Re: [PATCH 00/22] drm: Convert drivers to drm_simple_encoder_init()

[Thomas Zimmermann <tzimmermann@suse.de>]

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Hi

Am 06.03.20 um 11:56 schrieb Daniel Vetter:
> On Thu, Mar 05, 2020 at 04:59:28PM +0100, Thomas Zimmermann wrote:
>> A call to drm_simple_encoder_init() initializes an encoder without
>> further functionality. It only provides the destroy callback to
>> cleanup the encoder's state. Only few drivers implement more
>> sophisticated encoders than that. Most drivers implement such a
>> simple encoder and can use drm_simple_encoder_init() instead.
>>
>> The patchset converts drivers where the encoder's instance is
>> embedded in a larger data structure. The driver releases the
>> memory during cleanup. Each patch replaces drm_encoder_init() with
>> drm_simple_encoder_init() and removes the (now unused) driver's
>> encoder functions.
>>
>> While the patchset is fairly large, the indiviual patches are self-
>> contained and can be merged independently from each other. The
>> simple-encoder functionality is currently in drm-misc-next, where
>> these patches could go as well.
>>
>> Future directions: There's another common case where the driver
>> calls kzalloc() plus drm_encoder_init(). Such drivers are not
>> handled by this patchset. The plan here is to use a simple encoder
>> with either managed memory allocation (once it's merged), or embed
>> the encoder in a larger data structure and drop kzalloc() entirely.
>>
>> The patchset has been compile-tested on x86-64, aarch64 and arm.
> 
> So from a cursory look all these drivers get it wrong and devm_kzalloc
> their encoders. But I guess simplifying stuff like you do here will at
> least give us a nice list of things to look at once we get to the
> drmm_simple_encoder_init version of all this. On the series:
> 
> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Thanks!

> 
>>
>> Thomas Zimmermann (22):
>>   drm/arc: Use simple encoder
>>   drm/atmel-hlcdc: Use simple encoder
>>   drm/exynos: Use simple encoder
>>   drm/fsl-dcu: Use simple encoder
>>   drm/gma500: Use simple encoder
>>   drm/hisilicon/kirin: Use simple encoder
>>   drm/i2c/tda998x: Use simple encoder
>>   drm/imx: Use simple encoder
>>   drm/ingenic: Use simple encoder
>>   drm/mediatek: Use simple encoder
>>   drm/rcar-du: Use simple encoder
>>   drm/rockchip: Use simple encoder
>>   drm/shmobile: Use simple encoder
>>   drm/sun4i: Use simple encoder
>>   drm/tegra: Use simple encoder
>>   drm/tidss: Use simple encoder
>>   drm/tilcdc: Use simple encoder
>>   drm/vc4: Use simple encoder
>>   drm/virtgpu: Use simple encoder
>>   drm/vkms: Use simple encoder
>>   drm/writeback: Use simple encoder
>>   drm/zte: Use simple encoder
>>
>>  drivers/gpu/drm/arc/arcpgu_hdmi.c              | 10 +++-------
>>  drivers/gpu/drm/arc/arcpgu_sim.c               |  8 ++------
>>  .../gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c   | 12 ++++--------
>>  drivers/gpu/drm/drm_writeback.c                | 10 +++-------
>>  drivers/gpu/drm/exynos/exynos_dp.c             |  8 ++------
>>  drivers/gpu/drm/exynos/exynos_drm_dpi.c        |  8 ++------
>>  drivers/gpu/drm/exynos/exynos_drm_dsi.c        |  8 ++------
>>  drivers/gpu/drm/exynos/exynos_drm_vidi.c       |  8 ++------
>>  drivers/gpu/drm/exynos/exynos_hdmi.c           |  8 ++------
>>  drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c      | 14 +++-----------
>>  drivers/gpu/drm/gma500/cdv_intel_crt.c         | 14 +++-----------
>>  drivers/gpu/drm/gma500/cdv_intel_dp.c          | 16 +++-------------
>>  drivers/gpu/drm/gma500/cdv_intel_hdmi.c        |  4 ++--
>>  drivers/gpu/drm/gma500/cdv_intel_lvds.c        | 17 +++--------------
>>  drivers/gpu/drm/gma500/mdfld_dsi_dpi.c         |  7 +++----
>>  drivers/gpu/drm/gma500/mdfld_output.h          |  1 -
>>  drivers/gpu/drm/gma500/mdfld_tmd_vid.c         |  6 ------
>>  drivers/gpu/drm/gma500/mdfld_tpo_vid.c         |  6 ------
>>  drivers/gpu/drm/gma500/oaktrail_hdmi.c         | 14 ++------------
>>  drivers/gpu/drm/gma500/oaktrail_lvds.c         |  5 +++--
>>  drivers/gpu/drm/gma500/psb_intel_drv.h         |  1 -
>>  drivers/gpu/drm/gma500/psb_intel_lvds.c        | 18 +++---------------
>>  drivers/gpu/drm/gma500/tc35876x-dsi-lvds.c     |  5 -----
>>  drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c   |  8 ++------
>>  drivers/gpu/drm/i2c/tda998x_drv.c              | 14 +++-----------
>>  drivers/gpu/drm/imx/dw_hdmi-imx.c              |  8 ++------
>>  drivers/gpu/drm/imx/imx-drm-core.c             |  6 ------
>>  drivers/gpu/drm/imx/imx-drm.h                  |  1 -
>>  drivers/gpu/drm/imx/imx-ldb.c                  |  8 ++------
>>  drivers/gpu/drm/imx/imx-tve.c                  |  8 ++------
>>  drivers/gpu/drm/imx/parallel-display.c         |  8 ++------
>>  drivers/gpu/drm/ingenic/ingenic-drm.c          |  9 +++------
>>  drivers/gpu/drm/mediatek/mtk_dpi.c             | 14 +++-----------
>>  drivers/gpu/drm/mediatek/mtk_dsi.c             | 14 +++-----------
>>  drivers/gpu/drm/rcar-du/rcar_du_encoder.c      | 14 +++-----------
>>  .../gpu/drm/rockchip/analogix_dp-rockchip.c    |  9 +++------
>>  drivers/gpu/drm/rockchip/cdn-dp-core.c         |  9 +++------
>>  .../gpu/drm/rockchip/dw-mipi-dsi-rockchip.c    |  8 ++------
>>  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c    |  8 ++------
>>  drivers/gpu/drm/rockchip/inno_hdmi.c           |  8 ++------
>>  drivers/gpu/drm/rockchip/rk3066_hdmi.c         |  8 ++------
>>  drivers/gpu/drm/rockchip/rockchip_lvds.c       | 10 +++-------
>>  drivers/gpu/drm/rockchip/rockchip_rgb.c        |  8 ++------
>>  drivers/gpu/drm/shmobile/shmob_drm_crtc.c      | 14 +++-----------
>>  drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c         | 12 +++---------
>>  drivers/gpu/drm/sun4i/sun4i_lvds.c             | 12 +++---------
>>  drivers/gpu/drm/sun4i/sun4i_rgb.c              | 17 +++--------------
>>  drivers/gpu/drm/sun4i/sun4i_tv.c               | 17 +++--------------
>>  drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c         | 12 +++---------
>>  drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c          |  8 ++------
>>  drivers/gpu/drm/tegra/drm.h                    |  2 --
>>  drivers/gpu/drm/tegra/dsi.c                    | 10 +++-------
>>  drivers/gpu/drm/tegra/hdmi.c                   |  9 +++------
>>  drivers/gpu/drm/tegra/output.c                 |  6 +-----
>>  drivers/gpu/drm/tegra/rgb.c                    |  8 ++------
>>  drivers/gpu/drm/tegra/sor.c                    |  8 ++------
>>  drivers/gpu/drm/tidss/tidss_encoder.c          | 10 +++-------
>>  drivers/gpu/drm/tilcdc/tilcdc_external.c       | 10 +++-------
>>  drivers/gpu/drm/tilcdc/tilcdc_panel.c          |  8 ++------
>>  drivers/gpu/drm/vc4/vc4_dpi.c                  |  8 ++------
>>  drivers/gpu/drm/vc4/vc4_dsi.c                  | 15 +++------------
>>  drivers/gpu/drm/vc4/vc4_hdmi.c                 | 17 ++++-------------
>>  drivers/gpu/drm/vc4/vc4_vec.c                  |  8 ++------
>>  drivers/gpu/drm/virtio/virtgpu_display.c       |  8 ++------
>>  drivers/gpu/drm/vkms/vkms_output.c             |  8 ++------
>>  drivers/gpu/drm/zte/zx_hdmi.c                  |  8 ++------
>>  drivers/gpu/drm/zte/zx_tvenc.c                 |  8 ++------
>>  drivers/gpu/drm/zte/zx_vga.c                   |  8 ++------
>>  68 files changed, 151 insertions(+), 488 deletions(-)
>>
>> --
>> 2.25.1
>>
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


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