drm: rcar-du: dw-hdmi: Reject modes with a too high clock frequency (f41cb153) · Commits · 戴 / test

Implement a .mode_valid() handler in the R-Car glue layer to reject modes with an unsupported clock frequency. Signed-off-by:

drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c

+15 −0

Original line number	Diff line number	Diff line
		@@ -35,6 +35,20 @@ static const struct rcar_hdmi_phy_params rcar_hdmi_phy_params[] = {
		{ ~0UL, 0x0000, 0x0000, 0x0000 },
		};

		static enum drm_mode_status
		rcar_hdmi_mode_valid(struct drm_connector *connector,
		const struct drm_display_mode *mode)
		{
		/*
		* The maximum supported clock frequency is 297 MHz, as shown in the PHY
		* parameters table.
		*/
		if (mode->clock > 297000)
		return MODE_CLOCK_HIGH;

		return MODE_OK;
		}

		static int rcar_hdmi_phy_configure(struct dw_hdmi *hdmi,
		const struct dw_hdmi_plat_data *pdata,
		unsigned long mpixelclock)
		@@ -59,6 +73,7 @@ static int rcar_hdmi_phy_configure(struct dw_hdmi *hdmi,
		}

		static const struct dw_hdmi_plat_data rcar_dw_hdmi_plat_data = {
		.mode_valid = rcar_hdmi_mode_valid,
		.configure_phy = rcar_hdmi_phy_configure,
		};