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Message-ID: <20230623153613.GR2112@pendragon.ideasonboard.com>
Date: Fri, 23 Jun 2023 18:36:13 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Thomas Zimmermann <tzimmermann@...e.de>,
Magnus Damm <magnus.damm@...il.com>,
dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/39] drm: renesas: shmobile: Remove backlight support
Hi Geert,
Thank you for the patch.
On Thu, Jun 22, 2023 at 11:21:23AM +0200, Geert Uytterhoeven wrote:
> From: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
>
> Backlight support should be implemented by panels, not by the LCDC
> driver. As the feature is currently unused anyway, remove it.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
> [geert: Cleanups]
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
> ---
> Changes compared to Laurent's original:
> - Rebase,
> - Remove unused variable ‘scon’,
> - Remove now unused to_shmob_encoder() macro,
> - Remove now empty shmob_drm_encoder wrapper.
> ---
> drivers/gpu/drm/renesas/shmobile/Makefile | 3 +-
> .../renesas/shmobile/shmob_drm_backlight.c | 82 -------------------
> .../renesas/shmobile/shmob_drm_backlight.h | 19 -----
> .../gpu/drm/renesas/shmobile/shmob_drm_crtc.c | 33 +-------
> .../gpu/drm/renesas/shmobile/shmob_drm_crtc.h | 8 --
> .../gpu/drm/renesas/shmobile/shmob_drm_drv.h | 2 +-
> .../gpu/drm/renesas/shmobile/shmob_drm_kms.c | 2 +-
> include/linux/platform_data/shmob_drm.h | 8 --
> 8 files changed, 7 insertions(+), 150 deletions(-)
> delete mode 100644 drivers/gpu/drm/renesas/shmobile/shmob_drm_backlight.c
> delete mode 100644 drivers/gpu/drm/renesas/shmobile/shmob_drm_backlight.h
>
> diff --git a/drivers/gpu/drm/renesas/shmobile/Makefile b/drivers/gpu/drm/renesas/shmobile/Makefile
> index 861edafed8562c87..2679555d61a70207 100644
> --- a/drivers/gpu/drm/renesas/shmobile/Makefile
> +++ b/drivers/gpu/drm/renesas/shmobile/Makefile
> @@ -1,6 +1,5 @@
> # SPDX-License-Identifier: GPL-2.0
> -shmob-drm-y := shmob_drm_backlight.o \
> - shmob_drm_crtc.o \
> +shmob-drm-y := shmob_drm_crtc.o \
> shmob_drm_drv.o \
> shmob_drm_kms.o \
> shmob_drm_plane.o
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_backlight.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_backlight.c
> deleted file mode 100644
> index 794573badfe86076..0000000000000000
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_backlight.c
> +++ /dev/null
> @@ -1,82 +0,0 @@
> -// SPDX-License-Identifier: GPL-2.0+
> -/*
> - * shmob_drm_backlight.c -- SH Mobile DRM Backlight
> - *
> - * Copyright (C) 2012 Renesas Electronics Corporation
> - *
> - * Laurent Pinchart (laurent.pinchart@...asonboard.com)
> - */
> -
> -#include <linux/backlight.h>
> -
> -#include "shmob_drm_backlight.h"
> -#include "shmob_drm_crtc.h"
> -#include "shmob_drm_drv.h"
> -
> -static int shmob_drm_backlight_update(struct backlight_device *bdev)
> -{
> - struct shmob_drm_connector *scon = bl_get_data(bdev);
> - struct shmob_drm_device *sdev = scon->connector.dev->dev_private;
> - const struct shmob_drm_backlight_data *bdata = &sdev->pdata->backlight;
> - int brightness = backlight_get_brightness(bdev);
> -
> - return bdata->set_brightness(brightness);
> -}
> -
> -static int shmob_drm_backlight_get_brightness(struct backlight_device *bdev)
> -{
> - struct shmob_drm_connector *scon = bl_get_data(bdev);
> - struct shmob_drm_device *sdev = scon->connector.dev->dev_private;
> - const struct shmob_drm_backlight_data *bdata = &sdev->pdata->backlight;
> -
> - return bdata->get_brightness();
> -}
> -
> -static const struct backlight_ops shmob_drm_backlight_ops = {
> - .options = BL_CORE_SUSPENDRESUME,
> - .update_status = shmob_drm_backlight_update,
> - .get_brightness = shmob_drm_backlight_get_brightness,
> -};
> -
> -void shmob_drm_backlight_dpms(struct shmob_drm_connector *scon, int mode)
> -{
> - if (scon->backlight == NULL)
> - return;
> -
> - scon->backlight->props.power = mode == DRM_MODE_DPMS_ON
> - ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
> - backlight_update_status(scon->backlight);
> -}
> -
> -int shmob_drm_backlight_init(struct shmob_drm_connector *scon)
> -{
> - struct shmob_drm_device *sdev = scon->connector.dev->dev_private;
> - const struct shmob_drm_backlight_data *bdata = &sdev->pdata->backlight;
> - struct drm_connector *connector = &scon->connector;
> - struct drm_device *dev = connector->dev;
> - struct backlight_device *backlight;
> -
> - if (!bdata->max_brightness)
> - return 0;
> -
> - backlight = backlight_device_register(bdata->name, dev->dev, scon,
> - &shmob_drm_backlight_ops, NULL);
> - if (IS_ERR(backlight)) {
> - dev_err(dev->dev, "unable to register backlight device: %ld\n",
> - PTR_ERR(backlight));
> - return PTR_ERR(backlight);
> - }
> -
> - backlight->props.max_brightness = bdata->max_brightness;
> - backlight->props.brightness = bdata->max_brightness;
> - backlight->props.power = FB_BLANK_POWERDOWN;
> - backlight_update_status(backlight);
> -
> - scon->backlight = backlight;
> - return 0;
> -}
> -
> -void shmob_drm_backlight_exit(struct shmob_drm_connector *scon)
> -{
> - backlight_device_unregister(scon->backlight);
> -}
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_backlight.h b/drivers/gpu/drm/renesas/shmobile/shmob_drm_backlight.h
> deleted file mode 100644
> index d9abb7a60be5c414..0000000000000000
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_backlight.h
> +++ /dev/null
> @@ -1,19 +0,0 @@
> -/* SPDX-License-Identifier: GPL-2.0+ */
> -/*
> - * shmob_drm_backlight.h -- SH Mobile DRM Backlight
> - *
> - * Copyright (C) 2012 Renesas Electronics Corporation
> - *
> - * Laurent Pinchart (laurent.pinchart@...asonboard.com)
> - */
> -
> -#ifndef __SHMOB_DRM_BACKLIGHT_H__
> -#define __SHMOB_DRM_BACKLIGHT_H__
> -
> -struct shmob_drm_connector;
> -
> -void shmob_drm_backlight_dpms(struct shmob_drm_connector *scon, int mode);
> -int shmob_drm_backlight_init(struct shmob_drm_connector *scon);
> -void shmob_drm_backlight_exit(struct shmob_drm_connector *scon);
> -
> -#endif /* __SHMOB_DRM_BACKLIGHT_H__ */
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c
> index 9bfdfa7c6e2b1001..c775c1d49f0e1ce9 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c
> @@ -7,7 +7,6 @@
> * Laurent Pinchart (laurent.pinchart@...asonboard.com)
> */
>
> -#include <linux/backlight.h>
> #include <linux/clk.h>
> #include <linux/pm_runtime.h>
>
> @@ -24,7 +23,6 @@
> #include <drm/drm_simple_kms_helper.h>
> #include <drm/drm_vblank.h>
>
> -#include "shmob_drm_backlight.h"
> #include "shmob_drm_crtc.h"
> #include "shmob_drm_drv.h"
> #include "shmob_drm_kms.h"
> @@ -520,21 +518,9 @@ int shmob_drm_crtc_create(struct shmob_drm_device *sdev)
> * Encoder
> */
>
> -#define to_shmob_encoder(e) \
> - container_of(e, struct shmob_drm_encoder, encoder)
> -
> static void shmob_drm_encoder_dpms(struct drm_encoder *encoder, int mode)
> {
> - struct shmob_drm_encoder *senc = to_shmob_encoder(encoder);
> - struct shmob_drm_device *sdev = encoder->dev->dev_private;
> - struct shmob_drm_connector *scon = &sdev->connector;
> -
> - if (senc->dpms == mode)
> - return;
> -
> - shmob_drm_backlight_dpms(scon, mode);
> -
> - senc->dpms = mode;
> + /* No-op, everything is handled in the CRTC code. */
> }
>
> static bool shmob_drm_encoder_mode_fixup(struct drm_encoder *encoder,
> @@ -586,11 +572,9 @@ static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
>
> int shmob_drm_encoder_create(struct shmob_drm_device *sdev)
> {
> - struct drm_encoder *encoder = &sdev->encoder.encoder;
> + struct drm_encoder *encoder = &sdev->encoder;
> int ret;
>
> - sdev->encoder.dpms = DRM_MODE_DPMS_OFF;
> -
> encoder->possible_crtcs = 1;
>
> ret = drm_simple_encoder_init(sdev->ddev, encoder,
> @@ -655,9 +639,6 @@ static const struct drm_connector_helper_funcs connector_helper_funcs = {
>
> static void shmob_drm_connector_destroy(struct drm_connector *connector)
> {
> - struct shmob_drm_connector *scon = to_shmob_connector(connector);
> -
> - shmob_drm_backlight_exit(scon);
> drm_connector_unregister(connector);
> drm_connector_cleanup(connector);
> }
> @@ -686,13 +667,9 @@ int shmob_drm_connector_create(struct shmob_drm_device *sdev,
>
> drm_connector_helper_add(connector, &connector_helper_funcs);
>
> - ret = shmob_drm_backlight_init(&sdev->connector);
> - if (ret < 0)
> - goto err_cleanup;
> -
> ret = drm_connector_attach_encoder(connector, encoder);
> if (ret < 0)
> - goto err_backlight;
> + goto error;
>
> drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
> drm_object_property_set_value(&connector->base,
> @@ -700,9 +677,7 @@ int shmob_drm_connector_create(struct shmob_drm_device *sdev,
>
> return 0;
>
> -err_backlight:
> - shmob_drm_backlight_exit(&sdev->connector);
> -err_cleanup:
> +error:
> drm_connector_cleanup(connector);
> return ret;
> }
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.h b/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.h
> index 21718843f46d3d19..bce6926269453b77 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.h
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.h
> @@ -14,7 +14,6 @@
> #include <drm/drm_connector.h>
> #include <drm/drm_encoder.h>
>
> -struct backlight_device;
> struct drm_pending_vblank_event;
> struct shmob_drm_device;
> struct shmob_drm_format_info;
> @@ -31,16 +30,9 @@ struct shmob_drm_crtc {
> bool started;
> };
>
> -struct shmob_drm_encoder {
> - struct drm_encoder encoder;
> - int dpms;
> -};
> -
> struct shmob_drm_connector {
> struct drm_connector connector;
> struct drm_encoder *encoder;
> -
> - struct backlight_device *backlight;
> };
>
> int shmob_drm_crtc_create(struct shmob_drm_device *sdev);
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.h b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.h
> index 4964ddd5ab7472b0..16d830168b2ada21 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.h
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.h
> @@ -35,7 +35,7 @@ struct shmob_drm_device {
> struct drm_device *ddev;
>
> struct shmob_drm_crtc crtc;
> - struct shmob_drm_encoder encoder;
> + struct drm_encoder encoder;
> struct shmob_drm_connector connector;
> };
>
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c
> index 8fd360149743f8e2..3051318ddc7999bc 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c
> @@ -159,7 +159,7 @@ int shmob_drm_modeset_init(struct shmob_drm_device *sdev)
>
> shmob_drm_crtc_create(sdev);
> shmob_drm_encoder_create(sdev);
> - shmob_drm_connector_create(sdev, &sdev->encoder.encoder);
> + shmob_drm_connector_create(sdev, &sdev->encoder);
>
> drm_kms_helper_poll_init(sdev->ddev);
>
> diff --git a/include/linux/platform_data/shmob_drm.h b/include/linux/platform_data/shmob_drm.h
> index d661399b217dfc4b..b6b5b6607fb5e52c 100644
> --- a/include/linux/platform_data/shmob_drm.h
> +++ b/include/linux/platform_data/shmob_drm.h
> @@ -40,13 +40,6 @@ enum shmob_drm_interface {
> SHMOB_DRM_IFACE_SYS24, /* 24bpp */
> };
>
> -struct shmob_drm_backlight_data {
> - const char *name;
> - int max_brightness;
> - int (*get_brightness)(void);
> - int (*set_brightness)(int brightness);
> -};
> -
> struct shmob_drm_panel_data {
> unsigned int width_mm; /* Panel width in mm */
> unsigned int height_mm; /* Panel height in mm */
> @@ -83,7 +76,6 @@ struct shmob_drm_platform_data {
> enum shmob_drm_clk_source clk_source;
> struct shmob_drm_interface_data iface;
> struct shmob_drm_panel_data panel;
> - struct shmob_drm_backlight_data backlight;
> };
>
> #endif /* __SHMOB_DRM_H__ */
--
Regards,
Laurent Pinchart
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