build/patch/kernel/archive/sunxi-6.2/patches.megous/drm-sun4i-tcon-hand-over-the-duty-to-keep-TCON0-clock-to-CCU-on.patch

77 lines
2.9 KiB
Diff

From aaa1465c9f277628d4e0c9d08289fba7cf43416e Mon Sep 17 00:00:00 2001
From: Ondrej Jirman <megi@xff.cz>
Date: Fri, 3 Jun 2022 19:22:34 +0200
Subject: [PATCH 201/391] drm/sun4i: tcon: hand over the duty to keep TCON0
clock to CCU on A64
As the A64 CCU driver has already the ability to keep TCON0 clock stable
when HDMI changes its parent's clock, do not protect TCON0 clock on A64
in the TCON driver to allow PLL-Video0 gets changed by HDMI (the CCU
will then restore the TCON0 clock rate).
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
# Conflicts:
# drivers/gpu/drm/sun4i/sun4i_tcon.c
---
drivers/gpu/drm/sun4i/sun4i_tcon.c | 15 +++++++++++++--
drivers/gpu/drm/sun4i/sun4i_tcon.h | 1 +
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index efe3eb7b7..057714a6a 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -108,9 +108,11 @@ static void sun4i_tcon_channel_set_status(struct sun4i_tcon *tcon, int channel,
if (enabled) {
clk_prepare_enable(clk);
- clk_rate_exclusive_get(clk);
+ if (!tcon->quirks->clk_kept_by_ccu)
+ clk_rate_exclusive_get(clk);
} else {
- clk_rate_exclusive_put(clk);
+ if (!tcon->quirks->clk_kept_by_ccu)
+ clk_rate_exclusive_put(clk);
clk_disable_unprepare(clk);
}
}
@@ -1551,6 +1553,14 @@ static const struct sun4i_tcon_quirks sun8i_a33_quirks = {
.supports_lvds = true,
};
+static const struct sun4i_tcon_quirks sun50i_a64_lcd_quirks = {
+ .supports_lvds = true,
+ .has_channel_0 = true,
+ .clk_kept_by_ccu = true,
+ .dclk_min_div = 1,
+ .setup_lvds_phy = sun6i_tcon_setup_lvds_phy,
+};
+
static const struct sun4i_tcon_quirks sun8i_a83t_lcd_quirks = {
.supports_lvds = true,
.has_channel_0 = true,
@@ -1609,6 +1619,7 @@ const struct of_device_id sun4i_tcon_of_table[] = {
{ .compatible = "allwinner,sun9i-a80-tcon-tv", .data = &sun9i_a80_tcon_tv_quirks },
{ .compatible = "allwinner,sun20i-d1-tcon-lcd", .data = &sun20i_d1_lcd_quirks },
{ .compatible = "allwinner,sun20i-d1-tcon-tv", .data = &sun8i_r40_tv_quirks },
+ { .compatible = "allwinner,sun50i-a64-tcon-lcd", .data = &sun50i_a64_lcd_quirks },
{ }
};
MODULE_DEVICE_TABLE(of, sun4i_tcon_of_table);
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h
index 97df39db2..745e1c473 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.h
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h
@@ -250,6 +250,7 @@ struct sun4i_tcon_quirks {
bool needs_edp_reset; /* a80 edp reset needed for tcon0 access */
bool supports_lvds; /* Does the TCON support an LVDS output? */
bool polarity_in_ch0; /* some tcon1 channels have polarity bits in tcon0 pol register */
+ bool clk_kept_by_ccu; /* On A64 we rely on CCU to keep TCON0 clock stable */
u8 dclk_min_div; /* minimum divider for TCON0 DCLK */
/* callback to handle tcon muxing options */
--
2.35.3