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linux_dsm_epyc7002/drivers/gpu/drm/sun4i
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Chen-Yu Tsai 4396393fb9
drm/sun4i: tcon: Set RGB DCLK min. divider based on hardware model 
In commit 0b8e7bbde5 ("drm/sun4i: tcon: Set min division of TCON0_DCLK
to 1.") it was assumed that all TCON variants support a minimum divider
of 1 if only DCLK was used.

However, the oldest generation of hardware only supports minimum divider
of 4 if only DCLK is used. If a divider of 1 was used on this old
hardware, some scrolling artifact would appear. A divider of 2 seemed
OK, but a divider of 3 had artifacts as well.

Set the minimum divider when outputing to parallel RGB based on the
hardware model, with a minimum of 4 for the oldest (A10/A10s/A13/A20)
hardware, and a minimum of 1 for the rest. A value is not set for the
TCON variants lacking channel 0.

This fixes the scrolling artifacts seen on my A13 tablet.

Fixes: 0b8e7bbde5 ("drm/sun4i: tcon: Set min division of TCON0_DCLK to 1.")
Cc: <stable@vger.kernel.org> # 5.4.x
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20200107070113.28951-1-wens@kernel.org
2020-01-07 15:56:40 +01:00
..
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile phy: Move Allwinner A31 D-PHY driver to drivers/phy/ 2019-02-07 09:34:49 +01:00
sun4i_backend.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun4i_backend.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_crtc.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun4i_crtc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_dotclock.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_dotclock.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_drv.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun4i_drv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_framebuffer.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun4i_framebuffer.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_frontend.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun4i_frontend.h drm/sun4i: frontend: Move the FIR filter phases to our quirks 2019-01-18 21:12:26 +01:00
sun4i_hdmi_ddc_clk.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_hdmi_enc.c drm/sun4i: hdmi: Remove duplicate cleanup calls 2019-12-18 23:17:32 +01:00
sun4i_hdmi_i2c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_hdmi_tmds_clk.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_hdmi.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_layer.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun4i_layer.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_lvds.c drm: Stop including drm_bridge.h from drm_crtc.h 2019-08-28 22:11:03 +02:00
sun4i_lvds.h
sun4i_rgb.c drm: Stop including drm_bridge.h from drm_crtc.h 2019-08-28 22:11:03 +02:00
sun4i_rgb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun4i_tcon.c drm/sun4i: tcon: Set RGB DCLK min. divider based on hardware model 2020-01-07 15:56:40 +01:00
sun4i_tcon.h drm/sun4i: tcon: Set RGB DCLK min. divider based on hardware model 2020-01-07 15:56:40 +01:00
sun4i_tv.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun6i_drc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun6i_mipi_dsi.c drm/sun4i: dsi: Fix video start delay computation 2019-10-08 07:56:41 +02:00
sun6i_mipi_dsi.h drm/sun4i: sun6i_mipi_dsi: Add VCC-DSI regulator support 2019-10-03 13:48:43 +02:00
sun8i_csc.c drm/sun4i: sun8i-csc: Add support for color encoding and range 2019-07-20 07:38:09 +02:00
sun8i_csc.h drm/sun4i: sun8i-csc: Add support for color encoding and range 2019-07-20 07:38:09 +02:00
sun8i_dw_hdmi.c drm/sun4i: Enable DRM InfoFrame support on H6 2019-10-10 12:50:03 +02:00
sun8i_dw_hdmi.h drm/sun4i: Enable DRM InfoFrame support on H6 2019-10-10 12:50:03 +02:00
sun8i_hdmi_phy_clk.c drm/sun4i: Add support for second clock parent to DW HDMI PHY clk driver 2018-06-27 21:44:02 +02:00
sun8i_hdmi_phy.c drm/sun4i: Fix sun8i HDMI PHY configuration for > 148.5 MHz 2019-05-16 10:44:52 +02:00
sun8i_mixer.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun8i_mixer.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun8i_tcon_top.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun8i_tcon_top.h drm/sun4i: tcon-top: Add helpers for mux switching 2018-07-11 09:54:54 +02:00
sun8i_ui_layer.c drm/sun4i: drop use of drmP.h 2019-07-17 12:52:45 +02:00
sun8i_ui_layer.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun8i_ui_scaler.c drm/sun4i: Add basic support for DE3 2018-11-05 11:48:23 +01:00
sun8i_ui_scaler.h drm/sun4i: Add basic support for DE3 2018-11-05 11:48:23 +01:00
sun8i_vi_layer.c drm/sun4i: sun8i-csc: Add support for color encoding and range 2019-07-20 07:38:09 +02:00
sun8i_vi_layer.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sun8i_vi_scaler.c drm/sun4i: Add basic support for DE3 2018-11-05 11:48:23 +01:00
sun8i_vi_scaler.h drm/sun4i: Add basic support for DE3 2018-11-05 11:48:23 +01:00
sunxi_engine.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00