diff mbox series

[v5,1/2] drm/dp_helper: Define options for FRL training for HDMI2.1 PCON

Message ID 20210323112422.1211-2-ankit.k.nautiyal@intel.com (mailing list archive)
State New, archived
Headers show
Series HDMI2.1 PCON Misc Fixes | expand

Commit Message

Nautiyal, Ankit K March 23, 2021, 11:24 a.m. UTC 
Currently the FRL training mode (Concurrent, Sequential) and
training type (Normal, Extended) are not defined properly and
are passed as bool values in drm_helpers for pcon
configuration for FRL training.

This patch:
-Add register masks for Sequential and Normal FRL training options.
-Fixes the drm_helpers for FRL Training configuration to use the
 appropriate masks.
-Modifies the calls to the above drm_helpers in i915/intel_dp as per
 the above change.

v2: Re-used the register masks for these options, instead of enum. (Ville)

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/drm_dp_helper.c         | 24 ++++++++++++++----------
 drivers/gpu/drm/i915/display/intel_dp.c | 10 ++++------
 include/drm/drm_dp_helper.h             |  6 ++++--
 3 files changed, 22 insertions(+), 18 deletions(-)

Comments

Jani Nikula March 26, 2021, 9:47 a.m. UTC | #1 
On Tue, 23 Mar 2021, Ankit Nautiyal <ankit.k.nautiyal@intel.com> wrote:
> Currently the FRL training mode (Concurrent, Sequential) and
> training type (Normal, Extended) are not defined properly and
> are passed as bool values in drm_helpers for pcon
> configuration for FRL training.
>
> This patch:
> -Add register masks for Sequential and Normal FRL training options.
> -Fixes the drm_helpers for FRL Training configuration to use the
>  appropriate masks.
> -Modifies the calls to the above drm_helpers in i915/intel_dp as per
>  the above change.
>
> v2: Re-used the register masks for these options, instead of enum. (Ville)
>
> Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

Maarten, Maxime, Thomas -

Can I get an ack for merging this via drm-intel-next, please?

BR,
Jani.


> ---
>  drivers/gpu/drm/drm_dp_helper.c         | 24 ++++++++++++++----------
>  drivers/gpu/drm/i915/display/intel_dp.c | 10 ++++------
>  include/drm/drm_dp_helper.h             |  6 ++++--
>  3 files changed, 22 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
> index eedbb48815b7..cb2f53e56685 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -2635,14 +2635,16 @@ EXPORT_SYMBOL(drm_dp_pcon_is_frl_ready);
>   * drm_dp_pcon_frl_configure_1() - Set HDMI LINK Configuration-Step1
>   * @aux: DisplayPort AUX channel
>   * @max_frl_gbps: maximum frl bw to be configured between PCON and HDMI sink
> - * @concurrent_mode: true if concurrent mode or operation is required,
> - * false otherwise.
> + * @frl_mode: FRL Training mode, it can be either Concurrent or Sequential.
> + * In Concurrent Mode, the FRL link bring up can be done along with
> + * DP Link training. In Sequential mode, the FRL link bring up is done prior to
> + * the DP Link training.
>   *
>   * Returns 0 if success, else returns negative error code.
>   */
>  
>  int drm_dp_pcon_frl_configure_1(struct drm_dp_aux *aux, int max_frl_gbps,
> -				bool concurrent_mode)
> +				u8 frl_mode)
>  {
>  	int ret;
>  	u8 buf;
> @@ -2651,7 +2653,7 @@ int drm_dp_pcon_frl_configure_1(struct drm_dp_aux *aux, int max_frl_gbps,
>  	if (ret < 0)
>  		return ret;
>  
> -	if (concurrent_mode)
> +	if (frl_mode == DP_PCON_ENABLE_CONCURRENT_LINK)
>  		buf |= DP_PCON_ENABLE_CONCURRENT_LINK;
>  	else
>  		buf &= ~DP_PCON_ENABLE_CONCURRENT_LINK;
> @@ -2694,21 +2696,23 @@ EXPORT_SYMBOL(drm_dp_pcon_frl_configure_1);
>   * drm_dp_pcon_frl_configure_2() - Set HDMI Link configuration Step-2
>   * @aux: DisplayPort AUX channel
>   * @max_frl_mask : Max FRL BW to be tried by the PCON with HDMI Sink
> - * @extended_train_mode : true for Extended Mode, false for Normal Mode.
> - * In Normal mode, the PCON tries each frl bw from the max_frl_mask starting
> - * from min, and stops when link training is successful. In Extended mode, all
> - * frl bw selected in the mask are trained by the PCON.
> + * @frl_type : FRL training type, can be Extended, or Normal.
> + * In Normal FRL training, the PCON tries each frl bw from the max_frl_mask
> + * starting from min, and stops when link training is successful. In Extended
> + * FRL training, all frl bw selected in the mask are trained by the PCON.
>   *
>   * Returns 0 if success, else returns negative error code.
>   */
>  int drm_dp_pcon_frl_configure_2(struct drm_dp_aux *aux, int max_frl_mask,
> -				bool extended_train_mode)
> +				u8 frl_type)
>  {
>  	int ret;
>  	u8 buf = max_frl_mask;
>  
> -	if (extended_train_mode)
> +	if (frl_type == DP_PCON_FRL_LINK_TRAIN_EXTENDED)
>  		buf |= DP_PCON_FRL_LINK_TRAIN_EXTENDED;
> +	else
> +		buf &= ~DP_PCON_FRL_LINK_TRAIN_EXTENDED;
>  
>  	ret = drm_dp_dpcd_writeb(aux, DP_PCON_HDMI_LINK_CONFIG_2, buf);
>  	if (ret < 0)
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 1400c5b44c83..1f6f4d0c8e2d 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -2073,10 +2073,6 @@ static int intel_dp_hdmi_sink_max_frl(struct intel_dp *intel_dp)
>  
>  static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp)
>  {
> -#define PCON_EXTENDED_TRAIN_MODE (1 > 0)
> -#define PCON_CONCURRENT_MODE (1 > 0)
> -#define PCON_SEQUENTIAL_MODE !PCON_CONCURRENT_MODE
> -#define PCON_NORMAL_TRAIN_MODE !PCON_EXTENDED_TRAIN_MODE
>  #define TIMEOUT_FRL_READY_MS 500
>  #define TIMEOUT_HDMI_LINK_ACTIVE_MS 1000
>  
> @@ -2110,10 +2106,12 @@ static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp)
>  		return -ETIMEDOUT;
>  
>  	max_frl_bw_mask = intel_dp_pcon_set_frl_mask(max_frl_bw);
> -	ret = drm_dp_pcon_frl_configure_1(&intel_dp->aux, max_frl_bw, PCON_SEQUENTIAL_MODE);
> +	ret = drm_dp_pcon_frl_configure_1(&intel_dp->aux, max_frl_bw,
> +					  DP_PCON_ENABLE_SEQUENTIAL_LINK);
>  	if (ret < 0)
>  		return ret;
> -	ret = drm_dp_pcon_frl_configure_2(&intel_dp->aux, max_frl_bw_mask, PCON_NORMAL_TRAIN_MODE);
> +	ret = drm_dp_pcon_frl_configure_2(&intel_dp->aux, max_frl_bw_mask,
> +					  DP_PCON_FRL_LINK_TRAIN_NORMAL);
>  	if (ret < 0)
>  		return ret;
>  	ret = drm_dp_pcon_frl_enable(&intel_dp->aux);
> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
> index 632ad7faa006..85d728f4aad0 100644
> --- a/include/drm/drm_dp_helper.h
> +++ b/include/drm/drm_dp_helper.h
> @@ -1176,6 +1176,7 @@ struct drm_device;
>  # define DP_PCON_ENABLE_MAX_BW_48GBPS	       6
>  # define DP_PCON_ENABLE_SOURCE_CTL_MODE       (1 << 3)
>  # define DP_PCON_ENABLE_CONCURRENT_LINK       (1 << 4)
> +# define DP_PCON_ENABLE_SEQUENTIAL_LINK       (0 << 4)
>  # define DP_PCON_ENABLE_LINK_FRL_MODE         (1 << 5)
>  # define DP_PCON_ENABLE_HPD_READY	      (1 << 6)
>  # define DP_PCON_ENABLE_HDMI_LINK             (1 << 7)
> @@ -1190,6 +1191,7 @@ struct drm_device;
>  # define DP_PCON_FRL_BW_MASK_40GBPS           (1 << 4)
>  # define DP_PCON_FRL_BW_MASK_48GBPS           (1 << 5)
>  # define DP_PCON_FRL_LINK_TRAIN_EXTENDED      (1 << 6)
> +# define DP_PCON_FRL_LINK_TRAIN_NORMAL        (0 << 6)
>  
>  /* PCON HDMI LINK STATUS */
>  #define DP_PCON_HDMI_TX_LINK_STATUS           0x303B
> @@ -2154,9 +2156,9 @@ int drm_dp_get_pcon_max_frl_bw(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
>  int drm_dp_pcon_frl_prepare(struct drm_dp_aux *aux, bool enable_frl_ready_hpd);
>  bool drm_dp_pcon_is_frl_ready(struct drm_dp_aux *aux);
>  int drm_dp_pcon_frl_configure_1(struct drm_dp_aux *aux, int max_frl_gbps,
> -				bool concurrent_mode);
> +				u8 frl_mode);
>  int drm_dp_pcon_frl_configure_2(struct drm_dp_aux *aux, int max_frl_mask,
> -				bool extended_train_mode);
> +				u8 frl_type);
>  int drm_dp_pcon_reset_frl_config(struct drm_dp_aux *aux);
>  int drm_dp_pcon_frl_enable(struct drm_dp_aux *aux);
Maxime Ripard March 26, 2021, 2:59 p.m. UTC | #2 
Hi,

On Fri, Mar 26, 2021 at 11:47:58AM +0200, Jani Nikula wrote:
> On Tue, 23 Mar 2021, Ankit Nautiyal <ankit.k.nautiyal@intel.com> wrote:
> > Currently the FRL training mode (Concurrent, Sequential) and
> > training type (Normal, Extended) are not defined properly and
> > are passed as bool values in drm_helpers for pcon
> > configuration for FRL training.
> >
> > This patch:
> > -Add register masks for Sequential and Normal FRL training options.
> > -Fixes the drm_helpers for FRL Training configuration to use the
> >  appropriate masks.
> > -Modifies the calls to the above drm_helpers in i915/intel_dp as per
> >  the above change.
> >
> > v2: Re-used the register masks for these options, instead of enum. (Ville)
> >
> > Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
> > Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> 
> Maarten, Maxime, Thomas -
> 
> Can I get an ack for merging this via drm-intel-next, please?

I was hoping that someone with either i915 or DP knowledge would
comment, but the patch looks fine to me, you can go ahead I guess :)

Maxime
Jani Nikula March 31, 2021, 10:21 a.m. UTC | #3 
On Fri, 26 Mar 2021, Maxime Ripard <maxime@cerno.tech> wrote:
> Hi,
>
> On Fri, Mar 26, 2021 at 11:47:58AM +0200, Jani Nikula wrote:
>> On Tue, 23 Mar 2021, Ankit Nautiyal <ankit.k.nautiyal@intel.com> wrote:
>> > Currently the FRL training mode (Concurrent, Sequential) and
>> > training type (Normal, Extended) are not defined properly and
>> > are passed as bool values in drm_helpers for pcon
>> > configuration for FRL training.
>> >
>> > This patch:
>> > -Add register masks for Sequential and Normal FRL training options.
>> > -Fixes the drm_helpers for FRL Training configuration to use the
>> >  appropriate masks.
>> > -Modifies the calls to the above drm_helpers in i915/intel_dp as per
>> >  the above change.
>> >
>> > v2: Re-used the register masks for these options, instead of enum. (Ville)
>> >
>> > Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
>> > Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
>> 
>> Maarten, Maxime, Thomas -
>> 
>> Can I get an ack for merging this via drm-intel-next, please?
>
> I was hoping that someone with either i915 or DP knowledge would
> comment, but the patch looks fine to me, you can go ahead I guess :)

Thanks for the patch, review, and ack, pushed the lot to drm-intel-next.

BR,
Jani.
diff mbox series

Patch

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index eedbb48815b7..cb2f53e56685 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -2635,14 +2635,16 @@  EXPORT_SYMBOL(drm_dp_pcon_is_frl_ready);
  * drm_dp_pcon_frl_configure_1() - Set HDMI LINK Configuration-Step1
  * @aux: DisplayPort AUX channel
  * @max_frl_gbps: maximum frl bw to be configured between PCON and HDMI sink
- * @concurrent_mode: true if concurrent mode or operation is required,
- * false otherwise.
+ * @frl_mode: FRL Training mode, it can be either Concurrent or Sequential.
+ * In Concurrent Mode, the FRL link bring up can be done along with
+ * DP Link training. In Sequential mode, the FRL link bring up is done prior to
+ * the DP Link training.
  *
  * Returns 0 if success, else returns negative error code.
  */
 
 int drm_dp_pcon_frl_configure_1(struct drm_dp_aux *aux, int max_frl_gbps,
-				bool concurrent_mode)
+				u8 frl_mode)
 {
 	int ret;
 	u8 buf;
@@ -2651,7 +2653,7 @@  int drm_dp_pcon_frl_configure_1(struct drm_dp_aux *aux, int max_frl_gbps,
 	if (ret < 0)
 		return ret;
 
-	if (concurrent_mode)
+	if (frl_mode == DP_PCON_ENABLE_CONCURRENT_LINK)
 		buf |= DP_PCON_ENABLE_CONCURRENT_LINK;
 	else
 		buf &= ~DP_PCON_ENABLE_CONCURRENT_LINK;
@@ -2694,21 +2696,23 @@  EXPORT_SYMBOL(drm_dp_pcon_frl_configure_1);
  * drm_dp_pcon_frl_configure_2() - Set HDMI Link configuration Step-2
  * @aux: DisplayPort AUX channel
  * @max_frl_mask : Max FRL BW to be tried by the PCON with HDMI Sink
- * @extended_train_mode : true for Extended Mode, false for Normal Mode.
- * In Normal mode, the PCON tries each frl bw from the max_frl_mask starting
- * from min, and stops when link training is successful. In Extended mode, all
- * frl bw selected in the mask are trained by the PCON.
+ * @frl_type : FRL training type, can be Extended, or Normal.
+ * In Normal FRL training, the PCON tries each frl bw from the max_frl_mask
+ * starting from min, and stops when link training is successful. In Extended
+ * FRL training, all frl bw selected in the mask are trained by the PCON.
  *
  * Returns 0 if success, else returns negative error code.
  */
 int drm_dp_pcon_frl_configure_2(struct drm_dp_aux *aux, int max_frl_mask,
-				bool extended_train_mode)
+				u8 frl_type)
 {
 	int ret;
 	u8 buf = max_frl_mask;
 
-	if (extended_train_mode)
+	if (frl_type == DP_PCON_FRL_LINK_TRAIN_EXTENDED)
 		buf |= DP_PCON_FRL_LINK_TRAIN_EXTENDED;
+	else
+		buf &= ~DP_PCON_FRL_LINK_TRAIN_EXTENDED;
 
 	ret = drm_dp_dpcd_writeb(aux, DP_PCON_HDMI_LINK_CONFIG_2, buf);
 	if (ret < 0)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 1400c5b44c83..1f6f4d0c8e2d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2073,10 +2073,6 @@  static int intel_dp_hdmi_sink_max_frl(struct intel_dp *intel_dp)
 
 static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp)
 {
-#define PCON_EXTENDED_TRAIN_MODE (1 > 0)
-#define PCON_CONCURRENT_MODE (1 > 0)
-#define PCON_SEQUENTIAL_MODE !PCON_CONCURRENT_MODE
-#define PCON_NORMAL_TRAIN_MODE !PCON_EXTENDED_TRAIN_MODE
 #define TIMEOUT_FRL_READY_MS 500
 #define TIMEOUT_HDMI_LINK_ACTIVE_MS 1000
 
@@ -2110,10 +2106,12 @@  static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp)
 		return -ETIMEDOUT;
 
 	max_frl_bw_mask = intel_dp_pcon_set_frl_mask(max_frl_bw);
-	ret = drm_dp_pcon_frl_configure_1(&intel_dp->aux, max_frl_bw, PCON_SEQUENTIAL_MODE);
+	ret = drm_dp_pcon_frl_configure_1(&intel_dp->aux, max_frl_bw,
+					  DP_PCON_ENABLE_SEQUENTIAL_LINK);
 	if (ret < 0)
 		return ret;
-	ret = drm_dp_pcon_frl_configure_2(&intel_dp->aux, max_frl_bw_mask, PCON_NORMAL_TRAIN_MODE);
+	ret = drm_dp_pcon_frl_configure_2(&intel_dp->aux, max_frl_bw_mask,
+					  DP_PCON_FRL_LINK_TRAIN_NORMAL);
 	if (ret < 0)
 		return ret;
 	ret = drm_dp_pcon_frl_enable(&intel_dp->aux);
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 632ad7faa006..85d728f4aad0 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1176,6 +1176,7 @@  struct drm_device;
 # define DP_PCON_ENABLE_MAX_BW_48GBPS	       6
 # define DP_PCON_ENABLE_SOURCE_CTL_MODE       (1 << 3)
 # define DP_PCON_ENABLE_CONCURRENT_LINK       (1 << 4)
+# define DP_PCON_ENABLE_SEQUENTIAL_LINK       (0 << 4)
 # define DP_PCON_ENABLE_LINK_FRL_MODE         (1 << 5)
 # define DP_PCON_ENABLE_HPD_READY	      (1 << 6)
 # define DP_PCON_ENABLE_HDMI_LINK             (1 << 7)
@@ -1190,6 +1191,7 @@  struct drm_device;
 # define DP_PCON_FRL_BW_MASK_40GBPS           (1 << 4)
 # define DP_PCON_FRL_BW_MASK_48GBPS           (1 << 5)
 # define DP_PCON_FRL_LINK_TRAIN_EXTENDED      (1 << 6)
+# define DP_PCON_FRL_LINK_TRAIN_NORMAL        (0 << 6)
 
 /* PCON HDMI LINK STATUS */
 #define DP_PCON_HDMI_TX_LINK_STATUS           0x303B
@@ -2154,9 +2156,9 @@  int drm_dp_get_pcon_max_frl_bw(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
 int drm_dp_pcon_frl_prepare(struct drm_dp_aux *aux, bool enable_frl_ready_hpd);
 bool drm_dp_pcon_is_frl_ready(struct drm_dp_aux *aux);
 int drm_dp_pcon_frl_configure_1(struct drm_dp_aux *aux, int max_frl_gbps,
-				bool concurrent_mode);
+				u8 frl_mode);
 int drm_dp_pcon_frl_configure_2(struct drm_dp_aux *aux, int max_frl_mask,
-				bool extended_train_mode);
+				u8 frl_type);
 int drm_dp_pcon_reset_frl_config(struct drm_dp_aux *aux);
 int drm_dp_pcon_frl_enable(struct drm_dp_aux *aux);