diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0557-drm-vc4-crtc-Add-function-to-compute-FIFO-level-bits.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0557-drm-vc4-crtc-Add-function-to-compute-FIFO-level-bits.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0557-drm-vc4-crtc-Add-function-to-compute-FIFO-level-bits.patch b/target/linux/bcm27xx/patches-5.4/950-0557-drm-vc4-crtc-Add-function-to-compute-FIFO-level-bits.patch new file mode 100644 index 0000000000..77952c0eea --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0557-drm-vc4-crtc-Add-function-to-compute-FIFO-level-bits.patch @@ -0,0 +1,44 @@ +From 2c241c25b76d105f798881e1a3c6e3c09c3b27ff Mon Sep 17 00:00:00 2001 +From: Maxime Ripard <maxime@cerno.tech> +Date: Mon, 13 Jan 2020 13:40:37 +0100 +Subject: [PATCH] drm/vc4: crtc: Add function to compute FIFO level + bits + +The longer FIFOs in vc5 pixelvalves means that the FIFO full level +doesn't fit in the original register field and that we also have a +secondary field. In order to prepare for this, let's move the registers +fill part to a helper function. + +Signed-off-by: Maxime Ripard <maxime@cerno.tech> +--- + drivers/gpu/drm/vc4/vc4_crtc.c | 11 +++++++++-- + 1 file changed, 9 insertions(+), 2 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_crtc.c ++++ b/drivers/gpu/drm/vc4/vc4_crtc.c +@@ -277,6 +277,14 @@ static u32 vc4_get_fifo_full_level(struc + } + } + ++static u32 vc4_crtc_get_fifo_full_level_bits(struct vc4_crtc *vc4_crtc, ++ u32 format) ++{ ++ u32 level = vc4_get_fifo_full_level(vc4_crtc, format); ++ return VC4_SET_FIELD(level & 0x3f, ++ PV_CONTROL_FIFO_LEVEL); ++} ++ + /* + * Returns the encoder attached to the CRTC. + * +@@ -377,9 +385,8 @@ static void vc4_crtc_config_pv(struct dr + CRTC_WRITE(PV_HACT_ACT, mode->hdisplay * pixel_rep); + + CRTC_WRITE(PV_CONTROL, ++ vc4_crtc_get_fifo_full_level_bits(vc4_crtc, format) | + VC4_SET_FIELD(format, PV_CONTROL_FORMAT) | +- VC4_SET_FIELD(vc4_get_fifo_full_level(vc4_crtc, format), +- PV_CONTROL_FIFO_LEVEL) | + VC4_SET_FIELD(pixel_rep - 1, PV_CONTROL_PIXEL_REP) | + PV_CONTROL_CLR_AT_START | + PV_CONTROL_TRIGGER_UNDERFLOW | |