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drm/i915/display: Add 480 MHz CDCLK steps for RPL-U

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A new step of 480MHz has been added on SKUs that have a RPL-U
device id to support 120Hz displays more efficiently. Use a
new quirk to identify the machine for which this change needs
to be applied.

v2: (Matt)
    - Add missing clock steps
    - Correct reference clock typo

v3: - Revert to RPL-U subplatform (Jani)

v4: - Remove Bspec reference from code (Jani)

Bspec: 55409
Signed-off-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230130100806.1373883-3-chaitanya.kumar.borah@intel.com
This commit is contained in:
Chaitanya Kumar Borah 2023-01-30 15:38:06 +05:30 • committed by Jani Nikula
parent 61b795a9c3
commit 06f1b06dc5
1 changed files with 26 additions and 0 deletions
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26
drivers/gpu/drm/i915/display/intel_cdclk.c
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@ -1329,6 +1329,30 @@ static const struct intel_cdclk_vals adlp_cdclk_table[] = {
{}
};
static const struct intel_cdclk_vals rplu_cdclk_table[] = {
{ .refclk = 19200, .cdclk = 172800, .divider = 3, .ratio = 27 },
{ .refclk = 19200, .cdclk = 192000, .divider = 2, .ratio = 20 },
{ .refclk = 19200, .cdclk = 307200, .divider = 2, .ratio = 32 },
{ .refclk = 19200, .cdclk = 480000, .divider = 2, .ratio = 50 },
{ .refclk = 19200, .cdclk = 556800, .divider = 2, .ratio = 58 },
{ .refclk = 19200, .cdclk = 652800, .divider = 2, .ratio = 68 },
{ .refclk = 24000, .cdclk = 176000, .divider = 3, .ratio = 22 },
{ .refclk = 24000, .cdclk = 192000, .divider = 2, .ratio = 16 },
{ .refclk = 24000, .cdclk = 312000, .divider = 2, .ratio = 26 },
{ .refclk = 24000, .cdclk = 480000, .divider = 2, .ratio = 40 },
{ .refclk = 24000, .cdclk = 552000, .divider = 2, .ratio = 46 },
{ .refclk = 24000, .cdclk = 648000, .divider = 2, .ratio = 54 },
{ .refclk = 38400, .cdclk = 179200, .divider = 3, .ratio = 14 },
{ .refclk = 38400, .cdclk = 192000, .divider = 2, .ratio = 10 },
{ .refclk = 38400, .cdclk = 307200, .divider = 2, .ratio = 16 },
{ .refclk = 38400, .cdclk = 480000, .divider = 2, .ratio = 25 },
{ .refclk = 38400, .cdclk = 556800, .divider = 2, .ratio = 29 },
{ .refclk = 38400, .cdclk = 652800, .divider = 2, .ratio = 34 },
{}
};
static const struct intel_cdclk_vals dg2_cdclk_table[] = {
{ .refclk = 38400, .cdclk = 163200, .divider = 2, .ratio = 34, .waveform = 0x8888 },
{ .refclk = 38400, .cdclk = 204000, .divider = 2, .ratio = 34, .waveform = 0x9248 },
@ -3364,6 +3388,8 @@ void intel_init_cdclk_hooks(struct drm_i915_private *dev_priv)
/* Wa_22011320316:adl-p[a0] */
if (IS_ADLP_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B0))
dev_priv->display.cdclk.table = adlp_a_step_cdclk_table;
else if (IS_ADLP_RPLU(dev_priv))
dev_priv->display.cdclk.table = rplu_cdclk_table;
else
dev_priv->display.cdclk.table = adlp_cdclk_table;
} else if (IS_ROCKETLAKE(dev_priv)) {