[PATCH 0/2] drm/bridge: samsung-dsim: Small cleanups

[PATCH 0/2] drm/bridge: samsung-dsim: Small cleanups

[Philipp Zabel]

Replace an open-coded goto-again construct with a while loop and a
custom MHZ macro with the common HZ_PER_MHZ.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Philipp Zabel (2):
      drm/bridge: samsung-dsim: use while loop in samsung_dsim_transfer_start
      drm/bridge: samsung-dsim: Use HZ_PER_MHZ macro from units.h

 drivers/gpu/drm/bridge/samsung-dsim.c | 77 +++++++++++++++--------------------
 1 file changed, 33 insertions(+), 44 deletions(-)
---
base-commit: 99764593528f9e0ee9509f9e4a4eb21db99d0681
change-id: 20250527-samsung-dsim-2bae3b45f77b

Best regards,
-- 
Philipp Zabel <p.zabel@pengutronix.de>

[PATCH 1/2] drm/bridge: samsung-dsim: use while loop in samsung_dsim_transfer_start

[Philipp Zabel]

Turn the open-coded goto-again construct into a while loop, to make
samsung_dsim_transfer_start() a bit shorter and easier to read.

Hold the spinlock when looping back around and avoid the duplicated
list_empty() check.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 51 +++++++++++++++--------------------
 1 file changed, 21 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index 0014c497e3fe7d8349a119dbdda30d65d816cccf..1dfc9710bee5134e0e0114ce52f673c21564b11b 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -1235,43 +1235,34 @@ static void samsung_dsim_transfer_start(struct samsung_dsim *dsi)
 {
 	unsigned long flags;
 	struct samsung_dsim_transfer *xfer;
-	bool start = false;
 
-again:
 	spin_lock_irqsave(&dsi->transfer_lock, flags);
 
-	if (list_empty(&dsi->transfer_list)) {
+	while (!list_empty(&dsi->transfer_list)) {
+		xfer = list_first_entry(&dsi->transfer_list,
+					struct samsung_dsim_transfer, list);
+
 		spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-		return;
+
+		if (xfer->packet.payload_length &&
+		    xfer->tx_done == xfer->packet.payload_length)
+			/* waiting for RX */
+			return;
+
+		samsung_dsim_send_to_fifo(dsi, xfer);
+
+		if (xfer->packet.payload_length || xfer->rx_len)
+			return;
+
+		xfer->result = 0;
+		complete(&xfer->completed);
+
+		spin_lock_irqsave(&dsi->transfer_lock, flags);
+
+		list_del_init(&xfer->list);
 	}
 
-	xfer = list_first_entry(&dsi->transfer_list,
-				struct samsung_dsim_transfer, list);
-
 	spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-
-	if (xfer->packet.payload_length &&
-	    xfer->tx_done == xfer->packet.payload_length)
-		/* waiting for RX */
-		return;
-
-	samsung_dsim_send_to_fifo(dsi, xfer);
-
-	if (xfer->packet.payload_length || xfer->rx_len)
-		return;
-
-	xfer->result = 0;
-	complete(&xfer->completed);
-
-	spin_lock_irqsave(&dsi->transfer_lock, flags);
-
-	list_del_init(&xfer->list);
-	start = !list_empty(&dsi->transfer_list);
-
-	spin_unlock_irqrestore(&dsi->transfer_lock, flags);
-
-	if (start)
-		goto again;
 }
 
 static bool samsung_dsim_transfer_finish(struct samsung_dsim *dsi)

-- 
2.39.5

[PATCH 2/2] drm/bridge: samsung-dsim: Use HZ_PER_MHZ macro from units.h

[Philipp Zabel]

Drop the custom MHZ macro and replace it with HZ_PER_MHZ.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index 1dfc9710bee5134e0e0114ce52f673c21564b11b..b7fd5870eba7e4bef3f420ae7cf6de1a700eb41d 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -19,6 +19,7 @@
 #include <linux/of.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
+#include <linux/units.h>
 
 #include <video/mipi_display.h>
 
@@ -557,10 +558,6 @@ static void samsung_dsim_reset(struct samsung_dsim *dsi)
 	samsung_dsim_write(dsi, DSIM_SWRST_REG, reset_val);
 }
 
-#ifndef MHZ
-#define MHZ	(1000 * 1000)
-#endif
-
 static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
 					       unsigned long fin,
 					       unsigned long fout,
@@ -574,8 +571,8 @@ static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
 	u16 _m, best_m;
 	u8 _s, best_s;
 
-	p_min = DIV_ROUND_UP(fin, (driver_data->pll_fin_max * MHZ));
-	p_max = fin / (driver_data->pll_fin_min * MHZ);
+	p_min = DIV_ROUND_UP(fin, (driver_data->pll_fin_max * HZ_PER_MHZ));
+	p_max = fin / (driver_data->pll_fin_min * HZ_PER_MHZ);
 
 	for (_p = p_min; _p <= p_max; ++_p) {
 		for (_s = 0; _s <= 5; ++_s) {
@@ -590,8 +587,8 @@ static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
 
 			tmp = (u64)_m * fin;
 			do_div(tmp, _p);
-			if (tmp < driver_data->min_freq  * MHZ ||
-			    tmp > driver_data->max_freq * MHZ)
+			if (tmp < driver_data->min_freq  * HZ_PER_MHZ ||
+			    tmp > driver_data->max_freq * HZ_PER_MHZ)
 				continue;
 
 			tmp = (u64)_m * fin;
@@ -634,7 +631,7 @@ static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
 		 * limit.
 		 */
 		fin = clk_get_rate(clk_get_parent(dsi->pll_clk));
-		while (fin > driver_data->pll_fin_max * MHZ)
+		while (fin > driver_data->pll_fin_max * HZ_PER_MHZ)
 			fin /= 2;
 		clk_set_rate(dsi->pll_clk, fin);
 
@@ -660,10 +657,11 @@ static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
 
 	if (driver_data->has_freqband) {
 		static const unsigned long freq_bands[] = {
-			100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ,
-			270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ,
-			510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ,
-			770 * MHZ, 870 * MHZ, 950 * MHZ,
+			100 * HZ_PER_MHZ, 120 * HZ_PER_MHZ, 160 * HZ_PER_MHZ,
+			200 * HZ_PER_MHZ, 270 * HZ_PER_MHZ, 320 * HZ_PER_MHZ,
+			390 * HZ_PER_MHZ, 450 * HZ_PER_MHZ, 510 * HZ_PER_MHZ,
+			560 * HZ_PER_MHZ, 640 * HZ_PER_MHZ, 690 * HZ_PER_MHZ,
+			770 * HZ_PER_MHZ, 870 * HZ_PER_MHZ, 950 * HZ_PER_MHZ,
 		};
 		int band;
 
@@ -723,7 +721,7 @@ static int samsung_dsim_enable_clock(struct samsung_dsim *dsi)
 	esc_div = DIV_ROUND_UP(byte_clk, dsi->esc_clk_rate);
 	esc_clk = byte_clk / esc_div;
 
-	if (esc_clk > 20 * MHZ) {
+	if (esc_clk > 20 * HZ_PER_MHZ) {
 		++esc_div;
 		esc_clk = byte_clk / esc_div;
 	}

-- 
2.39.5

Re: [PATCH 1/2] drm/bridge: samsung-dsim: use while loop in samsung_dsim_transfer_start

[Frieder Schrempf]

Am 27.05.25 um 16:21 schrieb Philipp Zabel:
> Turn the open-coded goto-again construct into a while loop, to make
> samsung_dsim_transfer_start() a bit shorter and easier to read.
> 
> Hold the spinlock when looping back around and avoid the duplicated
> list_empty() check.
> 
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>

> ---
>  drivers/gpu/drm/bridge/samsung-dsim.c | 51 +++++++++++++++--------------------
>  1 file changed, 21 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
> index 0014c497e3fe7d8349a119dbdda30d65d816cccf..1dfc9710bee5134e0e0114ce52f673c21564b11b 100644
> --- a/drivers/gpu/drm/bridge/samsung-dsim.c
> +++ b/drivers/gpu/drm/bridge/samsung-dsim.c
> @@ -1235,43 +1235,34 @@ static void samsung_dsim_transfer_start(struct samsung_dsim *dsi)
>  {
>  	unsigned long flags;
>  	struct samsung_dsim_transfer *xfer;
> -	bool start = false;
>  
> -again:
>  	spin_lock_irqsave(&dsi->transfer_lock, flags);
>  
> -	if (list_empty(&dsi->transfer_list)) {
> +	while (!list_empty(&dsi->transfer_list)) {
> +		xfer = list_first_entry(&dsi->transfer_list,
> +					struct samsung_dsim_transfer, list);
> +
>  		spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -		return;
> +
> +		if (xfer->packet.payload_length &&
> +		    xfer->tx_done == xfer->packet.payload_length)
> +			/* waiting for RX */
> +			return;
> +
> +		samsung_dsim_send_to_fifo(dsi, xfer);
> +
> +		if (xfer->packet.payload_length || xfer->rx_len)
> +			return;
> +
> +		xfer->result = 0;
> +		complete(&xfer->completed);
> +
> +		spin_lock_irqsave(&dsi->transfer_lock, flags);
> +
> +		list_del_init(&xfer->list);
>  	}
>  
> -	xfer = list_first_entry(&dsi->transfer_list,
> -				struct samsung_dsim_transfer, list);
> -
>  	spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -
> -	if (xfer->packet.payload_length &&
> -	    xfer->tx_done == xfer->packet.payload_length)
> -		/* waiting for RX */
> -		return;
> -
> -	samsung_dsim_send_to_fifo(dsi, xfer);
> -
> -	if (xfer->packet.payload_length || xfer->rx_len)
> -		return;
> -
> -	xfer->result = 0;
> -	complete(&xfer->completed);
> -
> -	spin_lock_irqsave(&dsi->transfer_lock, flags);
> -
> -	list_del_init(&xfer->list);
> -	start = !list_empty(&dsi->transfer_list);
> -
> -	spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -
> -	if (start)
> -		goto again;
>  }
>  
>  static bool samsung_dsim_transfer_finish(struct samsung_dsim *dsi)
> 

Re: [PATCH 2/2] drm/bridge: samsung-dsim: Use HZ_PER_MHZ macro from units.h

[Frieder Schrempf]

Am 27.05.25 um 16:21 schrieb Philipp Zabel:
> Drop the custom MHZ macro and replace it with HZ_PER_MHZ.
> 
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>

> ---
>  drivers/gpu/drm/bridge/samsung-dsim.c | 26 ++++++++++++--------------
>  1 file changed, 12 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
> index 1dfc9710bee5134e0e0114ce52f673c21564b11b..b7fd5870eba7e4bef3f420ae7cf6de1a700eb41d 100644
> --- a/drivers/gpu/drm/bridge/samsung-dsim.c
> +++ b/drivers/gpu/drm/bridge/samsung-dsim.c
> @@ -19,6 +19,7 @@
>  #include <linux/of.h>
>  #include <linux/phy/phy.h>
>  #include <linux/platform_device.h>
> +#include <linux/units.h>
>  
>  #include <video/mipi_display.h>
>  
> @@ -557,10 +558,6 @@ static void samsung_dsim_reset(struct samsung_dsim *dsi)
>  	samsung_dsim_write(dsi, DSIM_SWRST_REG, reset_val);
>  }
>  
> -#ifndef MHZ
> -#define MHZ	(1000 * 1000)
> -#endif
> -
>  static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
>  					       unsigned long fin,
>  					       unsigned long fout,
> @@ -574,8 +571,8 @@ static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
>  	u16 _m, best_m;
>  	u8 _s, best_s;
>  
> -	p_min = DIV_ROUND_UP(fin, (driver_data->pll_fin_max * MHZ));
> -	p_max = fin / (driver_data->pll_fin_min * MHZ);
> +	p_min = DIV_ROUND_UP(fin, (driver_data->pll_fin_max * HZ_PER_MHZ));
> +	p_max = fin / (driver_data->pll_fin_min * HZ_PER_MHZ);
>  
>  	for (_p = p_min; _p <= p_max; ++_p) {
>  		for (_s = 0; _s <= 5; ++_s) {
> @@ -590,8 +587,8 @@ static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
>  
>  			tmp = (u64)_m * fin;
>  			do_div(tmp, _p);
> -			if (tmp < driver_data->min_freq  * MHZ ||
> -			    tmp > driver_data->max_freq * MHZ)
> +			if (tmp < driver_data->min_freq  * HZ_PER_MHZ ||
> +			    tmp > driver_data->max_freq * HZ_PER_MHZ)
>  				continue;
>  
>  			tmp = (u64)_m * fin;
> @@ -634,7 +631,7 @@ static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
>  		 * limit.
>  		 */
>  		fin = clk_get_rate(clk_get_parent(dsi->pll_clk));
> -		while (fin > driver_data->pll_fin_max * MHZ)
> +		while (fin > driver_data->pll_fin_max * HZ_PER_MHZ)
>  			fin /= 2;
>  		clk_set_rate(dsi->pll_clk, fin);
>  
> @@ -660,10 +657,11 @@ static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
>  
>  	if (driver_data->has_freqband) {
>  		static const unsigned long freq_bands[] = {
> -			100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ,
> -			270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ,
> -			510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ,
> -			770 * MHZ, 870 * MHZ, 950 * MHZ,
> +			100 * HZ_PER_MHZ, 120 * HZ_PER_MHZ, 160 * HZ_PER_MHZ,
> +			200 * HZ_PER_MHZ, 270 * HZ_PER_MHZ, 320 * HZ_PER_MHZ,
> +			390 * HZ_PER_MHZ, 450 * HZ_PER_MHZ, 510 * HZ_PER_MHZ,
> +			560 * HZ_PER_MHZ, 640 * HZ_PER_MHZ, 690 * HZ_PER_MHZ,
> +			770 * HZ_PER_MHZ, 870 * HZ_PER_MHZ, 950 * HZ_PER_MHZ,
>  		};
>  		int band;
>  
> @@ -723,7 +721,7 @@ static int samsung_dsim_enable_clock(struct samsung_dsim *dsi)
>  	esc_div = DIV_ROUND_UP(byte_clk, dsi->esc_clk_rate);
>  	esc_clk = byte_clk / esc_div;
>  
> -	if (esc_clk > 20 * MHZ) {
> +	if (esc_clk > 20 * HZ_PER_MHZ) {
>  		++esc_div;
>  		esc_clk = byte_clk / esc_div;
>  	}
> 

Re: [PATCH 1/2] drm/bridge: samsung-dsim: use while loop in samsung_dsim_transfer_start

[Alexander Stein]

Am Dienstag, 27. Mai 2025, 16:21:47 CEST schrieb Philipp Zabel:
> Turn the open-coded goto-again construct into a while loop, to make
> samsung_dsim_transfer_start() a bit shorter and easier to read.
> 
> Hold the spinlock when looping back around and avoid the duplicated
> list_empty() check.
> 
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>

> ---
>  drivers/gpu/drm/bridge/samsung-dsim.c | 51 +++++++++++++++--------------------
>  1 file changed, 21 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
> index 0014c497e3fe7d8349a119dbdda30d65d816cccf..1dfc9710bee5134e0e0114ce52f673c21564b11b 100644
> --- a/drivers/gpu/drm/bridge/samsung-dsim.c
> +++ b/drivers/gpu/drm/bridge/samsung-dsim.c
> @@ -1235,43 +1235,34 @@ static void samsung_dsim_transfer_start(struct samsung_dsim *dsi)
>  {
>  	unsigned long flags;
>  	struct samsung_dsim_transfer *xfer;
> -	bool start = false;
>  
> -again:
>  	spin_lock_irqsave(&dsi->transfer_lock, flags);
>  
> -	if (list_empty(&dsi->transfer_list)) {
> +	while (!list_empty(&dsi->transfer_list)) {
> +		xfer = list_first_entry(&dsi->transfer_list,
> +					struct samsung_dsim_transfer, list);
> +
>  		spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -		return;
> +
> +		if (xfer->packet.payload_length &&
> +		    xfer->tx_done == xfer->packet.payload_length)
> +			/* waiting for RX */
> +			return;
> +
> +		samsung_dsim_send_to_fifo(dsi, xfer);
> +
> +		if (xfer->packet.payload_length || xfer->rx_len)
> +			return;
> +
> +		xfer->result = 0;
> +		complete(&xfer->completed);
> +
> +		spin_lock_irqsave(&dsi->transfer_lock, flags);
> +
> +		list_del_init(&xfer->list);
>  	}
>  
> -	xfer = list_first_entry(&dsi->transfer_list,
> -				struct samsung_dsim_transfer, list);
> -
>  	spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -
> -	if (xfer->packet.payload_length &&
> -	    xfer->tx_done == xfer->packet.payload_length)
> -		/* waiting for RX */
> -		return;
> -
> -	samsung_dsim_send_to_fifo(dsi, xfer);
> -
> -	if (xfer->packet.payload_length || xfer->rx_len)
> -		return;
> -
> -	xfer->result = 0;
> -	complete(&xfer->completed);
> -
> -	spin_lock_irqsave(&dsi->transfer_lock, flags);
> -
> -	list_del_init(&xfer->list);
> -	start = !list_empty(&dsi->transfer_list);
> -
> -	spin_unlock_irqrestore(&dsi->transfer_lock, flags);
> -
> -	if (start)
> -		goto again;
>  }
>  
>  static bool samsung_dsim_transfer_finish(struct samsung_dsim *dsi)
> 
> 


-- 
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Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider
http://www.tq-group.com/

Re: [PATCH 2/2] drm/bridge: samsung-dsim: Use HZ_PER_MHZ macro from units.h

[Alexander Stein]

Am Dienstag, 27. Mai 2025, 16:21:48 CEST schrieb Philipp Zabel:
> Drop the custom MHZ macro and replace it with HZ_PER_MHZ.
> 
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>

> ---
>  drivers/gpu/drm/bridge/samsung-dsim.c | 26 ++++++++++++--------------
>  1 file changed, 12 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
> index 1dfc9710bee5134e0e0114ce52f673c21564b11b..b7fd5870eba7e4bef3f420ae7cf6de1a700eb41d 100644
> --- a/drivers/gpu/drm/bridge/samsung-dsim.c
> +++ b/drivers/gpu/drm/bridge/samsung-dsim.c
> @@ -19,6 +19,7 @@
>  #include <linux/of.h>
>  #include <linux/phy/phy.h>
>  #include <linux/platform_device.h>
> +#include <linux/units.h>
>  
>  #include <video/mipi_display.h>
>  
> @@ -557,10 +558,6 @@ static void samsung_dsim_reset(struct samsung_dsim *dsi)
>  	samsung_dsim_write(dsi, DSIM_SWRST_REG, reset_val);
>  }
>  
> -#ifndef MHZ
> -#define MHZ	(1000 * 1000)
> -#endif
> -
>  static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
>  					       unsigned long fin,
>  					       unsigned long fout,
> @@ -574,8 +571,8 @@ static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
>  	u16 _m, best_m;
>  	u8 _s, best_s;
>  
> -	p_min = DIV_ROUND_UP(fin, (driver_data->pll_fin_max * MHZ));
> -	p_max = fin / (driver_data->pll_fin_min * MHZ);
> +	p_min = DIV_ROUND_UP(fin, (driver_data->pll_fin_max * HZ_PER_MHZ));
> +	p_max = fin / (driver_data->pll_fin_min * HZ_PER_MHZ);
>  
>  	for (_p = p_min; _p <= p_max; ++_p) {
>  		for (_s = 0; _s <= 5; ++_s) {
> @@ -590,8 +587,8 @@ static unsigned long samsung_dsim_pll_find_pms(struct samsung_dsim *dsi,
>  
>  			tmp = (u64)_m * fin;
>  			do_div(tmp, _p);
> -			if (tmp < driver_data->min_freq  * MHZ ||
> -			    tmp > driver_data->max_freq * MHZ)
> +			if (tmp < driver_data->min_freq  * HZ_PER_MHZ ||
> +			    tmp > driver_data->max_freq * HZ_PER_MHZ)
>  				continue;
>  
>  			tmp = (u64)_m * fin;
> @@ -634,7 +631,7 @@ static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
>  		 * limit.
>  		 */
>  		fin = clk_get_rate(clk_get_parent(dsi->pll_clk));
> -		while (fin > driver_data->pll_fin_max * MHZ)
> +		while (fin > driver_data->pll_fin_max * HZ_PER_MHZ)
>  			fin /= 2;
>  		clk_set_rate(dsi->pll_clk, fin);
>  
> @@ -660,10 +657,11 @@ static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
>  
>  	if (driver_data->has_freqband) {
>  		static const unsigned long freq_bands[] = {
> -			100 * MHZ, 120 * MHZ, 160 * MHZ, 200 * MHZ,
> -			270 * MHZ, 320 * MHZ, 390 * MHZ, 450 * MHZ,
> -			510 * MHZ, 560 * MHZ, 640 * MHZ, 690 * MHZ,
> -			770 * MHZ, 870 * MHZ, 950 * MHZ,
> +			100 * HZ_PER_MHZ, 120 * HZ_PER_MHZ, 160 * HZ_PER_MHZ,
> +			200 * HZ_PER_MHZ, 270 * HZ_PER_MHZ, 320 * HZ_PER_MHZ,
> +			390 * HZ_PER_MHZ, 450 * HZ_PER_MHZ, 510 * HZ_PER_MHZ,
> +			560 * HZ_PER_MHZ, 640 * HZ_PER_MHZ, 690 * HZ_PER_MHZ,
> +			770 * HZ_PER_MHZ, 870 * HZ_PER_MHZ, 950 * HZ_PER_MHZ,
>  		};
>  		int band;
>  
> @@ -723,7 +721,7 @@ static int samsung_dsim_enable_clock(struct samsung_dsim *dsi)
>  	esc_div = DIV_ROUND_UP(byte_clk, dsi->esc_clk_rate);
>  	esc_clk = byte_clk / esc_div;
>  
> -	if (esc_clk > 20 * MHZ) {
> +	if (esc_clk > 20 * HZ_PER_MHZ) {
>  		++esc_div;
>  		esc_clk = byte_clk / esc_div;
>  	}
> 
> 


-- 
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Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider
http://www.tq-group.com/

Re: [PATCH 0/2] drm/bridge: samsung-dsim: Small cleanups

[Philipp Zabel]

On Di, 2025-05-27 at 16:21 +0200, Philipp Zabel wrote:
> Replace an open-coded goto-again construct with a while loop and a
> custom MHZ macro with the common HZ_PER_MHZ.
> 
> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
> ---
> Philipp Zabel (2):
>       drm/bridge: samsung-dsim: use while loop in samsung_dsim_transfer_start
>       drm/bridge: samsung-dsim: Use HZ_PER_MHZ macro from units.h
> 
>  drivers/gpu/drm/bridge/samsung-dsim.c | 77 +++++++++++++++--------------------
>  1 file changed, 33 insertions(+), 44 deletions(-)
> ---
> base-commit: 99764593528f9e0ee9509f9e4a4eb21db99d0681
> change-id: 20250527-samsung-dsim-2bae3b45f77b
> 
> Best regards,

Applied to drm-misc-next.

[1/2] drm/bridge: samsung-dsim: use while loop in samsung_dsim_transfer_start
      commit: bafc628678796e3a05bd54c30280f4ecdaf3ebba
[2/2] drm/bridge: samsung-dsim: Use HZ_PER_MHZ macro from units.h
      commit: b462b0ef4d788d56f0e575406e58450358dcbd96

regards
Philipp