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path: root/drivers/gpu/drm/i915/intel_cdclk.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_cdclk.c')
-rw-r--r--drivers/gpu/drm/i915/intel_cdclk.c318
1 files changed, 160 insertions, 158 deletions
diff --git a/drivers/gpu/drm/i915/intel_cdclk.c b/drivers/gpu/drm/i915/intel_cdclk.c
index 1241e5891b29..b2a6d62b71c0 100644
--- a/drivers/gpu/drm/i915/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/intel_cdclk.c
@@ -417,24 +417,21 @@ static void hsw_get_cdclk(struct drm_i915_private *dev_priv,
cdclk_state->cdclk = 540000;
}
-static int vlv_calc_cdclk(struct drm_i915_private *dev_priv,
- int max_pixclk)
+static int vlv_calc_cdclk(struct drm_i915_private *dev_priv, int min_cdclk)
{
int freq_320 = (dev_priv->hpll_freq << 1) % 320000 != 0 ?
333333 : 320000;
- int limit = IS_CHERRYVIEW(dev_priv) ? 95 : 90;
/*
* We seem to get an unstable or solid color picture at 200MHz.
* Not sure what's wrong. For now use 200MHz only when all pipes
* are off.
*/
- if (!IS_CHERRYVIEW(dev_priv) &&
- max_pixclk > freq_320*limit/100)
+ if (IS_VALLEYVIEW(dev_priv) && min_cdclk > freq_320)
return 400000;
- else if (max_pixclk > 266667*limit/100)
+ else if (min_cdclk > 266667)
return freq_320;
- else if (max_pixclk > 0)
+ else if (min_cdclk > 0)
return 266667;
else
return 200000;
@@ -506,7 +503,7 @@ static void vlv_set_cdclk(struct drm_i915_private *dev_priv,
else
cmd = 0;
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
val &= ~DSPFREQGUAR_MASK;
val |= (cmd << DSPFREQGUAR_SHIFT);
@@ -516,7 +513,7 @@ static void vlv_set_cdclk(struct drm_i915_private *dev_priv,
50)) {
DRM_ERROR("timed out waiting for CDclk change\n");
}
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
mutex_lock(&dev_priv->sb_lock);
@@ -593,7 +590,7 @@ static void chv_set_cdclk(struct drm_i915_private *dev_priv,
*/
cmd = DIV_ROUND_CLOSEST(dev_priv->hpll_freq << 1, cdclk) - 1;
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
val = vlv_punit_read(dev_priv, PUNIT_REG_DSPFREQ);
val &= ~DSPFREQGUAR_MASK_CHV;
val |= (cmd << DSPFREQGUAR_SHIFT_CHV);
@@ -603,7 +600,7 @@ static void chv_set_cdclk(struct drm_i915_private *dev_priv,
50)) {
DRM_ERROR("timed out waiting for CDclk change\n");
}
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
intel_update_cdclk(dev_priv);
@@ -612,13 +609,13 @@ static void chv_set_cdclk(struct drm_i915_private *dev_priv,
intel_display_power_put(dev_priv, POWER_DOMAIN_PIPE_A);
}
-static int bdw_calc_cdclk(int max_pixclk)
+static int bdw_calc_cdclk(int min_cdclk)
{
- if (max_pixclk > 540000)
+ if (min_cdclk > 540000)
return 675000;
- else if (max_pixclk > 450000)
+ else if (min_cdclk > 450000)
return 540000;
- else if (max_pixclk > 337500)
+ else if (min_cdclk > 337500)
return 450000;
else
return 337500;
@@ -659,10 +656,10 @@ static void bdw_set_cdclk(struct drm_i915_private *dev_priv,
"trying to change cdclk frequency with cdclk not enabled\n"))
return;
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_write(dev_priv,
BDW_PCODE_DISPLAY_FREQ_CHANGE_REQ, 0x0);
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("failed to inform pcode about cdclk change\n");
return;
@@ -672,8 +669,12 @@ static void bdw_set_cdclk(struct drm_i915_private *dev_priv,
val |= LCPLL_CD_SOURCE_FCLK;
I915_WRITE(LCPLL_CTL, val);
+ /*
+ * According to the spec, it should be enough to poll for this 1 us.
+ * However, extensive testing shows that this can take longer.
+ */
if (wait_for_us(I915_READ(LCPLL_CTL) &
- LCPLL_CD_SOURCE_FCLK_DONE, 1))
+ LCPLL_CD_SOURCE_FCLK_DONE, 100))
DRM_ERROR("Switching to FCLK failed\n");
val = I915_READ(LCPLL_CTL);
@@ -711,9 +712,9 @@ static void bdw_set_cdclk(struct drm_i915_private *dev_priv,
LCPLL_CD_SOURCE_FCLK_DONE) == 0, 1))
DRM_ERROR("Switching back to LCPLL failed\n");
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ, data);
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
I915_WRITE(CDCLK_FREQ, DIV_ROUND_CLOSEST(cdclk, 1000) - 1);
@@ -724,23 +725,23 @@ static void bdw_set_cdclk(struct drm_i915_private *dev_priv,
cdclk, dev_priv->cdclk.hw.cdclk);
}
-static int skl_calc_cdclk(int max_pixclk, int vco)
+static int skl_calc_cdclk(int min_cdclk, int vco)
{
if (vco == 8640000) {
- if (max_pixclk > 540000)
+ if (min_cdclk > 540000)
return 617143;
- else if (max_pixclk > 432000)
+ else if (min_cdclk > 432000)
return 540000;
- else if (max_pixclk > 308571)
+ else if (min_cdclk > 308571)
return 432000;
else
return 308571;
} else {
- if (max_pixclk > 540000)
+ if (min_cdclk > 540000)
return 675000;
- else if (max_pixclk > 450000)
+ else if (min_cdclk > 450000)
return 540000;
- else if (max_pixclk > 337500)
+ else if (min_cdclk > 337500)
return 450000;
else
return 337500;
@@ -927,12 +928,12 @@ static void skl_set_cdclk(struct drm_i915_private *dev_priv,
WARN_ON((cdclk == 24000) != (vco == 0));
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL,
SKL_CDCLK_PREPARE_FOR_CHANGE,
SKL_CDCLK_READY_FOR_CHANGE,
SKL_CDCLK_READY_FOR_CHANGE, 3);
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
ret);
@@ -974,9 +975,9 @@ static void skl_set_cdclk(struct drm_i915_private *dev_priv,
POSTING_READ(CDCLK_CTL);
/* inform PCU of the change */
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, pcu_ack);
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
intel_update_cdclk(dev_priv);
}
@@ -1075,31 +1076,25 @@ void skl_uninit_cdclk(struct drm_i915_private *dev_priv)
skl_set_cdclk(dev_priv, &cdclk_state);
}
-static int bxt_calc_cdclk(int max_pixclk)
+static int bxt_calc_cdclk(int min_cdclk)
{
- if (max_pixclk > 576000)
+ if (min_cdclk > 576000)
return 624000;
- else if (max_pixclk > 384000)
+ else if (min_cdclk > 384000)
return 576000;
- else if (max_pixclk > 288000)
+ else if (min_cdclk > 288000)
return 384000;
- else if (max_pixclk > 144000)
+ else if (min_cdclk > 144000)
return 288000;
else
return 144000;
}
-static int glk_calc_cdclk(int max_pixclk)
+static int glk_calc_cdclk(int min_cdclk)
{
- /*
- * FIXME: Avoid using a pixel clock that is more than 99% of the cdclk
- * as a temporary workaround. Use a higher cdclk instead. (Note that
- * intel_compute_max_dotclk() limits the max pixel clock to 99% of max
- * cdclk.)
- */
- if (max_pixclk > DIV_ROUND_UP(2 * 158400 * 99, 100))
+ if (min_cdclk > 158400)
return 316800;
- else if (max_pixclk > DIV_ROUND_UP(2 * 79200 * 99, 100))
+ else if (min_cdclk > 79200)
return 158400;
else
return 79200;
@@ -1273,10 +1268,10 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
}
/* Inform power controller of upcoming frequency change */
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
0x80000000);
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("PCode CDCLK freq change notify failed (err %d, freq %d)\n",
@@ -1305,10 +1300,10 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
val |= BXT_CDCLK_SSA_PRECHARGE_ENABLE;
I915_WRITE(CDCLK_CTL, val);
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
ret = sandybridge_pcode_write(dev_priv, HSW_PCODE_DE_WRITE_FREQ_REQ,
DIV_ROUND_UP(cdclk, 25000));
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("PCode CDCLK freq set failed, (err %d, freq %d)\n",
@@ -1420,11 +1415,11 @@ void bxt_uninit_cdclk(struct drm_i915_private *dev_priv)
bxt_set_cdclk(dev_priv, &cdclk_state);
}
-static int cnl_calc_cdclk(int max_pixclk)
+static int cnl_calc_cdclk(int min_cdclk)
{
- if (max_pixclk > 336000)
+ if (min_cdclk > 336000)
return 528000;
- else if (max_pixclk > 168000)
+ else if (min_cdclk > 168000)
return 336000;
else
return 168000;
@@ -1523,12 +1518,12 @@ static void cnl_set_cdclk(struct drm_i915_private *dev_priv,
u32 val, divider, pcu_ack;
int ret;
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
ret = skl_pcode_request(dev_priv, SKL_PCODE_CDCLK_CONTROL,
SKL_CDCLK_PREPARE_FOR_CHANGE,
SKL_CDCLK_READY_FOR_CHANGE,
SKL_CDCLK_READY_FOR_CHANGE, 3);
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
if (ret) {
DRM_ERROR("Failed to inform PCU about cdclk change (%d)\n",
ret);
@@ -1580,9 +1575,9 @@ static void cnl_set_cdclk(struct drm_i915_private *dev_priv,
I915_WRITE(CDCLK_CTL, val);
/* inform PCU of the change */
- mutex_lock(&dev_priv->rps.hw_lock);
+ mutex_lock(&dev_priv->pcu_lock);
sandybridge_pcode_write(dev_priv, SKL_PCODE_CDCLK_CONTROL, pcu_ack);
- mutex_unlock(&dev_priv->rps.hw_lock);
+ mutex_unlock(&dev_priv->pcu_lock);
intel_update_cdclk(dev_priv);
}
@@ -1732,104 +1727,119 @@ void intel_set_cdclk(struct drm_i915_private *dev_priv,
dev_priv->display.set_cdclk(dev_priv, cdclk_state);
}
-static int bdw_adjust_min_pipe_pixel_rate(struct intel_crtc_state *crtc_state,
- int pixel_rate)
+static int intel_pixel_rate_to_cdclk(struct drm_i915_private *dev_priv,
+ int pixel_rate)
+{
+ if (INTEL_GEN(dev_priv) >= 10)
+ /*
+ * FIXME: Switch to DIV_ROUND_UP(pixel_rate, 2)
+ * once DDI clock voltage requirements are
+ * handled correctly.
+ */
+ return pixel_rate;
+ else if (IS_GEMINILAKE(dev_priv))
+ /*
+ * FIXME: Avoid using a pixel clock that is more than 99% of the cdclk
+ * as a temporary workaround. Use a higher cdclk instead. (Note that
+ * intel_compute_max_dotclk() limits the max pixel clock to 99% of max
+ * cdclk.)
+ */
+ return DIV_ROUND_UP(pixel_rate * 100, 2 * 99);
+ else if (IS_GEN9(dev_priv) ||
+ IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
+ return pixel_rate;
+ else if (IS_CHERRYVIEW(dev_priv))
+ return DIV_ROUND_UP(pixel_rate * 100, 95);
+ else
+ return DIV_ROUND_UP(pixel_rate * 100, 90);
+}
+
+int intel_crtc_compute_min_cdclk(const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv =
to_i915(crtc_state->base.crtc->dev);
+ int min_cdclk;
+
+ if (!crtc_state->base.enable)
+ return 0;
+
+ min_cdclk = intel_pixel_rate_to_cdclk(dev_priv, crtc_state->pixel_rate);
/* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */
if (IS_BROADWELL(dev_priv) && crtc_state->ips_enabled)
- pixel_rate = DIV_ROUND_UP(pixel_rate * 100, 95);
+ min_cdclk = DIV_ROUND_UP(min_cdclk * 100, 95);
/* BSpec says "Do not use DisplayPort with CDCLK less than 432 MHz,
* audio enabled, port width x4, and link rate HBR2 (5.4 GHz), or else
* there may be audio corruption or screen corruption." This cdclk
- * restriction for GLK is 316.8 MHz and since GLK can output two
- * pixels per clock, the pixel rate becomes 2 * 316.8 MHz.
+ * restriction for GLK is 316.8 MHz.
*/
if (intel_crtc_has_dp_encoder(crtc_state) &&
crtc_state->has_audio &&
crtc_state->port_clock >= 540000 &&
crtc_state->lane_count == 4) {
- if (IS_CANNONLAKE(dev_priv))
- pixel_rate = max(316800, pixel_rate);
- else if (IS_GEMINILAKE(dev_priv))
- pixel_rate = max(2 * 316800, pixel_rate);
- else
- pixel_rate = max(432000, pixel_rate);
+ if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) {
+ /* Display WA #1145: glk,cnl */
+ min_cdclk = max(316800, min_cdclk);
+ } else if (IS_GEN9(dev_priv) || IS_BROADWELL(dev_priv)) {
+ /* Display WA #1144: skl,bxt */
+ min_cdclk = max(432000, min_cdclk);
+ }
}
/* According to BSpec, "The CD clock frequency must be at least twice
* the frequency of the Azalia BCLK." and BCLK is 96 MHz by default.
- * The check for GLK has to be adjusted as the platform can output
- * two pixels per clock.
*/
- if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9) {
- if (IS_GEMINILAKE(dev_priv))
- pixel_rate = max(2 * 2 * 96000, pixel_rate);
- else
- pixel_rate = max(2 * 96000, pixel_rate);
+ if (crtc_state->has_audio && INTEL_GEN(dev_priv) >= 9)
+ min_cdclk = max(2 * 96000, min_cdclk);
+
+ if (min_cdclk > dev_priv->max_cdclk_freq) {
+ DRM_DEBUG_KMS("required cdclk (%d kHz) exceeds max (%d kHz)\n",
+ min_cdclk, dev_priv->max_cdclk_freq);
+ return -EINVAL;
}
- return pixel_rate;
+ return min_cdclk;
}
-/* compute the max rate for new configuration */
-static int intel_max_pixel_rate(struct drm_atomic_state *state)
+static int intel_compute_min_cdclk(struct drm_atomic_state *state)
{
struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
struct drm_i915_private *dev_priv = to_i915(state->dev);
- struct drm_crtc *crtc;
- struct drm_crtc_state *cstate;
+ struct intel_crtc *crtc;
struct intel_crtc_state *crtc_state;
- unsigned int max_pixel_rate = 0, i;
+ int min_cdclk, i;
enum pipe pipe;
- memcpy(intel_state->min_pixclk, dev_priv->min_pixclk,
- sizeof(intel_state->min_pixclk));
-
- for_each_new_crtc_in_state(state, crtc, cstate, i) {
- int pixel_rate;
-
- crtc_state = to_intel_crtc_state(cstate);
- if (!crtc_state->base.enable) {
- intel_state->min_pixclk[i] = 0;
- continue;
- }
-
- pixel_rate = crtc_state->pixel_rate;
+ memcpy(intel_state->min_cdclk, dev_priv->min_cdclk,
+ sizeof(intel_state->min_cdclk));
- if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9)
- pixel_rate =
- bdw_adjust_min_pipe_pixel_rate(crtc_state,
- pixel_rate);
+ for_each_new_intel_crtc_in_state(intel_state, crtc, crtc_state, i) {
+ min_cdclk = intel_crtc_compute_min_cdclk(crtc_state);
+ if (min_cdclk < 0)
+ return min_cdclk;
- intel_state->min_pixclk[i] = pixel_rate;
+ intel_state->min_cdclk[i] = min_cdclk;
}
+ min_cdclk = 0;
for_each_pipe(dev_priv, pipe)
- max_pixel_rate = max(intel_state->min_pixclk[pipe],
- max_pixel_rate);
+ min_cdclk = max(intel_state->min_cdclk[pipe], min_cdclk);
- return max_pixel_rate;
+ return min_cdclk;
}
static int vlv_modeset_calc_cdclk(struct drm_atomic_state *state)
{
struct drm_i915_private *dev_priv = to_i915(state->dev);
- int max_pixclk = intel_max_pixel_rate(state);
- struct intel_atomic_state *intel_state =
- to_intel_atomic_state(state);
- int cdclk;
+ struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+ int min_cdclk, cdclk;
- cdclk = vlv_calc_cdclk(dev_priv, max_pixclk);
+ min_cdclk = intel_compute_min_cdclk(state);
+ if (min_cdclk < 0)
+ return min_cdclk;
- if (cdclk > dev_priv->max_cdclk_freq) {
- DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
- cdclk, dev_priv->max_cdclk_freq);
- return -EINVAL;
- }
+ cdclk = vlv_calc_cdclk(dev_priv, min_cdclk);
intel_state->cdclk.logical.cdclk = cdclk;
@@ -1847,22 +1857,18 @@ static int vlv_modeset_calc_cdclk(struct drm_atomic_state *state)
static int bdw_modeset_calc_cdclk(struct drm_atomic_state *state)
{
- struct drm_i915_private *dev_priv = to_i915(state->dev);
struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
- int max_pixclk = intel_max_pixel_rate(state);
- int cdclk;
+ int min_cdclk, cdclk;
+
+ min_cdclk = intel_compute_min_cdclk(state);
+ if (min_cdclk < 0)
+ return min_cdclk;
/*
* FIXME should also account for plane ratio
* once 64bpp pixel formats are supported.
*/
- cdclk = bdw_calc_cdclk(max_pixclk);
-
- if (cdclk > dev_priv->max_cdclk_freq) {
- DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
- cdclk, dev_priv->max_cdclk_freq);
- return -EINVAL;
- }
+ cdclk = bdw_calc_cdclk(min_cdclk);
intel_state->cdclk.logical.cdclk = cdclk;
@@ -1880,10 +1886,13 @@ static int bdw_modeset_calc_cdclk(struct drm_atomic_state *state)
static int skl_modeset_calc_cdclk(struct drm_atomic_state *state)
{
- struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
struct drm_i915_private *dev_priv = to_i915(state->dev);
- const int max_pixclk = intel_max_pixel_rate(state);
- int cdclk, vco;
+ struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+ int min_cdclk, cdclk, vco;
+
+ min_cdclk = intel_compute_min_cdclk(state);
+ if (min_cdclk < 0)
+ return min_cdclk;
vco = intel_state->cdclk.logical.vco;
if (!vco)
@@ -1893,13 +1902,7 @@ static int skl_modeset_calc_cdclk(struct drm_atomic_state *state)
* FIXME should also account for plane ratio
* once 64bpp pixel formats are supported.
*/
- cdclk = skl_calc_cdclk(max_pixclk, vco);
-
- if (cdclk > dev_priv->max_cdclk_freq) {
- DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
- cdclk, dev_priv->max_cdclk_freq);
- return -EINVAL;
- }
+ cdclk = skl_calc_cdclk(min_cdclk, vco);
intel_state->cdclk.logical.vco = vco;
intel_state->cdclk.logical.cdclk = cdclk;
@@ -1920,25 +1923,21 @@ static int skl_modeset_calc_cdclk(struct drm_atomic_state *state)
static int bxt_modeset_calc_cdclk(struct drm_atomic_state *state)
{
struct drm_i915_private *dev_priv = to_i915(state->dev);
- int max_pixclk = intel_max_pixel_rate(state);
- struct intel_atomic_state *intel_state =
- to_intel_atomic_state(state);
- int cdclk, vco;
+ struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+ int min_cdclk, cdclk, vco;
+
+ min_cdclk = intel_compute_min_cdclk(state);
+ if (min_cdclk < 0)
+ return min_cdclk;
if (IS_GEMINILAKE(dev_priv)) {
- cdclk = glk_calc_cdclk(max_pixclk);
+ cdclk = glk_calc_cdclk(min_cdclk);
vco = glk_de_pll_vco(dev_priv, cdclk);
} else {
- cdclk = bxt_calc_cdclk(max_pixclk);
+ cdclk = bxt_calc_cdclk(min_cdclk);
vco = bxt_de_pll_vco(dev_priv, cdclk);
}
- if (cdclk > dev_priv->max_cdclk_freq) {
- DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
- cdclk, dev_priv->max_cdclk_freq);
- return -EINVAL;
- }
-
intel_state->cdclk.logical.vco = vco;
intel_state->cdclk.logical.cdclk = cdclk;
@@ -1964,19 +1963,15 @@ static int bxt_modeset_calc_cdclk(struct drm_atomic_state *state)
static int cnl_modeset_calc_cdclk(struct drm_atomic_state *state)
{
struct drm_i915_private *dev_priv = to_i915(state->dev);
- struct intel_atomic_state *intel_state =
- to_intel_atomic_state(state);
- int max_pixclk = intel_max_pixel_rate(state);
- int cdclk, vco;
+ struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
+ int min_cdclk, cdclk, vco;
- cdclk = cnl_calc_cdclk(max_pixclk);
- vco = cnl_cdclk_pll_vco(dev_priv, cdclk);
+ min_cdclk = intel_compute_min_cdclk(state);
+ if (min_cdclk < 0)
+ return min_cdclk;
- if (cdclk > dev_priv->max_cdclk_freq) {
- DRM_DEBUG_KMS("requested cdclk (%d kHz) exceeds max (%d kHz)\n",
- cdclk, dev_priv->max_cdclk_freq);
- return -EINVAL;
- }
+ cdclk = cnl_calc_cdclk(min_cdclk);
+ vco = cnl_cdclk_pll_vco(dev_priv, cdclk);
intel_state->cdclk.logical.vco = vco;
intel_state->cdclk.logical.cdclk = cdclk;
@@ -1999,14 +1994,21 @@ static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv)
{
int max_cdclk_freq = dev_priv->max_cdclk_freq;
- if (IS_GEMINILAKE(dev_priv))
+ if (INTEL_GEN(dev_priv) >= 10)
+ /*
+ * FIXME: Allow '2 * max_cdclk_freq'
+ * once DDI clock voltage requirements are
+ * handled correctly.
+ */
+ return max_cdclk_freq;
+ else if (IS_GEMINILAKE(dev_priv))
/*
* FIXME: Limiting to 99% as a temporary workaround. See
- * glk_calc_cdclk() for details.
+ * intel_min_cdclk() for details.
*/
return 2 * max_cdclk_freq * 99 / 100;
- else if (INTEL_INFO(dev_priv)->gen >= 9 ||
- IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
+ else if (IS_GEN9(dev_priv) ||
+ IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv))
return max_cdclk_freq;
else if (IS_CHERRYVIEW(dev_priv))
return max_cdclk_freq*95/100;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 11:50:40 +0000