate it on demand. Saves
a bit of space and avoids the cached value getting out of sync
with reality.

Mostly done with cocci, with the following manual fixups:
- Remove the now empty loop in drm_helper_probe_single_connector_modes()
- Fix __MODE() macro in ch7006_mode.c
- Fix DRM_MODE_ARG() macro in drm_modes.h
- Remove leftover comment from samsung_s6d16d0_mode
- Drop the TODO

@@
@@
struct drm_display_mode {
...
- int vrefresh;
...
};

@@
identifier N;
expression E;
@@
struct drm_display_mode N = {
- .vrefresh = E
};

@@
identifier N;
expression E;
@@
struct drm_display_mode N[...] = {
...,
{
- .vrefresh = E
}
,...
};

@@
expression E;
@@
{
DRM_MODE(...),
- .vrefresh = E,
}

@@
identifier M, R;
@@
int drm_mode_vrefresh(const struct drm_display_mode *M)
{
...
- if (M->vrefresh > 0)
- R = M->vrefresh;
- else
if (...) {
...
}
...
}

@@
struct drm_display_mode *p;
expression E;
@@
(
- p->vrefresh = E;
|
- p->vrefresh
+ drm_mode_vrefresh(p)
)

@@
struct drm_display_mode s;
expression E;
@@
(
- s.vrefresh = E;
|
- s.vrefresh
+ drm_mode_vrefresh(&s)
)

@@
expression E;
@@
- drm_mode_vrefresh(E) ? drm_mode_vrefresh(E) : drm_mode_vrefresh(E)
+ drm_mode_vrefresh(E)

@find_substruct@
identifier X;
identifier S;
@@
struct X {
...
struct drm_display_mode S;
...
};

@@
identifier find_substruct.S;
expression E;
identifier I;
@@
{
.S = {
- .vrefresh = E
}
}

@@
identifier find_substruct.S;
identifier find_substruct.X;
expression E;
identifier I;
@@
struct X I[...] = {
...,
.S = {
- .vrefresh = E
}
,...
};

v2: Drop TODO
v3: Rebase
v4: Rebase

Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@siol.net>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Jerry Han <hanxu5@huaqin.corp-partner.google.com>
Cc: Icenowy Zheng <icenowy@aosc.io>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Stefan Mavrodiev <stefan@olimex.com>
Cc: Robert Chiras <robert.chiras@nxp.com>
Cc: "Guido Günther" <agx@sigxcpu.org>
Cc: Purism Kernel Team <kernel@puri.sm>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Vincent Abriou <vincent.abriou@st.com>
Cc: VMware Graphics <linux-graphics-maintainer@vmware.com>
Cc: Thomas Hellstrom <thellstrom@vmware.com>
Cc: linux-amlogic@lists.infradead.org
Cc: nouveau@lists.freedesktop.org
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200428171940.19552-4-ville.syrjala@linux.intel.com

drivers: drm: panel: Add ASUS TM5P5 NT35596 panel driver

This adds support for TMP5P5 NT35596 1080x1920 video
mode panel that can be found on some Asus Zenfone 2
Laser (Z00T) devices.

This panel seems to only be found in this device
and we have no straightforward way of actually
getting the correct model number, as no schematics
are released publicly.

Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
[fixed checkpatch warnings]
Link: https://patchwork.freedesktop.org/patch/msgid/20200506210957.344590-2-konradybcio@gmail.com