From: Dhinakaran Pandiyan Date: Wed, 17 Jul 2019 22:34:51 +0000 (-0700) Subject: drm/i915/vbt: Fix VBT parsing for the PSR section X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=b5ea9c9337007d6e700280c8a60b4e10d070fb53;p=openwrt%2Fstaging%2Fblogic.git drm/i915/vbt: Fix VBT parsing for the PSR section 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 Cc: José Roberto de Souza 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 Reviewed-by: Ville Syrjälä Reviewed-by: José Roberto de Souza Acked-by: Rodrigo Vivi Tested-by: François Guerraz Signed-off-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20190717223451.2595-1-dhinakaran.pandiyan@intel.com --- diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index 21501d565327..b416b394b641 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -766,7 +766,7 @@ 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/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h index 93f5c9d204d6..09cd37fb0b1c 100644 --- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h +++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h @@ -481,13 +481,13 @@ 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; /*