Re: [PATCH 1/6] drivers: core: ofnode: Add panel timing decode.

Hi Nikhil,

On Mon, 23 Jan 2023 at 01:07, Nikhil M Jain n-jain1@ti.com wrote:

ofnode_decode_display_timing supports reading timing parameters from subnode of display-timings node, for displays supporting multiple resolution, in case if a display supports single resolution, it fails reading directly from display-timings node, to support it ofnode_decode_panel_timing is added.

Signed-off-by: Nikhil M Jain n-jain1@ti.com

drivers/core/ofnode.c | 53 +++++++++++++++++++++++++++++++++++++++++++ include/dm/ofnode.h | 12 ++++++++++ 2 files changed, 65 insertions(+)

diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c index 4d56b1a767..d06b947516 100644 --- a/drivers/core/ofnode.c +++ b/drivers/core/ofnode.c @@ -991,6 +991,59 @@ int ofnode_decode_display_timing(ofnode parent, int index, return ret; }

+int ofnode_decode_panel_timing(ofnode parent,

•                          struct display_timing *dt)
  

+{

•   ofnode timings;
  

•   u32 val = 0;
  

•   int ret = 0;
  

•   timings = ofnode_find_subnode(parent, "panel-timings");
  

•   if (!ofnode_valid(timings))
  

•           return -EINVAL;
  

•   memset(dt, 0, sizeof(*dt));
  

•   ret |= decode_timing_property(timings, "hback-porch", &dt->hback_porch);
  

•   ret |= decode_timing_property(timings, "hfront-porch", &dt->hfront_porch);
  

•   ret |= decode_timing_property(timings, "hactive", &dt->hactive);
  

•   ret |= decode_timing_property(timings, "hsync-len", &dt->hsync_len);
  

•   ret |= decode_timing_property(timings, "vback-porch", &dt->vback_porch);
  

•   ret |= decode_timing_property(timings, "vfront-porch", &dt->vfront_porch);
  

•   ret |= decode_timing_property(timings, "vactive", &dt->vactive);
  

•   ret |= decode_timing_property(timings, "vsync-len", &dt->vsync_len);
  

•   ret |= decode_timing_property(timings, "clock-frequency", &dt->pixelclock);
  

•   dt->flags = 0;
  

•   val = ofnode_read_u32_default(timings, "vsync-active", -1);
  

•   if (val != -1) {
  

if (!ofnode_read_u32(timings, "vsync-active", &val)) {

Please fix below also

•           dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
  

•                           DISPLAY_FLAGS_VSYNC_LOW;
  

•   }
  

•   val = ofnode_read_u32_default(timings, "hsync-active", -1);
  

•   if (val != -1) {
  

•           dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
  

•                           DISPLAY_FLAGS_HSYNC_LOW;
  

•   }
  

•   val = ofnode_read_u32_default(timings, "de-active", -1);
  

•   if (val != -1) {
  

•           dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
  

•                           DISPLAY_FLAGS_DE_LOW;
  

•   }
  

•   val = ofnode_read_u32_default(timings, "pixelclk-active", -1);
  

•   if (val != -1) {
  

•           dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
  

•                           DISPLAY_FLAGS_PIXDATA_NEGEDGE;
  

•   }
  

•   if (ofnode_read_bool(timings, "interlaced"))
  

•           dt->flags |= DISPLAY_FLAGS_INTERLACED;
  

•   if (ofnode_read_bool(timings, "doublescan"))
  

•           dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
  

•   if (ofnode_read_bool(timings, "doubleclk"))
  

•           dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
  

•   return ret;
  

+}

const void *ofnode_get_property(ofnode node, const char *propname, int *lenp) { if (ofnode_is_np(node)) diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h index fa9865602d..3f6b0843c5 100644 --- a/include/dm/ofnode.h +++ b/include/dm/ofnode.h @@ -974,6 +974,18 @@ struct display_timing; int ofnode_decode_display_timing(ofnode node, int index, struct display_timing *config);

+/**

• • ofnode_decode_panel_timing() - decode display timings
• • Decode panel timings from the supplied 'panel-timings' node.
• • @node: 'display-timing' node containing the timing subnodes
• • @config: Place to put timings
• • Return: 0 if OK, -FDT_ERR_NOTFOUND if not found
• */

+int ofnode_decode_panel_timing(ofnode node,

•                          struct display_timing *config);
  

/**

• ofnode_get_property() - get a pointer to the value of a node property

-- 2.17.1

Please add a test to test/dm/ofnode.c

Regards, Simon