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| author | Hermes Wu <hermes.wu@ite.com.tw> | 2024-12-30 18:51:23 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-17 10:04:48 +0100 |
| commit | 5d88251a8b5e2e76fdadaaf16299032bdb831b0a (patch) | |
| tree | bfc9fc70533f5637606c8c7caf74e272400f6356 /drivers/gpu | |
| parent | 3a047075b47ca874d926bf497487bd73ecc6409e (diff) | |
| download | linux-5d88251a8b5e2e76fdadaaf16299032bdb831b0a.tar.gz linux-5d88251a8b5e2e76fdadaaf16299032bdb831b0a.tar.bz2 linux-5d88251a8b5e2e76fdadaaf16299032bdb831b0a.zip | |
drm/bridge: it6505: fix HDCP Bstatus check
[ Upstream commit 0fd2ff47d8c207fa3173661de04bb9e8201c0ad2 ]
When HDCP is activated,
a DisplayPort source receiving CP_IRQ from the sink
shall check Bstatus from DPCD and process the corresponding value
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Hermes Wu <hermes.wu@ite.com.tw>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241230-v7-upstream-v7-5-e0fdd4844703@ite.corp-partner.google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/bridge/ite-it6505.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c index d55d7dad9545..0f7d50da5683 100644 --- a/drivers/gpu/drm/bridge/ite-it6505.c +++ b/drivers/gpu/drm/bridge/ite-it6505.c @@ -2312,14 +2312,20 @@ static int it6505_process_hpd_irq(struct it6505 *it6505) DRM_DEV_DEBUG_DRIVER(dev, "dp_irq_vector = 0x%02x", dp_irq_vector); if (dp_irq_vector & DP_CP_IRQ) { - it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ, - HDCP_TRIGGER_CPIRQ); - bstatus = it6505_dpcd_read(it6505, DP_AUX_HDCP_BSTATUS); if (bstatus < 0) return bstatus; DRM_DEV_DEBUG_DRIVER(dev, "Bstatus = 0x%02x", bstatus); + + /*Check BSTATUS when recive CP_IRQ */ + if (bstatus & DP_BSTATUS_R0_PRIME_READY && + it6505->hdcp_status == HDCP_AUTH_GOING) + it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ, + HDCP_TRIGGER_CPIRQ); + else if (bstatus & (DP_BSTATUS_REAUTH_REQ | DP_BSTATUS_LINK_FAILURE) && + it6505->hdcp_status == HDCP_AUTH_DONE) + it6505_start_hdcp(it6505); } ret = drm_dp_dpcd_read_link_status(&it6505->aux, link_status); |