From: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
To: Rob Clark <robin.clark@oss.qualcomm.com>,
Dmitry Baryshkov <lumag@kernel.org>,
Abhinav Kumar <abhinav.kumar@linux.dev>,
Jessica Zhang <jesszhan0024@gmail.com>,
Sean Paul <sean@poorly.run>,
Marijn Suijten <marijn.suijten@somainline.org>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
Kuogee Hsieh <quic_khsieh@quicinc.com>,
Yongxing Mou <yongxing.mou@oss.qualcomm.com>
Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org,
freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org,
Jessica Zhang <jesszhan0024@gmail.com>
Subject: [PATCH v5 01/10] drm/msm/dp: fix HPD state status bit shift value
Date: Sat, 14 Mar 2026 03:09:05 +0200 [thread overview]
Message-ID: <20260314-hpd-refactor-v5-1-0c8450737d64@oss.qualcomm.com> (raw)
In-Reply-To: <20260314-hpd-refactor-v5-0-0c8450737d64@oss.qualcomm.com>
From: Jessica Zhang <jesszhan0024@gmail.com>
The HPD state status is the 3 most significant bits, not 4 bits of the
HPD_INT_STATUS register.
Fix the bit shift macro so that the correct bits are returned in
msm_dp_aux_is_link_connected().
Fixes: 19e52bcb27c2 ("drm/msm/dp: return correct connection status after suspend")
Signed-off-by: Jessica Zhang <jessica.zhang@oss.qualcomm.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
drivers/gpu/drm/msm/dp/dp_reg.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_reg.h b/drivers/gpu/drm/msm/dp/dp_reg.h
index 7c44d4e2cf13..3689642b7fc0 100644
--- a/drivers/gpu/drm/msm/dp/dp_reg.h
+++ b/drivers/gpu/drm/msm/dp/dp_reg.h
@@ -68,8 +68,8 @@
#define DP_DP_IRQ_HPD_INT_ACK (0x00000002)
#define DP_DP_HPD_REPLUG_INT_ACK (0x00000004)
#define DP_DP_HPD_UNPLUG_INT_ACK (0x00000008)
-#define DP_DP_HPD_STATE_STATUS_BITS_MASK (0x0000000F)
-#define DP_DP_HPD_STATE_STATUS_BITS_SHIFT (0x1C)
+#define DP_DP_HPD_STATE_STATUS_BITS_MASK (0x00000007)
+#define DP_DP_HPD_STATE_STATUS_BITS_SHIFT (0x1D)
#define REG_DP_DP_HPD_INT_MASK (0x0000000C)
#define DP_DP_HPD_PLUG_INT_MASK (0x00000001)
--
2.47.3
next prev parent reply other threads:[~2026-03-14 1:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-14 1:09 [PATCH v5 00/10] drm/msm/dp: Drop the HPD state machine Dmitry Baryshkov
2026-03-14 1:09 ` Dmitry Baryshkov [this message]
2026-03-16 2:12 ` Claude review: drm/msm/dp: fix HPD state status bit shift value Claude Code Review Bot
2026-03-14 1:09 ` [PATCH v5 02/10] drm/msm/dp: Fix the ISR_* enum values Dmitry Baryshkov
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
2026-03-14 1:09 ` [PATCH v5 03/10] drm/msm/dp: Read DPCD and sink count in bridge detect() Dmitry Baryshkov
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
2026-03-14 1:09 ` [PATCH v5 04/10] drm/msm/dp: Move link training to atomic_enable() Dmitry Baryshkov
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
2026-03-14 1:09 ` [PATCH v5 05/10] drm/msm/dp: Drop EV_USER_NOTIFICATION Dmitry Baryshkov
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
2026-03-14 1:09 ` [PATCH v5 06/10] drm/msm/dp: drop event data Dmitry Baryshkov
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
2026-03-14 1:09 ` [PATCH v5 07/10] drm/msm/dp: rework HPD handling Dmitry Baryshkov
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
2026-03-14 1:09 ` [PATCH v5 08/10] drm/msm/dp: Add sink_count to debug logs Dmitry Baryshkov
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
2026-03-14 1:09 ` [PATCH v5 09/10] drm/msm/dp: turn link_ready into plugged Dmitry Baryshkov
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
2026-03-14 1:09 ` [PATCH v5 10/10] drm/msm/dp: clear EDID on display unplug Dmitry Baryshkov
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
2026-03-15 0:51 ` [PATCH v5 00/10] drm/msm/dp: Drop the HPD state machine Val Packett
2026-03-15 1:10 ` Val Packett
2026-03-16 2:12 ` Claude review: " Claude Code Review Bot
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