| Message ID | 20240426160256.3089978-2-jbrunet@baylibre.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/meson: fix hdmi auxiliary system operation without display | expand |
On 26/04/2024 18:02, Jerome Brunet wrote: > 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: 3f68be7d8e96 ("drm/meson: Add support for HDMI encoder and DW-HDMI bridge + PHY") > Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> > --- > drivers/gpu/drm/meson/meson_dw_hdmi.c | 51 +++++++++------------------ > 1 file changed, 17 insertions(+), 34 deletions(-) > > diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c > index 5a9538bc0e26..a83d93078537 100644 > --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c > +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c > @@ -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); Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c index 5a9538bc0e26..a83d93078537 100644 --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c @@ -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);
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: 3f68be7d8e96 ("drm/meson: Add support for HDMI encoder and DW-HDMI bridge + PHY") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> --- drivers/gpu/drm/meson/meson_dw_hdmi.c | 51 +++++++++------------------ 1 file changed, 17 insertions(+), 34 deletions(-)