From f5a8020903932624cf020dc72455a10a3e005087 Mon Sep 17 00:00:00 2001 From: Mario Kleiner Date: Sat, 23 Oct 2010 04:42:17 +0200 Subject: [PATCH] drm/kms/radeon: Add support for precise vblank timestamping. This patch adds new functions for use by the drm core: .get_vblank_timestamp() provides a precise timestamp for the end of the most recent (or current) vblank interval of a given crtc, as needed for the DRI2 implementation of the OML_sync_control extension. It is a thin wrapper around the drm function drm_calc_vbltimestamp_from_scanoutpos() which does almost all the work and is shared across drivers. .get_scanout_position() provides the current horizontal and vertical video scanout position and "in vblank" status of a given crtc, as needed by the drm for use by drm_calc_vbltimestamp_from_scanoutpos(). The function is also used by the dynamic gpu reclocking code to determine when it is safe to reclock inside vblank. For that purpose radeon_pm_in_vbl() is modified to accomodate a small change in the function prototype of the radeon_get_crtc_scanoutpos() which is hooked up to .get_scanout_position(). This code has been tested on AVIVO hardware, a RV530 (ATI Mobility Radeon X1600) in a Intel Core-2 Duo MacBookPro and some R600 variant (FireGL V7600) in a single cpu AMD Athlon 64 PC. Signed-off-by: Mario Kleiner Reviewed-by: Alex Deucher Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/radeon_display.c | 40 +++++++++++++------------ drivers/gpu/drm/radeon/radeon_drv.c | 8 +++++ drivers/gpu/drm/radeon/radeon_kms.c | 21 +++++++++++++ drivers/gpu/drm/radeon/radeon_mode.h | 7 ++--- drivers/gpu/drm/radeon/radeon_pm.c | 6 ++-- 5 files changed, 55 insertions(+), 27 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index 1df4dc6c063c..eeea7cbb9517 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -1019,7 +1019,7 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc, /* * Retrieve current video scanout position of crtc on a given gpu. * - * \param rdev Device to query. + * \param dev Device to query. * \param crtc Crtc to query. * \param *vpos Location where vertical scanout position should be stored. * \param *hpos Location where horizontal scanout position should go. @@ -1031,72 +1031,74 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc, * * \return Flags, or'ed together as follows: * - * RADEON_SCANOUTPOS_VALID = Query successfull. - * RADEON_SCANOUTPOS_INVBL = Inside vblank. - * RADEON_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of + * DRM_SCANOUTPOS_VALID = Query successfull. + * DRM_SCANOUTPOS_INVBL = Inside vblank. + * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of * this flag means that returned position may be offset by a constant but * unknown small number of scanlines wrt. real scanout position. * */ -int radeon_get_crtc_scanoutpos(struct radeon_device *rdev, int crtc, int *vpos, int *hpos) +int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, int *vpos, int *hpos) { u32 stat_crtc = 0, vbl = 0, position = 0; int vbl_start, vbl_end, vtotal, ret = 0; bool in_vbl = true; + struct radeon_device *rdev = dev->dev_private; + if (ASIC_IS_DCE4(rdev)) { if (crtc == 0) { vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END + EVERGREEN_CRTC0_REGISTER_OFFSET); position = RREG32(EVERGREEN_CRTC_STATUS_POSITION + EVERGREEN_CRTC0_REGISTER_OFFSET); - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } if (crtc == 1) { vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END + EVERGREEN_CRTC1_REGISTER_OFFSET); position = RREG32(EVERGREEN_CRTC_STATUS_POSITION + EVERGREEN_CRTC1_REGISTER_OFFSET); - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } if (crtc == 2) { vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END + EVERGREEN_CRTC2_REGISTER_OFFSET); position = RREG32(EVERGREEN_CRTC_STATUS_POSITION + EVERGREEN_CRTC2_REGISTER_OFFSET); - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } if (crtc == 3) { vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END + EVERGREEN_CRTC3_REGISTER_OFFSET); position = RREG32(EVERGREEN_CRTC_STATUS_POSITION + EVERGREEN_CRTC3_REGISTER_OFFSET); - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } if (crtc == 4) { vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END + EVERGREEN_CRTC4_REGISTER_OFFSET); position = RREG32(EVERGREEN_CRTC_STATUS_POSITION + EVERGREEN_CRTC4_REGISTER_OFFSET); - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } if (crtc == 5) { vbl = RREG32(EVERGREEN_CRTC_V_BLANK_START_END + EVERGREEN_CRTC5_REGISTER_OFFSET); position = RREG32(EVERGREEN_CRTC_STATUS_POSITION + EVERGREEN_CRTC5_REGISTER_OFFSET); - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } } else if (ASIC_IS_AVIVO(rdev)) { if (crtc == 0) { vbl = RREG32(AVIVO_D1CRTC_V_BLANK_START_END); position = RREG32(AVIVO_D1CRTC_STATUS_POSITION); - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } if (crtc == 1) { vbl = RREG32(AVIVO_D2CRTC_V_BLANK_START_END); position = RREG32(AVIVO_D2CRTC_STATUS_POSITION); - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } } else { /* Pre-AVIVO: Different encoding of scanout pos and vblank interval. */ @@ -1112,7 +1114,7 @@ int radeon_get_crtc_scanoutpos(struct radeon_device *rdev, int crtc, int *vpos, if (!(stat_crtc & 1)) in_vbl = false; - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } if (crtc == 1) { vbl = (RREG32(RADEON_CRTC2_V_TOTAL_DISP) & @@ -1122,7 +1124,7 @@ int radeon_get_crtc_scanoutpos(struct radeon_device *rdev, int crtc, int *vpos, if (!(stat_crtc & 1)) in_vbl = false; - ret |= RADEON_SCANOUTPOS_VALID; + ret |= DRM_SCANOUTPOS_VALID; } } @@ -1133,13 +1135,13 @@ int radeon_get_crtc_scanoutpos(struct radeon_device *rdev, int crtc, int *vpos, /* Valid vblank area boundaries from gpu retrieved? */ if (vbl > 0) { /* Yes: Decode. */ - ret |= RADEON_SCANOUTPOS_ACCURATE; + ret |= DRM_SCANOUTPOS_ACCURATE; vbl_start = vbl & 0x1fff; vbl_end = (vbl >> 16) & 0x1fff; } else { /* No: Fake something reasonable which gives at least ok results. */ - vbl_start = rdev->mode_info.crtcs[crtc]->base.mode.crtc_vdisplay; + vbl_start = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vdisplay; vbl_end = 0; } @@ -1155,7 +1157,7 @@ int radeon_get_crtc_scanoutpos(struct radeon_device *rdev, int crtc, int *vpos, /* Inside "upper part" of vblank area? Apply corrective offset if so: */ if (in_vbl && (*vpos >= vbl_start)) { - vtotal = rdev->mode_info.crtcs[crtc]->base.mode.crtc_vtotal; + vtotal = rdev->mode_info.crtcs[crtc]->base.hwmode.crtc_vtotal; *vpos = *vpos - vtotal; } @@ -1164,7 +1166,7 @@ int radeon_get_crtc_scanoutpos(struct radeon_device *rdev, int crtc, int *vpos, /* In vblank? */ if (in_vbl) - ret |= RADEON_SCANOUTPOS_INVBL; + ret |= DRM_SCANOUTPOS_INVBL; return ret; } diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index 88e4ea925900..32ec0cc6be92 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -66,6 +66,10 @@ int radeon_resume_kms(struct drm_device *dev); u32 radeon_get_vblank_counter_kms(struct drm_device *dev, int crtc); int radeon_enable_vblank_kms(struct drm_device *dev, int crtc); void radeon_disable_vblank_kms(struct drm_device *dev, int crtc); +int radeon_get_vblank_timestamp_kms(struct drm_device *dev, int crtc, + int *max_error, + struct timeval *vblank_time, + unsigned flags); void radeon_driver_irq_preinstall_kms(struct drm_device *dev); int radeon_driver_irq_postinstall_kms(struct drm_device *dev); void radeon_driver_irq_uninstall_kms(struct drm_device *dev); @@ -74,6 +78,8 @@ int radeon_dma_ioctl_kms(struct drm_device *dev, void *data, struct drm_file *file_priv); int radeon_gem_object_init(struct drm_gem_object *obj); void radeon_gem_object_free(struct drm_gem_object *obj); +extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, + int *vpos, int *hpos); extern struct drm_ioctl_desc radeon_ioctls_kms[]; extern int radeon_max_kms_ioctl; int radeon_mmap(struct file *filp, struct vm_area_struct *vma); @@ -277,6 +283,8 @@ static struct drm_driver kms_driver = { .get_vblank_counter = radeon_get_vblank_counter_kms, .enable_vblank = radeon_enable_vblank_kms, .disable_vblank = radeon_disable_vblank_kms, + .get_vblank_timestamp = radeon_get_vblank_timestamp_kms, + .get_scanout_position = radeon_get_crtc_scanoutpos, #if defined(CONFIG_DEBUG_FS) .debugfs_init = radeon_debugfs_init, .debugfs_cleanup = radeon_debugfs_cleanup, diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c index 8fbbe1c6ebbd..4bf423ca4c12 100644 --- a/drivers/gpu/drm/radeon/radeon_kms.c +++ b/drivers/gpu/drm/radeon/radeon_kms.c @@ -277,6 +277,27 @@ void radeon_disable_vblank_kms(struct drm_device *dev, int crtc) radeon_irq_set(rdev); } +int radeon_get_vblank_timestamp_kms(struct drm_device *dev, int crtc, + int *max_error, + struct timeval *vblank_time, + unsigned flags) +{ + struct drm_crtc *drmcrtc; + struct radeon_device *rdev = dev->dev_private; + + if (crtc < 0 || crtc >= dev->num_crtcs) { + DRM_ERROR("Invalid crtc %d\n", crtc); + return -EINVAL; + } + + /* Get associated drm_crtc: */ + drmcrtc = &rdev->mode_info.crtcs[crtc]->base; + + /* Helper routine in DRM core does all the work: */ + return drm_calc_vbltimestamp_from_scanoutpos(dev, crtc, max_error, + vblank_time, flags, + drmcrtc); +} /* * IOCTL. diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h index e301c6f9e059..55856ad0ac41 100644 --- a/drivers/gpu/drm/radeon/radeon_mode.h +++ b/drivers/gpu/drm/radeon/radeon_mode.h @@ -442,10 +442,6 @@ struct radeon_framebuffer { struct drm_gem_object *obj; }; -/* radeon_get_crtc_scanoutpos() return flags */ -#define RADEON_SCANOUTPOS_VALID (1 << 0) -#define RADEON_SCANOUTPOS_INVBL (1 << 1) -#define RADEON_SCANOUTPOS_ACCURATE (1 << 2) extern enum radeon_tv_std radeon_combios_get_tv_info(struct radeon_device *rdev); @@ -562,7 +558,8 @@ extern int radeon_crtc_cursor_set(struct drm_crtc *crtc, extern int radeon_crtc_cursor_move(struct drm_crtc *crtc, int x, int y); -extern int radeon_get_crtc_scanoutpos(struct radeon_device *rdev, int crtc, int *vpos, int *hpos); +extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc, + int *vpos, int *hpos); extern bool radeon_combios_check_hardcoded_edid(struct radeon_device *rdev); extern struct edid * diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 8c9b2ef32c68..5eda5e471980 100644 --- a/drivers/gpu/drm/radeon/radeon_pm.c +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -720,9 +720,9 @@ static bool radeon_pm_in_vbl(struct radeon_device *rdev) */ for (crtc = 0; (crtc < rdev->num_crtc) && in_vbl; crtc++) { if (rdev->pm.active_crtcs & (1 << crtc)) { - vbl_status = radeon_get_crtc_scanoutpos(rdev, crtc, &vpos, &hpos); - if ((vbl_status & RADEON_SCANOUTPOS_VALID) && - !(vbl_status & RADEON_SCANOUTPOS_INVBL)) + vbl_status = radeon_get_crtc_scanoutpos(rdev->ddev, crtc, &vpos, &hpos); + if ((vbl_status & DRM_SCANOUTPOS_VALID) && + !(vbl_status & DRM_SCANOUTPOS_INVBL)) in_vbl = false; } } -- 2.20.1