[media] docs-rst: add tabularcolumns to all tables

LaTeX doesn't handle too well auto-width on tables, and ReST
markup requires an special tag to give it the needed hints.

As we're using A4 paper, we have 17cm of useful spaces. As
most media tables have widths, let's use it to generate the
needed via the following perl script:

my ($line_size, $table_header, $has_cols) = (17.5, 0, 0);
my $out;
my $header = "";
my @widths = ();
sub round { $_[0] > 0 ? int($_[0] + .5) : -int(-$_[0] + .5) }
while (<>) {
	if (!$table_header) {
		$has_cols = 1 if (m/..\s+tabularcolumns::/);
		if (m/..\s+flat-table::/) {
			$table_header = 1;
			$header = $_;
			next;
		}
		$out .= $_;
		next;
	}
	$header .= $_;
	@widths = split(/ /, $1) if (m/:widths:\s+(.*)/);
	if (m/^\n$/) {
		if (!$has_cols && @widths) {
			my ($tot, $t, $i) = (0, 0, 0);
			foreach my $v(@widths) { $tot += $v; };
			$out .= ".. tabularcolumns:: |";
			for ($i = 0; $i < scalar @widths - 1; $i++) {
				my $v = $widths[$i];
				my $w = round(10 * ($v * $line_size) / $tot) / 10;
				$out .= sprintf "p{%.1fcm}|", $w;
				$t += $w;
			}
			my $w = $line_size - $t;
			$out .= sprintf "p{%.1fcm}|\n\n", $w;
		}
		$out .= $header;
		$table_header = 0;
		$has_cols = 0;
		$header = "";
		@widths = ();
	}
}
print $out;

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/Documentation/media/uapi/v4l/vidioc-g-tuner.rst b/Documentation/media/uapi/v4l/vidioc-g-tuner.rst
index d209736d6a53..762918a1e58a 100644
--- a/Documentation/media/uapi/v4l/vidioc-g-tuner.rst
+++ b/Documentation/media/uapi/v4l/vidioc-g-tuner.rst
@@ -255,6 +255,8 @@ To change the radio frequency the
 
 .. _v4l2-tuner-type:
 
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
 .. flat-table:: enum v4l2_tuner_type
     :header-rows:  0
     :stub-columns: 0
@@ -297,6 +299,8 @@ To change the radio frequency the
 
 .. _tuner-capability:
 
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
 .. flat-table:: Tuner and Modulator Capability Flags
     :header-rows:  0
     :stub-columns: 0
@@ -455,6 +459,8 @@ To change the radio frequency the
 
 .. _tuner-rxsubchans:
 
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
 .. flat-table:: Tuner Audio Reception Flags
     :header-rows:  0
     :stub-columns: 0
@@ -522,6 +528,8 @@ To change the radio frequency the
 
 .. _tuner-audmode:
 
+.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
+
 .. flat-table:: Tuner Audio Modes
     :header-rows:  0
     :stub-columns: 0