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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 <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: 88a0d9606a ("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-dhinakaran.pandiyan@intel.com
This commit is contained in:
Dhinakaran Pandiyan 2019-07-17 15:34:51 -07:00 committed by Rodrigo Vivi
parent bdae33b8b8
commit b5ea9c9337
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/display/intel_bios.c
View File

@ -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) {

6
drivers/gpu/drm/i915/display/intel_vbt_defs.h
View File

@ -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;
/*