[PATCH v4 14/20] clk: starfive: jh7110-vout: Allow pixel clock rate propagation
From: Michal Wilczynski <m.wilczynski@samsung.com>
Date: 2026-09-15 15:32:42
Also in:
dri-devel, linux-arm-kernel, linux-clk, linux-phy, linux-riscv, linux-rockchip, lkml
Subsystem:
common clk framework, starfive jh71x0 clock drivers, the rest · Maintainers:
Stephen Boyd, Brian Masney, Jerome Brunet, Emil Renner Berthing, Hal Feng, Linus Torvalds
The dc8200_pix0 and dc8200_pix1 MUXes feed the display controller, and the rate they carry is ultimately produced by the HDMI PHY, which registers hdmitx0_pixelclk as a clock provider. Add CLK_SET_RATE_PARENT to both MUXes so a rate requested on them reaches that parent, instead of being clamped to whatever rate the parent already happens to run at. Co-developed-by: Dominique Belhachemi <redacted> Signed-off-by: Dominique Belhachemi <redacted> Reviewed-by: Joshua Peisach <redacted> Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com> --- drivers/clk/starfive/clk-starfive-jh7110-vout.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/starfive/clk-starfive-jh7110-vout.c b/drivers/clk/starfive/clk-starfive-jh7110-vout.c
index bad20d5d794a72f071b4d547b7304786a8ba9afa..aeba42cd3c44ba205ced52b1826d2d2de82ad78f 100644
--- a/drivers/clk/starfive/clk-starfive-jh7110-vout.c
+++ b/drivers/clk/starfive/clk-starfive-jh7110-vout.c@@ -40,10 +40,12 @@ static const struct jh71x0_clk_data jh7110_voutclk_data[] = { JH71X0_GATE(JH7110_VOUTCLK_DC8200_AXI, "dc8200_axi", 0, JH7110_VOUTCLK_VOUT_TOP_AXI), JH71X0_GATE(JH7110_VOUTCLK_DC8200_CORE, "dc8200_core", 0, JH7110_VOUTCLK_VOUT_TOP_AXI), JH71X0_GATE(JH7110_VOUTCLK_DC8200_AHB, "dc8200_ahb", 0, JH7110_VOUTCLK_VOUT_TOP_AHB), - JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX0, "dc8200_pix0", 0, 2, + JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX0, "dc8200_pix0", + CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT, 2, JH7110_VOUTCLK_DC8200_PIX, JH7110_VOUTCLK_HDMITX0_PIXELCLK), - JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX1, "dc8200_pix1", 0, 2, + JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX1, "dc8200_pix1", + CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT, 2, JH7110_VOUTCLK_DC8200_PIX, JH7110_VOUTCLK_HDMITX0_PIXELCLK), /* LCD */
--
2.34.1