Merge "drm/dp: do not read SET_POWER register during link power up" (e397da0e) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/gpu/drm/drm_dp_helper.c

+1 −8

Original line number	Diff line number	Diff line
		@@ -358,20 +358,13 @@ EXPORT_SYMBOL(drm_dp_link_probe);
		*/
		int drm_dp_link_power_up(struct drm_dp_aux aux, struct drm_dp_link link)
		{
		u8 value;
		u8 value = DP_SET_POWER_D0;
		int err;

		/* DP_SET_POWER register is only available on DPCD v1.1 and later */
		if (link->revision < 0x11)
		return 0;

		err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);
		if (err < 0)
		return err;

		value &= ~DP_SET_POWER_MASK;
		value \|= DP_SET_POWER_D0;

		err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);
		if (err < 0)
		return err;