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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 4978cc93d9
Author: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
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
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Reported-and-tested-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ander Conselvan de Oliveira 2015-05-15 13:34:29 +03:00 committed by Daniel Vetter
parent acbb479390
commit dd3cd74acf
3 changed files with 18 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/i915/intel_ddi.c
View File

@ -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;

8
drivers/gpu/drm/i915/intel_display.c
View File

@ -7464,6 +7464,9 @@ 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;
@ -8505,6 +8508,9 @@ 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)),
@ -12261,8 +12267,6 @@ 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));
}
}

3
drivers/gpu/drm/i915/intel_dp.c
View File

@ -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;