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drm/i915/dsi: debug log send packet sequence contents

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This might help debug issues better than just debug logging the function
name.

v2: Debug log type as hex (Ville)

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20251029084603.2254982-2-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jani Nikula
2025-10-29 10:46:03 +02:00
parent 23db1577ce
commit 427c69c7d4
1 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/i915/display/intel_dsi_vbt.c
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@@ -107,8 +107,7 @@ static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi,
u16 len;
enum port port;
ssize_t ret;
drm_dbg_kms(display->drm, "\n");
bool hs_mode;
flags = *data++;
type = *data++;
@@ -130,13 +129,18 @@ static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi,
goto out;
}
if ((flags >> MIPI_TRANSFER_MODE_SHIFT) & 1)
hs_mode = (flags >> MIPI_TRANSFER_MODE_SHIFT) & 1;
if (hs_mode)
dsi_device->mode_flags &= ~MIPI_DSI_MODE_LPM;
else
dsi_device->mode_flags |= MIPI_DSI_MODE_LPM;
dsi_device->channel = (flags >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 3;
drm_dbg_kms(display->drm, "DSI packet: Port %c (seq %u), Flags 0x%02x, VC %u, %s, Type 0x%02x, Length %u, Data %*ph\n",
port_name(port), seq_port, flags, dsi_device->channel,
hs_mode ? "HS" : "LP", type, len, (int)len, data);
switch (type) {
case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
ret = mipi_dsi_generic_write(dsi_device, NULL, 0);