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drm/meson: dw-hdmi: power up phy on device init 

The phy is not in a useful state right after init. It will become useful,
including for auxiliary function such as CEC or ARC, after the first mode
is set. This is a problem on systems where the display is using another
interface like DSI or CVBS.

This change refactor the init and mode change callback to power up the PHY
on init and leave only what is necessary for mode changes in the related
function. This is enough to fix CEC operation when HDMI display is not
enabled.

Fixes: 3f68be7d8e ("drm/meson: Add support for HDMI encoder and DW-HDMI bridge + PHY")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240426160256.3089978-2-jbrunet@baylibre.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240426160256.3089978-2-jbrunet@baylibre.com
This commit is contained in:
Jerome Brunet 2024-04-26 18:02:53 +02:00 committed by Neil Armstrong
parent da85f0aaa9
commit 04703bfd7f
1 changed files with 17 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
drivers/gpu/drm/meson/meson_dw_hdmi.c
View File

@ -384,26 +384,6 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
dw_hdmi_bus_fmt_is_420(hdmi))
mode_is_420 = true;
/* Enable clocks */
regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, 0xffff, 0x100);
/* Bring HDMITX MEM output of power down */
regmap_update_bits(priv->hhi, HHI_MEM_PD_REG0, 0xff << 8, 0);
/* Bring out of reset */
dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_SW_RESET, 0);
/* Enable internal pixclk, tmds_clk, spdif_clk, i2s_clk, cecclk */
dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_CLK_CNTL,
0x3, 0x3);
/* Enable cec_clk and hdcp22_tmdsclk_en */
dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_CLK_CNTL,
0x3 << 4, 0x3 << 4);
/* Enable normal output to PHY */
dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_BIST_CNTL, BIT(12));
/* TMDS pattern setup */
if (mode->clock > 340000 && !mode_is_420) {
dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01,
@ -425,20 +405,6 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
/* Setup PHY parameters */
meson_hdmi_phy_setup_mode(dw_hdmi, mode, mode_is_420);
/* Setup PHY */
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
0xffff << 16, 0x0390 << 16);
/* BIT_INVERT */
if (dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxm-dw-hdmi") ||
dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-g12a-dw-hdmi"))
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
BIT(17), 0);
else
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
BIT(17), BIT(17));
/* Disable clock, fifo, fifo_wr */
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0);
@ -656,6 +622,23 @@ static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
meson_dw_hdmi->data->top_write(meson_dw_hdmi,
HDMITX_TOP_CLK_CNTL, 0xff);
/* Enable normal output to PHY */
meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_BIST_CNTL, BIT(12));
/* Setup PHY */
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
0xffff << 16, 0x0390 << 16);
/* BIT_INVERT */
if (dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-gxm-dw-hdmi") ||
dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-g12a-dw-hdmi"))
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
BIT(17), 0);
else
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
BIT(17), BIT(17));
/* Enable HDMI-TX Interrupt */
meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_INTR_STAT_CLR,
HDMITX_TOP_INTR_CORE);