From: Imre Deak imre.deak@intel.com
commit 3c6f13ad723e7206f03bb2752b01d18202b7fc9d upstream.
The TCSS_DDI_STATUS register is indexed by tc_port not by the FIA port index, fix this up. This only caused an issue on TC#3/4 ports in legacy mode, as in all other cases the two indices either match (on TC#1/2) or the TCSS_DDI_STATUS_READY flag is set regardless of something being connected or not (on TC#1/2/3/4 in dp-alt and tbt-alt modes).
Reported-and-tested-by: Chia-Lin Kao (AceLan) acelan.kao@canonical.com Fixes: 55ce306c2aa1 ("drm/i915/adl_p: Implement TC sequences") Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/4698 Cc: José Roberto de Souza jose.souza@intel.com Cc: stable@vger.kernel.org # v5.14+ Signed-off-by: Imre Deak imre.deak@intel.com Reviewed-by: José Roberto de Souza jose.souza@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20220126104356.2022975-1-imre.... (cherry picked from commit 516b33460c5bee78b2055637b0547bdb0e6af754) Signed-off-by: Tvrtko Ursulin tvrtko.ursulin@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/display/intel_tc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/display/intel_tc.c +++ b/drivers/gpu/drm/i915/display/intel_tc.c @@ -345,10 +345,11 @@ static bool icl_tc_phy_status_complete(s static bool adl_tc_phy_status_complete(struct intel_digital_port *dig_port) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + enum tc_port tc_port = intel_port_to_tc(i915, dig_port->base.port); struct intel_uncore *uncore = &i915->uncore; u32 val;
- val = intel_uncore_read(uncore, TCSS_DDI_STATUS(dig_port->tc_phy_fia_idx)); + val = intel_uncore_read(uncore, TCSS_DDI_STATUS(tc_port)); if (val == 0xffffffff) { drm_dbg_kms(&i915->drm, "Port %s: PHY in TCCOLD, assuming not complete\n",