On 22.09.2023 12:56, Jani Nikula wrote:
Convert aux_ch_name() to a helper that prints a string to a caller
provided buffer, and use it to get more consistent aux channel
debugs. Now that all users of aux_ch_name() are in intel_dp_aux.c, we
can make it static too.
Signed-off-by: Jani Nikula <[email protected]>
---
drivers/gpu/drm/i915/display/intel_display.h | 2 -
drivers/gpu/drm/i915/display/intel_dp_aux.c | 41 ++++++++++++--------
2 files changed, 25 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.h
b/drivers/gpu/drm/i915/display/intel_display.h
index 49ac8473b988..9f252d1f03a7 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -190,8 +190,6 @@ enum aux_ch {
AUX_CH_E_XELPD,
};
-#define aux_ch_name(a) ((a) + 'A')
-
enum phy {
PHY_NONE = -1,
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c
index b90cad7f567b..4431b6290c4c 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c
@@ -14,6 +14,21 @@
#include "intel_pps.h"
#include "intel_tc.h"
+#define AUX_CH_NAME_BUFSIZE 6
+
+static const char *aux_ch_name(struct drm_i915_private *i915,
+ char *buf, int size, enum aux_ch aux_ch)
+{
+ if (DISPLAY_VER(i915) >= 13 && aux_ch >= AUX_CH_D_XELPD)
+ snprintf(buf, size, "%c", 'A' + aux_ch - AUX_CH_D_XELPD +
AUX_CH_D);
+ else if (DISPLAY_VER(i915) >= 12 && aux_ch >= AUX_CH_USBC1)
+ snprintf(buf, size, "USBC%c", '1' + aux_ch - AUX_CH_USBC1);
+ else
+ snprintf(buf, size, "%c", 'A' + aux_ch);
+
+ return buf;
+}
+
u32 intel_dp_aux_pack(const u8 *src, int src_bytes)
{
int i;
@@ -728,6 +743,7 @@ void intel_dp_aux_init(struct intel_dp *intel_dp)
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
struct intel_encoder *encoder = &dig_port->base;
enum aux_ch aux_ch = dig_port->aux_ch;
+ char buf[AUX_CH_NAME_BUFSIZE];
if (DISPLAY_VER(dev_priv) >= 14) {
intel_dp->aux_ch_ctl_reg = xelpdp_aux_ctl_reg;
@@ -764,18 +780,9 @@ void intel_dp_aux_init(struct intel_dp *intel_dp)
drm_dp_aux_init(&intel_dp->aux);
/* Failure to allocate our preferred name is not critical */
- if (DISPLAY_VER(dev_priv) >= 13 && aux_ch >= AUX_CH_D_XELPD)
- intel_dp->aux.name = kasprintf(GFP_KERNEL, "AUX %c/%s",
- aux_ch_name(aux_ch -
AUX_CH_D_XELPD + AUX_CH_D),
- encoder->base.name);
- else if (DISPLAY_VER(dev_priv) >= 12 && aux_ch >= AUX_CH_USBC1)
- intel_dp->aux.name = kasprintf(GFP_KERNEL, "AUX USBC%c/%s",
- aux_ch - AUX_CH_USBC1 + '1',
- encoder->base.name);
- else
- intel_dp->aux.name = kasprintf(GFP_KERNEL, "AUX %c/%s",
- aux_ch_name(aux_ch),
- encoder->base.name);
+ intel_dp->aux.name = kasprintf(GFP_KERNEL, "AUX %s/%s",
+ aux_ch_name(dev_priv, buf, sizeof(buf),
aux_ch),
+ encoder->base.name);
With define like:
#define aux_ch_name_smart(dev_priv, aux_ch) aux_ch_name(dev_priv,
(char[AUX_CH_NAME_BUFSIZE]){}, AUX_CH_NAME_BUFSIZE, aux_ch)
you could get rid of local variable buf, and two extra arguments in
call. The price is gcc macro magic and maybe less visible life-time
constraints, no strong suggestion :)
Reviewed-by: Andrzej Hajda <[email protected]>
Regards
Andrzej
intel_dp->aux.transfer = intel_dp_aux_transfer;
cpu_latency_qos_add_request(&intel_dp->pm_qos, PM_QOS_DEFAULT_VALUE);
@@ -819,6 +826,7 @@ enum aux_ch intel_dp_aux_ch(struct intel_encoder *encoder)
struct intel_encoder *other;
const char *source;
enum aux_ch aux_ch;
+ char buf[AUX_CH_NAME_BUFSIZE];
aux_ch = intel_bios_dp_aux_ch(encoder->devdata);
source = "VBT";
@@ -836,16 +844,17 @@ enum aux_ch intel_dp_aux_ch(struct intel_encoder *encoder)
other = get_encoder_by_aux_ch(encoder, aux_ch);
if (other) {
drm_dbg_kms(&i915->drm,
- "[ENCODER:%d:%s] AUX CH %c already claimed by
[ENCODER:%d:%s]\n",
- encoder->base.base.id, encoder->base.name,
aux_ch_name(aux_ch),
+ "[ENCODER:%d:%s] AUX CH %s already claimed by
[ENCODER:%d:%s]\n",
+ encoder->base.base.id, encoder->base.name,
+ aux_ch_name(i915, buf, sizeof(buf), aux_ch),
other->base.base.id, other->base.name);
return AUX_CH_NONE;
}
drm_dbg_kms(&i915->drm,
- "[ENCODER:%d:%s] Using AUX CH %c (%s)\n",
+ "[ENCODER:%d:%s] Using AUX CH %s (%s)\n",
encoder->base.base.id, encoder->base.name,
- aux_ch_name(aux_ch), source);
+ aux_ch_name(i915, buf, sizeof(buf), aux_ch), source);
return aux_ch;
}
