From 696824e11c88f534ddff3a1166874d86a1b6b175 Mon Sep 17 00:00:00 2001 From: Ander Conselvan de Oliveira Date: Fri, 15 May 2015 13:18:48 +0300 Subject: [PATCH] drm/i915: Don't overwrite (e)DP PLL selection on SKL In the following commit, the place where the contents of dpll_hw_state in crtc_state where zeroed was changed. Prior to that commit, it happened when the new state was allocated, but now that happens just before the call the .crtc_compute_clock() hook. The DP code for SKL, however, sets up the (private) PLL in the encoder compute config function that has already run by the time that memset() is reached, causing the previous value to be lost. This patch fixes the issue by moving the memset() down the call chain, so that it is only called if the values in dpll_hw_state are going to be updated. commit 4978cc93d9ac240b435ce60431aef24239b4c270 Author: Ander Conselvan de Oliveira Date: Tue Apr 21 17:13:21 2015 +0300 drm/i915: Preserve shared DPLL information in new pipe_config Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90462 --- drivers/gpu/drm/i915/intel_ddi.c | 9 +++++++++ drivers/gpu/drm/i915/intel_display.c | 8 ++++++-- drivers/gpu/drm/i915/intel_dp.c | 3 +++ 3 files changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index ec5d2ea..48d45b2 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1087,6 +1087,9 @@ hsw_ddi_pll_select(struct intel_crtc *intel_crtc, WRPLL_DIVIDER_REFERENCE(r2) | WRPLL_DIVIDER_FEEDBACK(n2) | WRPLL_DIVIDER_POST(p); + memset(&crtc_state->dpll_hw_state, 0, + sizeof(crtc_state->dpll_hw_state)); + crtc_state->dpll_hw_state.wrpll = val; pll = intel_get_shared_dpll(intel_crtc, crtc_state); @@ -1309,6 +1312,9 @@ skl_ddi_pll_select(struct intel_crtc *intel_crtc, } else /* eDP */ return true; + memset(&crtc_state->dpll_hw_state, 0, + sizeof(crtc_state->dpll_hw_state)); + crtc_state->dpll_hw_state.ctrl1 = ctrl1; crtc_state->dpll_hw_state.cfgcr1 = cfgcr1; crtc_state->dpll_hw_state.cfgcr2 = cfgcr2; @@ -1419,6 +1425,9 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc, } } + memset(&crtc_state->dpll_hw_state, 0, + sizeof(crtc_state->dpll_hw_state)); + crtc_state->dpll_hw_state.ebb0 = PORT_PLL_P1(clk_div.p1) | PORT_PLL_P2(clk_div.p2); crtc_state->dpll_hw_state.pll0 = clk_div.m2_int; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 8d40d7d..a7732b4 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7475,6 +7475,9 @@ static int i9xx_crtc_compute_clock(struct intel_crtc *crtc, struct drm_connector_state *connector_state; int i; + memset(&crtc_state->dpll_hw_state, 0, + sizeof(crtc_state->dpll_hw_state)); + for_each_connector_in_state(state, connector, connector_state, i) { if (connector_state->crtc != &crtc->base) continue; @@ -8516,6 +8519,9 @@ static int ironlake_crtc_compute_clock(struct intel_crtc *crtc, bool is_lvds = false; struct intel_shared_dpll *pll; + memset(&crtc_state->dpll_hw_state, 0, + sizeof(crtc_state->dpll_hw_state)); + is_lvds = intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS); WARN(!(HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)), @@ -12265,8 +12271,6 @@ static int __intel_set_mode_setup_plls(struct drm_atomic_state *state) if (needs_modeset(crtc_state)) { clear_pipes |= 1 << intel_crtc->pipe; intel_crtc_state->shared_dpll = DPLL_ID_PRIVATE; - memset(&intel_crtc_state->dpll_hw_state, 0, - sizeof(intel_crtc_state->dpll_hw_state)); } } diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 5bd73ad..6fd9c60 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1097,6 +1097,9 @@ skl_edp_set_pll_config(struct intel_crtc_state *pipe_config, int link_clock) { u32 ctrl1; + memset(&pipe_config->dpll_hw_state, 0, + sizeof(pipe_config->dpll_hw_state)); + pipe_config->ddi_pll_sel = SKL_DPLL0; pipe_config->dpll_hw_state.cfgcr1 = 0; pipe_config->dpll_hw_state.cfgcr2 = 0; -- 2.1.0