On Thu, May 03, 2018 at 01:53:55PM +0530, Satendra Singh Thakur wrote: > 1.There is a function in drm-core to calculate display timing parameters: > horizontal front porch, back porch, sync length, > vertical front porch, back porch, sync length and > clock in Hz. > However, some drivers are still calculating these parameters themselves. > Therefore, there is a duplication of the code. > This patch series replaces this redundant code with the function > drm_display_mode_to_videomode. > This removes nearly 100 redundant lines from the related drivers. > 2.For some drivers (sun4i) the reverse helper > drm_display_mode_from_videomode is used. > 3.For some drivers it replaces arithmatic operators (*, /) with shifting > operators (>>, <<). > 4.For some drivers DRM_MODE_FLAG_* are replaced with DISPLAY_FLAGS_* flags. > 5.These changes apply to following crtc and encoder drivers: > atmel-hlcdc > bridge-tc358767 > exynos-dsi > fsl-dcu > gma500-mdfld_dsi_dpi > hisilicon-kirin_dsi, ade > meson-encoder > pl111-display > sun4i-tv > ti lcdc > tegra dc > mediatek dpi dsi > bridge-adv7533 The drm_mode_to_videomode helper is meant for interop between drm and v4l, which have different internal structures to represent modes. For drivers that only use drm I think the better option would be to add these fields to struct drm_display_mode as another set of crtc_* values (the computed values are stored in crtc_ prefixed members). And compute front/back porch in drm_mode_set_crtcinfo. Then we can use these new drm_display_mode->crtc_h|vfront|back_porch fields in all the drivers you're changing. This way you avoid having to change all the drm drivers to use v4l #defines. Thanks, Daniel > > Satendra Singh Thakur (13): > drm/kms/mode/atmel-hlcdc: using helper func > drm_display_mode_to_videomode for calculating timing parameters > drm/kms/mode/bridge-tc358767: using helper func > drm_display_mode_to_videomode for calculating timing parameters > drm/kms/mode/exynos-dsi: using helper func > drm_display_mode_to_videomode for calculating timing parameters > drm/kms/mode/fsl-dcu: using helper func drm_display_mode_to_videomode > for calculating timing parameters > drm/kms/mode/gma500-mdfld_dsi_dpi: using helper function > drm_display_mode_to_videomode for calculating timing parameters > drm/kms/mode/hisilicon-kirin-dsi-ade: using helper function > drm_display_mode_to_videomode for calculating timing parameters > drm/kms/mode/meson-encoder: using helper function > drm_display_mode_to_videomode for calculating timing parameters > drm/kms/mode/pl111-display: using helper function > drm_display_mode_to_videomode for calculating timing parameters > drm/kms/mode/sun4i-tv: using helper func > drm_display_mode_from_videomode for calculating timing > parameters > drm/kms/mode/ti-lcdc: using helper func drm_display_mode_to_videomode > for calculating timing parameters > drm/kms/mode/tegra: using helper func drm_display_mode_to_videomode > for calculating timing parameters > drm/kms/mode/mtk_dpi_dsi: using helper func > drm_display_mode_to_videomode for calculating timing parameters > drm/kms/mode/bridge-adv7533: using helper func > drm_display_mode_to_videomode for calculating timing parameters > > drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 28 +++-- > drivers/gpu/drm/bridge/adv7511/adv7533.c | 35 +++--- > drivers/gpu/drm/bridge/tc358767.c | 42 +++---- > drivers/gpu/drm/exynos/exynos_drm_dsi.c | 9 +- > drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c | 29 ++--- > drivers/gpu/drm/gma500/mdfld_dsi_dpi.c | 28 ++--- > drivers/gpu/drm/hisilicon/kirin/dw_drm_dsi.c | 42 ++++--- > drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c | 52 +++------ > drivers/gpu/drm/mediatek/mtk_dpi.c | 60 +++++----- > drivers/gpu/drm/mediatek/mtk_dsi.c | 14 +-- > drivers/gpu/drm/meson/meson_venc.c | 149 +++++++++++------------- > drivers/gpu/drm/pl111/pl111_display.c | 40 +++---- > drivers/gpu/drm/sun4i/sun4i_tv.c | 67 ++++------- > drivers/gpu/drm/tegra/dc.c | 15 ++- > drivers/gpu/drm/tilcdc/tilcdc_crtc.c | 60 +++++----- > 15 files changed, 280 insertions(+), 390 deletions(-) > > -- > 2.7.4 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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