linux/drivers/gpu/drm/sun4i
Giulio Benetti 1169602150 drm/sun4i: tcon: fix inverted DCLK polarity
[ Upstream commit 67f4aeb2b41a0629abde3794d463547f60b0cbdd ]

During commit 88bc417856 ("drm: Use new
DRM_BUS_FLAG_*_(DRIVE|SAMPLE)_(POS|NEG)EDGE flags") DRM_BUS_FLAG_*
macros have been changed to avoid ambiguity but just because of this
ambiguity previous DRM_BUS_FLAG_PIXDATA_(POS/NEG)EDGE were used meaning
_SAMPLE_ not _DRIVE_. This leads to DLCK inversion and need to fix but
instead of swapping phase values, let's adopt an easier approach Maxime
suggested:
It turned out that bit 26 of SUN4I_TCON0_IO_POL_REG is dedicated to
invert DCLK polarity and this makes things really easier than before. So
let's handle DCLK polarity by adding SUN4I_TCON0_IO_POL_DCLK_DRIVE_NEGEDGE
as bit 26 and activating according to bus_flags the same way it is done
for all the other signals polarity.

Fixes: 88bc417856 ("drm: Use new DRM_BUS_FLAG_*_(DRIVE|SAMPLE)_(POS|NEG)EDGE flags")
Suggested-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210114081732.9386-1-giulio.benetti@benettiengineering.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-03-04 10:26:21 +01:00
..
Kconfig
Makefile
sun4i_backend.c drm/sun4i: backend: Disable alpha on the lowest plane on the A20 2020-09-17 13:47:43 +02:00
sun4i_backend.h
sun4i_crtc.c
sun4i_crtc.h
sun4i_dotclock.c
sun4i_dotclock.h
sun4i_drv.c
sun4i_drv.h
sun4i_framebuffer.c
sun4i_framebuffer.h
sun4i_frontend.c drm/sun4i: frontend: Fix the scaler phase on A33 2020-11-10 12:37:29 +01:00
sun4i_frontend.h drm/sun4i: frontend: Rework a bit the phase data 2020-11-10 12:37:29 +01:00
sun4i_hdmi.h
sun4i_hdmi_ddc_clk.c
sun4i_hdmi_enc.c
sun4i_hdmi_i2c.c
sun4i_hdmi_tmds_clk.c
sun4i_layer.c
sun4i_layer.h
sun4i_lvds.c
sun4i_lvds.h
sun4i_rgb.c
sun4i_rgb.h
sun4i_tcon.c drm/sun4i: tcon: fix inverted DCLK polarity 2021-03-04 10:26:21 +01:00
sun4i_tcon.h drm/sun4i: tcon: fix inverted DCLK polarity 2021-03-04 10:26:21 +01:00
sun4i_tv.c
sun6i_drc.c
sun6i_mipi_dsi.c
sun6i_mipi_dsi.h
sun8i_csc.c
sun8i_csc.h drm/sun4i: sun8i-csc: Secondary CSC register correction 2020-10-01 13:18:18 +02:00
sun8i_dw_hdmi.c drm/sun4i: dw-hdmi: Fix max. frequency for H6 2021-02-17 10:35:18 +01:00
sun8i_dw_hdmi.h
sun8i_hdmi_phy.c drm/sun4i: Fix H6 HDMI PHY configuration 2021-02-17 10:35:18 +01:00
sun8i_hdmi_phy_clk.c
sun8i_mixer.c drm/sun4i: mixer: Extend regmap max_register 2020-10-07 08:01:26 +02:00
sun8i_mixer.h
sun8i_tcon_top.c
sun8i_tcon_top.h
sun8i_ui_layer.c
sun8i_ui_layer.h
sun8i_ui_scaler.c
sun8i_ui_scaler.h
sun8i_vi_layer.c
sun8i_vi_layer.h
sun8i_vi_scaler.c
sun8i_vi_scaler.h
sunxi_engine.h