From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Pinchart Subject: Re: [PATCH 00/22] drm: Convert drivers to drm_simple_encoder_init() Date: Fri, 6 Mar 2020 16:22:12 +0200 Message-ID: <20200306142212.GF4878@pendragon.ideasonboard.com> References: <20200305155950.2705-1-tzimmermann@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Content-Disposition: inline In-Reply-To: <20200305155950.2705-1-tzimmermann-l3A5Bk7waGM@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Thomas Zimmermann Cc: airlied-cv59FeDIM0c@public.gmane.org, daniel-/w4YWyX8dFk@public.gmane.org, sam-uyr5N9Q2VtJg9hUCZPvPmw@public.gmane.org, abrodkin-HKixBCOQz3hWk0Htik3J/w@public.gmane.org, bbrezillon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, nicolas.ferre-UWL1GkI3JZL3oGB3hsPCZA@public.gmane.org, alexandre.belloni-LDxbnhwyfcJBDgjK7y7TUQ@public.gmane.org, ludovic.desroches-UWL1GkI3JZL3oGB3hsPCZA@public.gmane.org, maarten.lankhorst-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, mripard-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, jingoohan1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, inki.dae-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org, jy0922.shim-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org, sw0312.kim-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org, kyungmin.park-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org, kgene-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, krzk-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, stefan-XLVq0VzYD2Y@public.gmane.org, alison.wang-3arQi8VN3Tc@public.gmane.org, patrik.r.jakobsson-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, xinliang.liu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, zourongrong-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, john.stultz-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, kong.kongxinwei-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org, puck.chen-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org, linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org, p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, shawnguo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, festevam-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-imx-3arQi8VN3Tc@public.gmane.org, paul-icTtO2rgO2OTuSrc4Mpeew@public.gmane.org, ck.hu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org List-Id: linux-tegra@vger.kernel.org Hi Thomas, Thank you for the patch. 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. I've reviewed the whole series, including verifying that the few instances of struct drm_encoder_funcs that were not declared const were not modified somewhere to add more function pointers. Reviewed-by: Laurent Pinchart for all the patches. However, I'd like to note that drm_simple_encoder_init() is a bit of a misnommer here. Several of the encoders in those drivers to implement additional functionality. They just expose them through drm_encoder_helper_funcs, not drm_encoder_funcs. > 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. I think an even more interesting future enhancement would be to add encoder support to the newly added drm_bridge_connector_init(), for drivers that are fully based on bridges and don't implement any encoder operation, neither through drm_encoder_funcs nor through drm_encoder_helper_funcs. > The patchset has been compile-tested on x86-64, aarch64 and arm. > > 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(-) -- Regards, Laurent Pinchart