| Message ID | 20240203165307.7806-4-aford173@gmail.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | soc: imx8mp: Add support for HDMI | expand |
On Sat, 03 Feb 2024 10:52:43 -0600, Adam Ford wrote: > Per guidance from the NXP downstream kernel, if the clock is > disabled before HDMI/LCDIF probe, LCDIF will not get pixel > clock from HDMI PHY and throw an error: > > [CRTC:39:crtc-2] vblank wait timed out > WARNING: CPU: 2 PID: 9 at drivers/gpu/drm/drm_atomic_helper.c: > 1634 drm_atomic_helper_wait_for_vblanks.part.0+0x23c/0x260 > > Fix this by adding the fdcc clock to the hdmi_blk_ctrl. This > should be safe, since neither this power domain nor the dependent > HDMI and LCDIF drivers been enabled or added to the SoC device > tree yet. > > According to Sandor Yu from NXP, "the FDCC clock is not for HDMITX > in desgin, but it is part of HDMI domain that needed by HDMITX. > So I think it is reasonable added it to the power domain driver." > > The driver also supports two power domains which are missing from the binding > that also fix an issue with resuming from suspend. > > Signed-off-by: Adam Ford <aford173@gmail.com> > --- > V2: Update commit message to both show error and give a bit more > background. > Add missing power domains hdcp and hdrv as pointed out by Marek Vasut > --- > .../soc/imx/fsl,imx8mp-hdmi-blk-ctrl.yaml | 22 ++++++++++++------- > 1 file changed, 14 insertions(+), 8 deletions(-) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/soc/imx/fsl,imx8mp-hdmi-blk-ctrl.yaml b/Documentation/devicetree/bindings/soc/imx/fsl,imx8mp-hdmi-blk-ctrl.yaml index 1be4ce2a45e8..bd1cdaa4f54b 100644 --- a/Documentation/devicetree/bindings/soc/imx/fsl,imx8mp-hdmi-blk-ctrl.yaml +++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx8mp-hdmi-blk-ctrl.yaml @@ -27,8 +27,8 @@ properties: const: 1 power-domains: - minItems: 8 - maxItems: 8 + minItems: 10 + maxItems: 10 power-domain-names: items: @@ -40,10 +40,12 @@ properties: - const: trng - const: hdmi-tx - const: hdmi-tx-phy + - const: hdcp + - const: hrv clocks: - minItems: 4 - maxItems: 4 + minItems: 5 + maxItems: 5 clock-names: items: @@ -51,6 +53,7 @@ properties: - const: axi - const: ref_266m - const: ref_24m + - const: fdcc interconnects: maxItems: 3 @@ -82,12 +85,15 @@ examples: clocks = <&clk IMX8MP_CLK_HDMI_APB>, <&clk IMX8MP_CLK_HDMI_ROOT>, <&clk IMX8MP_CLK_HDMI_REF_266M>, - <&clk IMX8MP_CLK_HDMI_24M>; - clock-names = "apb", "axi", "ref_266m", "ref_24m"; + <&clk IMX8MP_CLK_HDMI_24M>, + <&clk IMX8MP_CLK_HDMI_FDCC_TST>; + clock-names = "apb", "axi", "ref_266m", "ref_24m", "fdcc"; power-domains = <&pgc_hdmimix>, <&pgc_hdmimix>, <&pgc_hdmimix>, <&pgc_hdmimix>, <&pgc_hdmimix>, <&pgc_hdmimix>, - <&pgc_hdmimix>, <&pgc_hdmi_phy>; + <&pgc_hdmimix>, <&pgc_hdmi_phy>, + <&pgc_hdmimix>, <&pgc_hdmimix>; power-domain-names = "bus", "irqsteer", "lcdif", "pai", "pvi", "trng", - "hdmi-tx", "hdmi-tx-phy"; + "hdmi-tx", "hdmi-tx-phy", + "hdcp", "hrv"; #power-domain-cells = <1>; };
Per guidance from the NXP downstream kernel, if the clock is disabled before HDMI/LCDIF probe, LCDIF will not get pixel clock from HDMI PHY and throw an error: [CRTC:39:crtc-2] vblank wait timed out WARNING: CPU: 2 PID: 9 at drivers/gpu/drm/drm_atomic_helper.c: 1634 drm_atomic_helper_wait_for_vblanks.part.0+0x23c/0x260 Fix this by adding the fdcc clock to the hdmi_blk_ctrl. This should be safe, since neither this power domain nor the dependent HDMI and LCDIF drivers been enabled or added to the SoC device tree yet. According to Sandor Yu from NXP, "the FDCC clock is not for HDMITX in desgin, but it is part of HDMI domain that needed by HDMITX. So I think it is reasonable added it to the power domain driver." The driver also supports two power domains which are missing from the binding that also fix an issue with resuming from suspend. Signed-off-by: Adam Ford <aford173@gmail.com> --- V2: Update commit message to both show error and give a bit more background. Add missing power domains hdcp and hdrv as pointed out by Marek Vasut --- .../soc/imx/fsl,imx8mp-hdmi-blk-ctrl.yaml | 22 ++++++++++++------- 1 file changed, 14 insertions(+), 8 deletions(-)