6.6-stable review patch. If anyone has any objections, please let me know.
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From: Imre Deak imre.deak@intel.com
commit 879f70382ff3e92fc854589ada3453e3f5f5b601 upstream.
The format of the port width field in the DDI_BUF_CTL and the TRANS_DDI_FUNC_CTL registers are different starting with MTL, where the x3 lane mode for HDMI FRL has a different encoding in the two registers. To account for this use the TRANS_DDI_FUNC_CTL's own port width macro.
Cc: stable@vger.kernel.org # v6.5+ Fixes: b66a8abaa48a ("drm/i915/display/mtl: Fill port width in DDI_BUF_/TRANS_DDI_FUNC_/PORT_BUF_CTL for HDMI") Reviewed-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Imre Deak imre.deak@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20250214142001.552916-2-imre.d... (cherry picked from commit 76120b3a304aec28fef4910204b81a12db8974da) Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com [Imre: Rebased on v6.6.y, due to upstream API changes for intel_de_read(), TRANS_DDI_FUNC_CTL()] Signed-off-by: Imre Deak imre.deak@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/display/icl_dsi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/i915/display/icl_dsi.c +++ b/drivers/gpu/drm/i915/display/icl_dsi.c @@ -797,8 +797,8 @@ gen11_dsi_configure_transcoder(struct in
/* select data lane width */ tmp = intel_de_read(dev_priv, TRANS_DDI_FUNC_CTL(dsi_trans)); - tmp &= ~DDI_PORT_WIDTH_MASK; - tmp |= DDI_PORT_WIDTH(intel_dsi->lane_count); + tmp &= ~TRANS_DDI_PORT_WIDTH_MASK; + tmp |= TRANS_DDI_PORT_WIDTH(intel_dsi->lane_count);
/* select input pipe */ tmp &= ~TRANS_DDI_EDP_INPUT_MASK;