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drm/i915/bxt: BUNs related to port PLL

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This patch contains changes based on 2 updates to the spec:
Port PLL VCO restriction raised up to 6700.
Port PLL now needs DCO amp override enable for all VCO frequencies.

v2: Sonika's review comment addressed
	- dcoampovr_en_h variable not required
Based on a discussion with Siva, the following changes have been made.
	- replace dco_amp var with #define BXT_DCO_AMPLITUDE
	- set pll10 in a single assignment

v3:
Move DCO amplitude default value to i915_reg.h. Suggested by Siva.

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
Reviewed-by: Sonika Jindal <sonika.jindal@intel.com> [v2]
[danvet: Spell out BUN since not everyone knows what this means.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Vandana Kannan 2015-07-01 17:02:57 +05:30 committed by Daniel Vetter
parent 7a0baa6234
commit e62925567c
3 changed files with 7 additions and 11 deletions
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1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -1215,6 +1215,7 @@ enum skl_disp_power_wells {
#define PORT_PLL_LOCK_THRESHOLD_MASK (0x7 << PORT_PLL_LOCK_THRESHOLD_SHIFT)
/* PORT_PLL_10_A */
#define PORT_PLL_DCO_AMP_OVR_EN_H (1<<27)
#define PORT_PLL_DCO_AMP_DEFAULT 15
#define PORT_PLL_DCO_AMP_MASK 0x3c00
#define PORT_PLL_DCO_AMP(x) (x<<10)
#define _PORT_PLL_BASE(port) _PORT3(port, _PORT_PLL_0_A, \

15
drivers/gpu/drm/i915/intel_ddi.c
View File

@ -1644,7 +1644,7 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc,
struct bxt_clk_div clk_div = {0};
int vco = 0;
uint32_t prop_coef, int_coef, gain_ctl, targ_cnt;
uint32_t dcoampovr_en_h, dco_amp, lanestagger;
uint32_t lanestagger;
if (intel_encoder->type == INTEL_OUTPUT_HDMI) {
intel_clock_t best_clock;
@ -1683,9 +1683,7 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc,
vco = clock * 10 / 2 * clk_div.p1 * clk_div.p2;
}
dco_amp = 15;
dcoampovr_en_h = 0;
if (vco >= 6200000 && vco <= 6480000) {
if (vco >= 6200000 && vco <= 6700000) {
prop_coef = 4;
int_coef = 9;
gain_ctl = 3;
@ -1696,8 +1694,6 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc,
int_coef = 11;
gain_ctl = 3;
targ_cnt = 9;
if (vco >= 4800000 && vco < 5400000)
dcoampovr_en_h = 1;
} else if (vco == 5400000) {
prop_coef = 3;
int_coef = 8;
@ -1741,10 +1737,9 @@ bxt_ddi_pll_select(struct intel_crtc *intel_crtc,
crtc_state->dpll_hw_state.pll9 = 5 << PORT_PLL_LOCK_THRESHOLD_SHIFT;
if (dcoampovr_en_h)
crtc_state->dpll_hw_state.pll10 = PORT_PLL_DCO_AMP_OVR_EN_H;
crtc_state->dpll_hw_state.pll10 |= PORT_PLL_DCO_AMP(dco_amp);
crtc_state->dpll_hw_state.pll10 =
PORT_PLL_DCO_AMP(PORT_PLL_DCO_AMP_DEFAULT)
| PORT_PLL_DCO_AMP_OVR_EN_H;
crtc_state->dpll_hw_state.ebb4 = PORT_PLL_10BIT_CLK_ENABLE;

2
drivers/gpu/drm/i915/intel_display.c
View File

@ -409,7 +409,7 @@ static const intel_limit_t intel_limits_chv = {
static const intel_limit_t intel_limits_bxt = {
/* FIXME: find real dot limits */
.dot = { .min = 0, .max = INT_MAX },
.vco = { .min = 4800000, .max = 6480000 },
.vco = { .min = 4800000, .max = 6700000 },
.n = { .min = 1, .max = 1 },
.m1 = { .min = 2, .max = 2 },
/* FIXME: find real m2 limits */