diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0576-drm-vc4-hdmi-Add-reset-callback.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0576-drm-vc4-hdmi-Add-reset-callback.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0576-drm-vc4-hdmi-Add-reset-callback.patch b/target/linux/bcm27xx/patches-5.4/950-0576-drm-vc4-hdmi-Add-reset-callback.patch new file mode 100644 index 0000000000..18c11aba45 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0576-drm-vc4-hdmi-Add-reset-callback.patch @@ -0,0 +1,66 @@ +From 3cf4a365b833d7a2e7622ad5569b9d54aebbe593 Mon Sep 17 00:00:00 2001 +From: Maxime Ripard <maxime@cerno.tech> +Date: Thu, 19 Dec 2019 16:25:26 +0100 +Subject: [PATCH] drm/vc4: hdmi: Add reset callback + +The BCM2711 and BCM283x HDMI controllers use a slightly different reset +sequence, so let's add a callback to reset the controller. + +Signed-off-by: Maxime Ripard <maxime@cerno.tech> +--- + drivers/gpu/drm/vc4/vc4_hdmi.c | 17 ++++++++++++----- + drivers/gpu/drm/vc4/vc4_hdmi.h | 3 +++ + 2 files changed, 15 insertions(+), 5 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_hdmi.c ++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c +@@ -68,6 +68,15 @@ static int vc4_hdmi_debugfs_regs(struct + return 0; + } + ++static void vc4_hdmi_reset(struct vc4_hdmi *vc4_hdmi) ++{ ++ HDMI_WRITE(HDMI_SW_RESET_CONTROL, ++ VC4_HDMI_SW_RESET_HDMI | ++ VC4_HDMI_SW_RESET_FORMAT_DETECT); ++ ++ HDMI_WRITE(HDMI_SW_RESET_CONTROL, 0); ++} ++ + static enum drm_connector_status + vc4_hdmi_connector_detect(struct drm_connector *connector, bool force) + { +@@ -372,11 +381,8 @@ static void vc4_hdmi_encoder_enable(stru + return; + } + +- HDMI_WRITE(HDMI_SW_RESET_CONTROL, +- VC4_HDMI_SW_RESET_HDMI | +- VC4_HDMI_SW_RESET_FORMAT_DETECT); +- +- HDMI_WRITE(HDMI_SW_RESET_CONTROL, 0); ++ if (vc4_hdmi->variant->reset) ++ vc4_hdmi->variant->reset(vc4_hdmi); + + /* PHY should be in reset, like + * vc4_hdmi_encoder_disable() does. +@@ -1422,6 +1428,7 @@ static const struct vc4_hdmi_variant bcm + .num_registers = ARRAY_SIZE(vc4_hdmi_fields), + + .init_resources = vc4_hdmi_init_resources, ++ .reset = vc4_hdmi_reset, + }; + + static const struct of_device_id vc4_hdmi_dt_match[] = { +--- a/drivers/gpu/drm/vc4/vc4_hdmi.h ++++ b/drivers/gpu/drm/vc4/vc4_hdmi.h +@@ -35,6 +35,9 @@ struct vc4_hdmi_variant { + * clocks, etc) for that variant. + */ + int (*init_resources)(struct vc4_hdmi *vc4_hdmi); ++ ++ /* Callback to reset the HDMI block */ ++ void (*reset)(struct vc4_hdmi *vc4_hdmi); + }; + + /* HDMI audio information */ |