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authorHans de Goede <hdegoede@redhat.com>2014-12-19 15:47:37 +0100
committerHans de Goede <hdegoede@redhat.com>2015-01-14 14:56:38 +0100
commitb7ce12ddd7a7aba80fc8f10a50bfdec4f3aceb52 (patch)
treed026782302bbb7b03b37629fa80114a3ce5c8d77 /drivers/video/videomodes.c
parenteb3c0cf8069a004512aac23d85c87c2ee348f8cd (diff)
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videomodes: Add video_edid_dtd_to_ctfb_res_modes helper function
Add a video_edid_dtd_to_ctfb_res_modes helper function to convert an EDID detailed timing to a struct ctfb_res_modes. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Anatolij Gustschin <agust@denx.de>
Diffstat (limited to 'drivers/video/videomodes.c')
-rw-r--r--drivers/video/videomodes.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/video/videomodes.c b/drivers/video/videomodes.c
index 40c3315..cf71ad1 100644
--- a/drivers/video/videomodes.c
+++ b/drivers/video/videomodes.c
@@ -58,6 +58,8 @@
****************************************************************************/
#include <common.h>
+#include <edid.h>
+#include <errno.h>
#include <linux/ctype.h>
#include "videomodes.h"
@@ -373,3 +375,73 @@ int video_get_option_int(const char *options, const char *name, int def)
}
return def;
}
+
+/**
+ * Convert an EDID detailed timing to a struct ctfb_res_modes
+ *
+ * @param t The EDID detailed timing to be converted
+ * @param mode Returns the converted timing
+ *
+ * @return 0 on success, or a negative errno on error
+ */
+int video_edid_dtd_to_ctfb_res_modes(struct edid_detailed_timing *t,
+ struct ctfb_res_modes *mode)
+{
+ int margin, h_total, v_total;
+
+ /* Check all timings are non 0 */
+ if (EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) == 0 ||
+ EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*t) == 0 ||
+ EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t) == 0 ||
+ EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t) == 0 ||
+ EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) == 0 ||
+ EDID_DETAILED_TIMING_HSYNC_OFFSET(*t) == 0 ||
+ EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(*t) == 0 ||
+ EDID_DETAILED_TIMING_VSYNC_OFFSET(*t) == 0 ||
+ EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(*t) == 0 ||
+ /* 3d formats are not supported*/
+ EDID_DETAILED_TIMING_FLAG_STEREO(*t) != 0)
+ return -EINVAL;
+
+ mode->xres = EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(*t);
+ mode->yres = EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t);
+
+ h_total = mode->xres + EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t);
+ v_total = mode->yres + EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t);
+ mode->refresh = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) /
+ (h_total * v_total);
+
+ mode->pixclock_khz = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) / 1000;
+ mode->pixclock = 1000000000L / mode->pixclock_khz;
+
+ mode->right_margin = EDID_DETAILED_TIMING_HSYNC_OFFSET(*t);
+ mode->hsync_len = EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(*t);
+ margin = EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(*t) -
+ (mode->right_margin + mode->hsync_len);
+ if (margin <= 0)
+ return -EINVAL;
+
+ mode->left_margin = margin;
+
+ mode->lower_margin = EDID_DETAILED_TIMING_VSYNC_OFFSET(*t);
+ mode->vsync_len = EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(*t);
+ margin = EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) -
+ (mode->lower_margin + mode->vsync_len);
+ if (margin <= 0)
+ return -EINVAL;
+
+ mode->upper_margin = margin;
+
+ mode->sync = 0;
+ if (EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(*t))
+ mode->sync |= FB_SYNC_HOR_HIGH_ACT;
+ if (EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(*t))
+ mode->sync |= FB_SYNC_VERT_HIGH_ACT;
+
+ if (EDID_DETAILED_TIMING_FLAG_INTERLACED(*t))
+ mode->vmode = FB_VMODE_INTERLACED;
+ else
+ mode->vmode = FB_VMODE_NONINTERLACED;
+
+ return 0;
+}