xf86-video-intel: src/sna/sna_display.c

[Chris Wilson]

 src/sna/sna_display.c |   37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

New commits:
commit 59fa53707eed18e5cc151bd2ce05a2dcdd325630
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Thu Jul 4 08:51:58 2013 +0100

    sna: Set the initial gamma from the attached monitor configuration
    
    Fixes a missed configuration option from
    commit 8a6a21bff86100144ba7960fc32a299ac54ada83 [2.21.11]
    Author: Chris Wilson <chris at chris-wilson.co.uk>
    Date:   Wed Jun 26 13:29:48 2013 +0100
    
        sna: Use the existing configuration for initial modes
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index d007472..a664e22 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -2945,6 +2945,41 @@ enum { /* XXX copied from hw/xfree86/modes/xf86Crtc.c */
 	OPTION_DEFAULT_MODES,
 };
 
+static void set_gamma(uint16_t *curve, int size, double value)
+{
+	int i;
+
+	value = 1/value;
+	for (i = 0; i < size; i++)
+		curve[i] = 256*(size-1)*pow(i/(double)(size-1), value);
+}
+
+static void set_initial_gamma(xf86OutputPtr output, xf86CrtcPtr crtc)
+{
+	XF86ConfMonitorPtr mon = output->conf_monitor;
+
+	if (!mon)
+		return;
+
+	if (mon->mon_gamma_red >= GAMMA_MIN &&
+	    mon->mon_gamma_red <= GAMMA_MAX &&
+	    mon->mon_gamma_red != 1.0)
+		set_gamma(crtc->gamma_red, crtc->gamma_size,
+			  mon->mon_gamma_red);
+
+	if (mon->mon_gamma_green >= GAMMA_MIN &&
+	    mon->mon_gamma_green <= GAMMA_MAX &&
+	    mon->mon_gamma_green != 1.0)
+		set_gamma(crtc->gamma_green, crtc->gamma_size,
+			  mon->mon_gamma_green);
+
+	if (mon->mon_gamma_blue >= GAMMA_MIN &&
+	    mon->mon_gamma_blue <= GAMMA_MAX &&
+	    mon->mon_gamma_blue != 1.0)
+		set_gamma(crtc->gamma_blue, crtc->gamma_size,
+			  mon->mon_gamma_blue);
+}
+
 static bool sna_probe_initial_configuration(struct sna *sna)
 {
 	ScrnInfoPtr scrn = sna->scrn;
@@ -3094,6 +3129,8 @@ static bool sna_probe_initial_configuration(struct sna *sna)
 						output->mm_width = (crtc->desiredMode.HDisplay * 254) / (10*DEFAULT_DPI);
 					}
 
+					set_initial_gamma(output, crtc);
+
 					M = calloc(1, sizeof(DisplayModeRec));
 					if (M) {
 						*M = crtc->desiredMode;