From 9414f563f3857018d87e480b7cd13636b0c00ce6 Mon Sep 17 00:00:00 2001 From: Damien Lespiau Date: Tue, 4 Nov 2014 17:06:58 +0000 Subject: [PATCH] drm/i915/skl: Rework when the transition WMs are computed MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The transition WMs code was doing a shortcut and the values were copied from the WM0 ones at compute_wm_results() time. Going forward, we want to compute them like the other WMs and resolve their final register values in the same way as well. This patch does just that and isolate the transtion WM compute code in skl_compute_transition_wm() while skl_compute_wm_results() takes care of the register values. We also take the opportunity to disable the transition WMs for now. We've noticed underruns and they seem to be the culprit. Reviewed-by: Ville Syrjälä Signed-off-by: Damien Lespiau Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_pm.c | 46 ++++++++++++++++++++++----------- 1 file changed, 31 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 66f142bcbee4..41cfb2624cdc 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3374,14 +3374,18 @@ skl_compute_linetime_wm(struct drm_crtc *crtc, struct skl_pipe_wm_parameters *p) static void skl_compute_transition_wm(struct drm_crtc *crtc, struct skl_pipe_wm_parameters *params, - struct skl_pipe_wm *pipe_wm) + struct skl_wm_level *trans_wm /* out */) { - /* - * For now it is suggested to use the LP0 wm val of corresponding - * plane as transition wm val. - */ + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + int i; + if (!params->active) return; + + /* Until we know more, just disable transition WMs */ + for (i = 0; i < intel_num_planes(intel_crtc); i++) + trans_wm->plane_en[i] = false; + trans_wm->cursor_en = false; } static void skl_compute_pipe_wm(struct drm_crtc *crtc, @@ -3401,7 +3405,7 @@ static void skl_compute_pipe_wm(struct drm_crtc *crtc, } pipe_wm->linetime = skl_compute_linetime_wm(crtc, params); - skl_compute_transition_wm(crtc, params, pipe_wm); + skl_compute_transition_wm(crtc, params, &pipe_wm->trans_wm); } static void skl_compute_wm_results(struct drm_device *dev, @@ -3412,11 +3416,10 @@ static void skl_compute_wm_results(struct drm_device *dev, { int level, max_level = ilk_wm_max_level(dev); enum pipe pipe = intel_crtc->pipe; + uint32_t temp; + int i; for (level = 0; level <= max_level; level++) { - uint32_t temp; - int i; - for (i = 0; i < intel_num_planes(intel_crtc); i++) { temp = 0; @@ -3427,9 +3430,6 @@ static void skl_compute_wm_results(struct drm_device *dev, temp |= PLANE_WM_EN; r->plane[pipe][i][level] = temp; - /* Use the LP0 WM value for transition WM for now. */ - if (level == 0) - r->plane_trans[pipe][i] = temp; } temp = 0; @@ -3441,12 +3441,28 @@ static void skl_compute_wm_results(struct drm_device *dev, temp |= PLANE_WM_EN; r->cursor[pipe][level] = temp; - /* Use the LP0 WM value for transition WM for now. */ - if (level == 0) - r->cursor_trans[pipe] = temp; } + /* transition WMs */ + for (i = 0; i < intel_num_planes(intel_crtc); i++) { + temp = 0; + temp |= p_wm->trans_wm.plane_res_l[i] << PLANE_WM_LINES_SHIFT; + temp |= p_wm->trans_wm.plane_res_b[i]; + if (p_wm->trans_wm.plane_en[i]) + temp |= PLANE_WM_EN; + + r->plane_trans[pipe][i] = temp; + } + + temp = 0; + temp |= p_wm->trans_wm.cursor_res_l << PLANE_WM_LINES_SHIFT; + temp |= p_wm->trans_wm.cursor_res_b; + if (p_wm->trans_wm.cursor_en) + temp |= PLANE_WM_EN; + + r->cursor_trans[pipe] = temp; + r->wm_linetime[pipe] = p_wm->linetime; } -- 2.20.1