diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0441-drm-vc4-Add-support-for-feeding-DSI-encoders-from-th.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0441-drm-vc4-Add-support-for-feeding-DSI-encoders-from-th.patch | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0441-drm-vc4-Add-support-for-feeding-DSI-encoders-from-th.patch b/target/linux/brcm2708/patches-4.4/0441-drm-vc4-Add-support-for-feeding-DSI-encoders-from-th.patch new file mode 100644 index 0000000000..7b36ff9af8 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0441-drm-vc4-Add-support-for-feeding-DSI-encoders-from-th.patch @@ -0,0 +1,96 @@ +From c50d2b2fc772468306a8b30159924f19edab4901 Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Wed, 10 Feb 2016 16:17:29 -0800 +Subject: [PATCH] drm/vc4: Add support for feeding DSI encoders from the pixel + valve. + +Signed-off-by: Eric Anholt <eric@anholt.net> +--- + drivers/gpu/drm/vc4/vc4_crtc.c | 30 +++++++++++++++++------------- + drivers/gpu/drm/vc4/vc4_regs.h | 2 ++ + 2 files changed, 19 insertions(+), 13 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_crtc.c ++++ b/drivers/gpu/drm/vc4/vc4_crtc.c +@@ -210,38 +210,40 @@ static u32 vc4_get_fifo_full_level(u32 f + } + + /* +- * Returns the clock select bit for the connector attached to the +- * CRTC. ++ * Returns the encoder attached to the CRTC. ++ * ++ * VC4 can only scan out to one encoder at a type, while the DRM core ++ * allows drivers to push pixels to more than one encoder from the ++ * same CRTC. + */ +-static int vc4_get_clock_select(struct drm_crtc *crtc) ++static struct drm_encoder *vc4_get_crtc_encoder(struct drm_crtc *crtc) + { + struct drm_connector *connector; + + drm_for_each_connector(connector, crtc->dev) { + if (connector->state->crtc == crtc) { +- struct drm_encoder *encoder = connector->encoder; +- struct vc4_encoder *vc4_encoder = +- to_vc4_encoder(encoder); +- +- return vc4_encoder->clock_select; ++ return connector->encoder; + } + } + +- return -1; ++ return NULL; + } + + static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc) + { + struct drm_device *dev = crtc->dev; + struct vc4_dev *vc4 = to_vc4_dev(dev); ++ struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc); ++ struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder); + struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); + struct drm_crtc_state *state = crtc->state; + struct drm_display_mode *mode = &state->adjusted_mode; + bool interlace = mode->flags & DRM_MODE_FLAG_INTERLACE; + u32 vactive = (mode->vdisplay >> (interlace ? 1 : 0)); +- u32 format = PV_CONTROL_FORMAT_24; +- bool debug_dump_regs = false; +- int clock_select = vc4_get_clock_select(crtc); ++ bool is_dsi = (vc4_encoder->type == VC4_ENCODER_TYPE_DSI0 || ++ vc4_encoder->type == VC4_ENCODER_TYPE_DSI1); ++ u32 format = is_dsi ? PV_CONTROL_FORMAT_DSIV_24 : PV_CONTROL_FORMAT_24; ++ bool debug_dump_regs = true; + + if (debug_dump_regs) { + DRM_INFO("CRTC %d regs before:\n", drm_crtc_index(crtc)); +@@ -289,6 +291,7 @@ static void vc4_crtc_mode_set_nofb(struc + + CRTC_WRITE(PV_V_CONTROL, + PV_VCONTROL_CONTINUOUS | ++ (is_dsi ? PV_VCONTROL_DSI : 0) | + (interlace ? PV_VCONTROL_INTERLACE : 0)); + + CRTC_WRITE(PV_CONTROL, +@@ -298,7 +301,8 @@ static void vc4_crtc_mode_set_nofb(struc + PV_CONTROL_CLR_AT_START | + PV_CONTROL_TRIGGER_UNDERFLOW | + PV_CONTROL_WAIT_HSTART | +- VC4_SET_FIELD(clock_select, PV_CONTROL_CLK_SELECT) | ++ VC4_SET_FIELD(vc4_encoder->clock_select, ++ PV_CONTROL_CLK_SELECT) | + PV_CONTROL_FIFO_CLR | + PV_CONTROL_EN); + +--- a/drivers/gpu/drm/vc4/vc4_regs.h ++++ b/drivers/gpu/drm/vc4/vc4_regs.h +@@ -184,6 +184,8 @@ + + #define PV_V_CONTROL 0x04 + # define PV_VCONTROL_INTERLACE BIT(4) ++# define PV_VCONTROL_DSI BIT(3) ++# define PV_VCONTROL_COMMAND BIT(2) + # define PV_VCONTROL_CONTINUOUS BIT(1) + # define PV_VCONTROL_VIDEN BIT(0) + |