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
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