From: Dhinakaran Pandiyan dhinakaran.pandiyan@intel.com
A single 32-bit PSR2 training pattern field follows the sixteen element array of PSR table entries in the VBT spec. But, we incorrectly define this PSR2 field for each of the PSR table entries. As a result, the PSR1 training pattern duration for any panel_type != 0 will be parsed incorrectly. Secondly, PSR2 training pattern durations for VBTs with bdb version >= 226 will also be wrong.
Cc: Rodrigo Vivi rodrigo.vivi@intel.com Cc: José Roberto de Souza jose.souza@intel.com Cc: stable@vger.kernel.org Cc: stable@vger.kernel.org #v5.2 Fixes: 88a0d9606aff ("drm/i915/vbt: Parse and use the new field with PSR2 TP2/3 wakeup time") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111088 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204183 Signed-off-by: Dhinakaran Pandiyan dhinakaran.pandiyan@intel.com Reviewed-by: Ville Syrjälä ville.syrjala@linux.intel.com Reviewed-by: José Roberto de Souza jose.souza@intel.com Acked-by: Rodrigo Vivi rodrigo.vivi@intel.com Tested-by: François Guerraz kubrick@fgv6.net Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20190717223451.2595-1-dhinakar... Signed-off-by: Jani Nikula jani.nikula@intel.com (cherry picked from commit 6d61f716a01ec0e134de38ae97e71d6fec5a6ff6) ---
Sending it for Dhinakaran, let me know if something is wrong.
drivers/gpu/drm/i915/intel_bios.c | 2 +- drivers/gpu/drm/i915/intel_vbt_defs.h | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index 1dc8d03ff127..ee6fa75d65a2 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -762,7 +762,7 @@ parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb) }
if (bdb->version >= 226) { - u32 wakeup_time = psr_table->psr2_tp2_tp3_wakeup_time; + u32 wakeup_time = psr->psr2_tp2_tp3_wakeup_time;
wakeup_time = (wakeup_time >> (2 * panel_type)) & 0x3; switch (wakeup_time) { diff --git a/drivers/gpu/drm/i915/intel_vbt_defs.h b/drivers/gpu/drm/i915/intel_vbt_defs.h index fdbbb9a53804..796c070bbe6f 100644 --- a/drivers/gpu/drm/i915/intel_vbt_defs.h +++ b/drivers/gpu/drm/i915/intel_vbt_defs.h @@ -772,13 +772,13 @@ struct psr_table { /* TP wake up time in multiple of 100 */ u16 tp1_wakeup_time; u16 tp2_tp3_wakeup_time; - - /* PSR2 TP2/TP3 wakeup time for 16 panels */ - u32 psr2_tp2_tp3_wakeup_time; } __packed;
struct bdb_psr { struct psr_table psr_table[16]; + + /* PSR2 TP2/TP3 wakeup time for 16 panels */ + u32 psr2_tp2_tp3_wakeup_time; } __packed;
/*