media: allegro: use accessor functions for QP values

V4L2 specifies different controls for the QP values of different codecs.

Simplify users that just care for the QP values by providing accessor
function that return the correct control based on the currently set
codec.
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/allegro-dvt/allegro-core.c

@@ -264,6 +264,36 @@ struct allegro_channel {
 	unsigned int error;
 };
 
+static inline int
+allegro_channel_get_i_frame_qp(struct allegro_channel *channel)
+{
+	return v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_i_frame_qp);
+}
+
+static inline int
+allegro_channel_get_p_frame_qp(struct allegro_channel *channel)
+{
+	return v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_p_frame_qp);
+}
+
+static inline int
+allegro_channel_get_b_frame_qp(struct allegro_channel *channel)
+{
+	return v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_b_frame_qp);
+}
+
+static inline int
+allegro_channel_get_min_qp(struct allegro_channel *channel)
+{
+	return v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_min_qp);
+}
+
+static inline int
+allegro_channel_get_max_qp(struct allegro_channel *channel)
+{
+	return v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_max_qp);
+}
+
 struct allegro_m2m_buffer {
 	struct v4l2_m2m_buffer buf;
 	struct list_head head;
@@ -917,9 +947,9 @@ static s16 get_qp_delta(int minuend, int subtrahend)
 static int fill_create_channel_param(struct allegro_channel *channel,
 				     struct create_channel_param *param)
 {
-	int i_frame_qp = v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_i_frame_qp);
-	int p_frame_qp = v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_p_frame_qp);
-	int b_frame_qp = v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_b_frame_qp);
+	int i_frame_qp = allegro_channel_get_i_frame_qp(channel);
+	int p_frame_qp = allegro_channel_get_p_frame_qp(channel);
+	int b_frame_qp = allegro_channel_get_b_frame_qp(channel);
 	int bitrate_mode = v4l2_ctrl_g_ctrl(channel->mpeg_video_bitrate_mode);
 	unsigned int cpb_size = v4l2_ctrl_g_ctrl(channel->mpeg_video_cpb_size);
 	enum v4l2_mpeg_video_h264_profile profile;
@@ -982,8 +1012,8 @@ static int fill_create_channel_param(struct allegro_channel *channel,
 	param->target_bitrate = channel->bitrate;
 	param->max_bitrate = channel->bitrate_peak;
 	param->initial_qp = i_frame_qp;
-	param->min_qp = v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_min_qp);
-	param->max_qp = v4l2_ctrl_g_ctrl(channel->mpeg_video_h264_max_qp);
+	param->min_qp = allegro_channel_get_min_qp(channel);
+	param->max_qp = allegro_channel_get_max_qp(channel);
 	param->ip_delta = get_qp_delta(i_frame_qp, p_frame_qp);
 	param->pb_delta = get_qp_delta(p_frame_qp, b_frame_qp);
 	param->golden_ref = 0;