diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_hdmi.c | 12 | ||||
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_hdmi_regs.h | 1 |
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c index 8ec1ea4477e2..ba812ef2c9d1 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -16,6 +16,7 @@ #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_edid.h> +#include <linux/arm-smccc.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/hdmi.h> @@ -230,6 +231,17 @@ static void mtk_hdmi_hw_vid_black(struct mtk_hdmi *hdmi, bool black) static void mtk_hdmi_hw_make_reg_writable(struct mtk_hdmi *hdmi, bool enable) { + struct arm_smccc_res res; + + /* + * MT8173 HDMI hardware has an output control bit to enable/disable HDMI + * output. This bit can only be controlled in ARM supervisor mode. + * The ARM trusted firmware provides an API for the HDMI driver to set + * this control bit to enable HDMI output in supervisor mode. + */ + arm_smccc_smc(MTK_SIP_SET_AUTHORIZED_SECURE_REG, 0x14000904, 0x80000000, + 0, 0, 0, 0, 0, &res); + regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20, HDMI_PCLK_FREE_RUN, enable ? HDMI_PCLK_FREE_RUN : 0); regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG1C, diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_regs.h b/drivers/gpu/drm/mediatek/mtk_hdmi_regs.h index 209fbe194442..a5cb07d12c9c 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi_regs.h +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_regs.h @@ -234,4 +234,5 @@ #define MHL_SYNC_AUTO_EN BIT(30) #define HDMI_PCLK_FREE_RUN BIT(31) +#define MTK_SIP_SET_AUTHORIZED_SECURE_REG 0x82000001 #endif |