diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0285-drm-vc4-Bring-HDMI-up-from-power-off-if-necessary.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0285-drm-vc4-Bring-HDMI-up-from-power-off-if-necessary.patch | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0285-drm-vc4-Bring-HDMI-up-from-power-off-if-necessary.patch b/target/linux/brcm2708/patches-4.4/0285-drm-vc4-Bring-HDMI-up-from-power-off-if-necessary.patch deleted file mode 100644 index 9754dee26a..0000000000 --- a/target/linux/brcm2708/patches-4.4/0285-drm-vc4-Bring-HDMI-up-from-power-off-if-necessary.patch +++ /dev/null @@ -1,72 +0,0 @@ -From 72babc2af3130870d9ef1ccfdf61224a8e834935 Mon Sep 17 00:00:00 2001 -From: Eric Anholt <eric@anholt.net> -Date: Fri, 12 Feb 2016 14:15:14 -0800 -Subject: [PATCH] drm/vc4: Bring HDMI up from power off if necessary. - -If the firmware hadn't brought up HDMI for us, we need to do its -power-on reset sequence (reset HD and and clear its STANDBY bits, -reset HDMI, and leave the PHY disabled). - -Signed-off-by: Eric Anholt <eric@anholt.net> -(cherry picked from commit 851479ad5927b7b1aa141ca9dedb897a7bce2b1d) ---- - drivers/gpu/drm/vc4/vc4_hdmi.c | 29 ++++++++++++++++++++++++++++- - drivers/gpu/drm/vc4/vc4_regs.h | 2 ++ - 2 files changed, 30 insertions(+), 1 deletion(-) - ---- a/drivers/gpu/drm/vc4/vc4_hdmi.c -+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c -@@ -497,6 +497,16 @@ static int vc4_hdmi_bind(struct device * - goto err_put_i2c; - } - -+ /* This is the rate that is set by the firmware. The number -+ * needs to be a bit higher than the pixel clock rate -+ * (generally 148.5Mhz). -+ */ -+ ret = clk_set_rate(hdmi->hsm_clock, 163682864); -+ if (ret) { -+ DRM_ERROR("Failed to set HSM clock rate: %d\n", ret); -+ goto err_unprepare_pix; -+ } -+ - ret = clk_prepare_enable(hdmi->hsm_clock); - if (ret) { - DRM_ERROR("Failed to turn on HDMI state machine clock: %d\n", -@@ -518,7 +528,24 @@ static int vc4_hdmi_bind(struct device * - vc4->hdmi = hdmi; - - /* HDMI core must be enabled. */ -- WARN_ON_ONCE((HD_READ(VC4_HD_M_CTL) & VC4_HD_M_ENABLE) == 0); -+ if (!(HD_READ(VC4_HD_M_CTL) & VC4_HD_M_ENABLE)) { -+ HD_WRITE(VC4_HD_M_CTL, VC4_HD_M_SW_RST); -+ udelay(1); -+ HD_WRITE(VC4_HD_M_CTL, 0); -+ -+ HD_WRITE(VC4_HD_M_CTL, VC4_HD_M_ENABLE); -+ -+ HDMI_WRITE(VC4_HDMI_SW_RESET_CONTROL, -+ VC4_HDMI_SW_RESET_HDMI | -+ VC4_HDMI_SW_RESET_FORMAT_DETECT); -+ -+ HDMI_WRITE(VC4_HDMI_SW_RESET_CONTROL, 0); -+ -+ /* PHY should be in reset, like -+ * vc4_hdmi_encoder_disable() does. -+ */ -+ HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0xf << 16); -+ } - - drm_encoder_init(drm, hdmi->encoder, &vc4_hdmi_encoder_funcs, - DRM_MODE_ENCODER_TMDS); ---- a/drivers/gpu/drm/vc4/vc4_regs.h -+++ b/drivers/gpu/drm/vc4/vc4_regs.h -@@ -456,6 +456,8 @@ - #define VC4_HDMI_TX_PHY_RESET_CTL 0x2c0 - - #define VC4_HD_M_CTL 0x00c -+# define VC4_HD_M_REGISTER_FILE_STANDBY (3 << 6) -+# define VC4_HD_M_RAM_STANDBY (3 << 4) - # define VC4_HD_M_SW_RST BIT(2) - # define VC4_HD_M_ENABLE BIT(0) - |