From: Mitul Golani <mitulkumar.ajitkumar.golani@xxxxxxxxx> commit 7fbad577c82c5dd6db7217855c26f51554e53d85 upstream. The dispcnlunit1_cp_xosc_clk should be de-asserted in display off and only asserted in display on. As part of this workaround, Display driver shall execute set-reset sequence at the end of the initialize sequence to ensure clk does not remain active in display OFF. --v2: - Rebase. --v3: - Correct HSD number in commit message. --v4: - Reformat commit message. - Use intel_de_rmw instead of intel_de_write --v5: - Build Fixes. WA: 15013987218 Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@xxxxxxxxx> Reviewed-by: Nemesa Garg <nemesa.garg@xxxxxxxxx> Reviewed-by: Suraj Kandpal <suraj.kandpal@xxxxxxxxx> Signed-off-by: Suraj Kandpal <suraj.kandpal@xxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20240708083247.2611258-1-mitulkumar.ajitkumar.golani@xxxxxxxxx Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_display_power.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index e288a1b21d7e6..0af1e34ef2a70 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -1704,6 +1704,14 @@ static void icl_display_core_init(struct drm_i915_private *dev_priv, /* Wa_14011503030:xelpd */ if (DISPLAY_VER(dev_priv) == 13) intel_de_write(dev_priv, XELPD_DISPLAY_ERR_FATAL_MASK, ~0); + + /* Wa_15013987218 */ + if (DISPLAY_VER(dev_priv) == 20) { + intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D, + 0, PCH_GMBUSUNIT_CLOCK_GATE_DISABLE); + intel_de_rmw(dev_priv, SOUTH_DSPCLK_GATE_D, + PCH_GMBUSUNIT_CLOCK_GATE_DISABLE, 0); + } } static void icl_display_core_uninit(struct drm_i915_private *dev_priv) -- 2.47.0
