From e93fc4ed811c7dcc6b0c93716f760431fc645ba2 Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Thu, 26 Dec 2019 15:48:09 +0100 Subject: [PATCH] drm/vc4: crtc: Move the cob allocation outside of bind The COB allocation depends on the HVS channel used for a given pixelvalve. While the channel allocation was entirely static in vc4, vc5 changes that and at bind time, a pixelvalve can be assigned to multiple HVS channels. Let's prepare that rework by allocating the COB when it's actually needed. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_crtc.c | 39 +++++++++++++++++----------------- drivers/gpu/drm/vc4/vc4_drv.h | 2 -- 2 files changed, 20 insertions(+), 21 deletions(-) --- a/drivers/gpu/drm/vc4/vc4_crtc.c +++ b/drivers/gpu/drm/vc4/vc4_crtc.c @@ -65,6 +65,23 @@ static const struct debugfs_reg32 crtc_r VC4_REG32(PV_HACT_ACT), }; +static unsigned int +vc4_crtc_get_cob_allocation(struct vc4_crtc *vc4_crtc, unsigned int channel) +{ + struct drm_device *drm = vc4_crtc->base.dev; + struct vc4_dev *vc4 = to_vc4_dev(drm); + + u32 dispbase = HVS_READ(SCALER_DISPBASEX(channel)); + /* Top/base are supposed to be 4-pixel aligned, but the + * Raspberry Pi firmware fills the low bits (which are + * presumably ignored). + */ + u32 top = VC4_GET_FIELD(dispbase, SCALER_DISPBASEX_TOP) & ~3; + u32 base = VC4_GET_FIELD(dispbase, SCALER_DISPBASEX_BASE) & ~3; + + return top - base + 4; +} + bool vc4_crtc_get_scanoutpos(struct drm_device *dev, unsigned int crtc_id, bool in_vblank_irq, int *vpos, int *hpos, ktime_t *stime, ktime_t *etime, @@ -73,6 +90,7 @@ bool vc4_crtc_get_scanoutpos(struct drm_ struct vc4_dev *vc4 = to_vc4_dev(dev); struct drm_crtc *crtc = drm_crtc_from_index(dev, crtc_id); struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); + unsigned int cob_size; u32 val; int fifo_lines; int vblank_lines; @@ -108,8 +126,9 @@ bool vc4_crtc_get_scanoutpos(struct drm_ *hpos += mode->crtc_htotal / 2; } + cob_size = vc4_crtc_get_cob_allocation(vc4_crtc, vc4_crtc->channel); /* This is the offset we need for translating hvs -> pv scanout pos. */ - fifo_lines = vc4_crtc->cob_size / mode->crtc_hdisplay; + fifo_lines = cob_size / mode->crtc_hdisplay; if (fifo_lines > 0) ret = true; @@ -1104,22 +1123,6 @@ static void vc4_set_crtc_possible_masks( } } -static void -vc4_crtc_get_cob_allocation(struct vc4_crtc *vc4_crtc) -{ - struct drm_device *drm = vc4_crtc->base.dev; - struct vc4_dev *vc4 = to_vc4_dev(drm); - u32 dispbase = HVS_READ(SCALER_DISPBASEX(vc4_crtc->channel)); - /* Top/base are supposed to be 4-pixel aligned, but the - * Raspberry Pi firmware fills the low bits (which are - * presumably ignored). - */ - u32 top = VC4_GET_FIELD(dispbase, SCALER_DISPBASEX_TOP) & ~3; - u32 base = VC4_GET_FIELD(dispbase, SCALER_DISPBASEX_BASE) & ~3; - - vc4_crtc->cob_size = top - base + 4; -} - static int vc4_crtc_bind(struct device *dev, struct device *master, void *data) { struct platform_device *pdev = to_platform_device(dev); @@ -1174,8 +1177,6 @@ static int vc4_crtc_bind(struct device * */ drm_crtc_enable_color_mgmt(crtc, 0, true, crtc->gamma_size); - vc4_crtc_get_cob_allocation(vc4_crtc); - CRTC_WRITE(PV_INTEN, 0); CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START); ret = devm_request_irq(dev, platform_get_irq(pdev, 0), --- a/drivers/gpu/drm/vc4/vc4_drv.h +++ b/drivers/gpu/drm/vc4/vc4_drv.h @@ -477,8 +477,6 @@ struct vc4_crtc { u8 lut_r[256]; u8 lut_g[256]; u8 lut_b[256]; - /* Size in pixels of the COB memory allocated to this CRTC. */ - u32 cob_size; struct drm_pending_vblank_event *event;