drm/nouveau: remove (now obsolete) BIT U table parsing from DRM code (b6e4ad20) · Commits · github.com / kvm-riscv / linux

drivers/gpu/drm/nouveau/core/subdev/devinit/nv50.c

+33 −1

Original line number	Diff line number	Diff line
		@@ -22,6 +22,10 @@
		* Authors: Ben Skeggs
		*/

		#include <subdev/bios.h>
		#include <subdev/bios/dcb.h>
		#include <subdev/bios/disp.h>
		#include <subdev/bios/init.h>
		#include <subdev/devinit.h>
		#include <subdev/vga.h>

		@@ -55,7 +59,12 @@ nv50_devinit_dtor(struct nouveau_object *object)
		static int
		nv50_devinit_init(struct nouveau_object *object)
		{
		struct nouveau_bios *bios = nouveau_bios(object);
		struct nv50_devinit_priv priv = (void )object;
		struct nvbios_outp info;
		struct dcb_output outp;
		u8 ver = 0xff, hdr, cnt, len;
		int ret, i = 0;

		if (!priv->base.post) {
		if (!nv_rdvgac(priv, 0, 0x00) &&
		@@ -65,7 +74,30 @@ nv50_devinit_init(struct nouveau_object *object)
		}
		}

		return nouveau_devinit_init(&priv->base);
		ret = nouveau_devinit_init(&priv->base);
		if (ret)
		return ret;

		/* if we ran the init tables, execute first script pointer for each
		* display table output entry that has a matching dcb entry.
		*/
		while (priv->base.post && ver) {
		u16 data = nvbios_outp_parse(bios, i++, &ver, &hdr, &cnt, &len, &info);
		if (data && dcb_outp_match(bios, info.type, info.mask, &ver, &len, &outp)) {
		struct nvbios_init init = {
		.subdev = nv_subdev(priv),
		.bios = bios,
		.offset = info.script[0],
		.outp = &outp,
		.crtc = -1,
		.execute = 1,
		};

		nvbios_exec(&init);
		}
		};

		return 0;
		}

		static int

drivers/gpu/drm/nouveau/nouveau_bios.c

+1 −206

Original line number	Diff line number	Diff line
		@@ -652,178 +652,6 @@ bios_encoder_match(struct dcb_output *dcb, u32 hash)
		}
		}

		int
		nouveau_bios_run_display_table(struct drm_device *dev, u16 type, int pclk,
		struct dcb_output *dcbent, int crtc)
		{
		/*
		* The display script table is located by the BIT 'U' table.
		*
		* It contains an array of pointers to various tables describing
		* a particular output type. The first 32-bits of the output
		* tables contains similar information to a DCB entry, and is
		* used to decide whether that particular table is suitable for
		* the output you want to access.
		*
		* The "record header length" field here seems to indicate the
		* offset of the first configuration entry in the output tables.
		* This is 10 on most cards I've seen, but 12 has been witnessed
		* on DP cards, and there's another script pointer within the
		* header.
		*
		* offset + 0 ( 8 bits): version
		* offset + 1 ( 8 bits): header length
		* offset + 2 ( 8 bits): record length
		* offset + 3 ( 8 bits): number of records
		* offset + 4 ( 8 bits): record header length
		* offset + 5 (16 bits): pointer to first output script table
		*/

		struct nouveau_drm *drm = nouveau_drm(dev);
		struct nvbios *bios = &drm->vbios;
		uint8_t *table = &bios->data[bios->display.script_table_ptr];
		uint8_t *otable = NULL;
		uint16_t script;
		int i;

		if (!bios->display.script_table_ptr) {
		NV_ERROR(drm, "No pointer to output script table\n");
		return 1;
		}

		/*
		* Nothing useful has been in any of the pre-2.0 tables I've seen,
		* so until they are, we really don't need to care.
		*/
		if (table[0] < 0x20)
		return 1;

		if (table[0] != 0x20 && table[0] != 0x21) {
		NV_ERROR(drm, "Output script table version 0x%02x unknown\n",
		table[0]);
		return 1;
		}

		/*
		* The output script tables describing a particular output type
		* look as follows:
		*
		* offset + 0 (32 bits): output this table matches (hash of DCB)
		* offset + 4 ( 8 bits): unknown
		* offset + 5 ( 8 bits): number of configurations
		* offset + 6 (16 bits): pointer to some script
		* offset + 8 (16 bits): pointer to some script
		*
		* headerlen == 10
		* offset + 10 : configuration 0
		*
		* headerlen == 12
		* offset + 10 : pointer to some script
		* offset + 12 : configuration 0
		*
		* Each config entry is as follows:
		*
		* offset + 0 (16 bits): unknown, assumed to be a match value
		* offset + 2 (16 bits): pointer to script table (clock set?)
		* offset + 4 (16 bits): pointer to script table (reset?)
		*
		* There doesn't appear to be a count value to say how many
		* entries exist in each script table, instead, a 0 value in
		* the first 16-bit word seems to indicate both the end of the
		* list and the default entry. The second 16-bit word in the
		* script tables is a pointer to the script to execute.
		*/

		NV_DEBUG(drm, "Searching for output entry for %d %d %d\n",
		dcbent->type, dcbent->location, dcbent->or);
		for (i = 0; i < table[3]; i++) {
		otable = ROMPTR(dev, table[table[1] + (i * table[2])]);
		if (otable && bios_encoder_match(dcbent, ROM32(otable[0])))
		break;
		}

		if (!otable) {
		NV_DEBUG(drm, "failed to match any output table\n");
		return 1;
		}

		if (pclk < -2 \|\| pclk > 0) {
		/* Try to find matching script table entry */
		for (i = 0; i < otable[5]; i++) {
		if (ROM16(otable[table[4] + i*6]) == type)
		break;
		}

		if (i == otable[5]) {
		NV_ERROR(drm, "Table 0x%04x not found for %d/%d, "
		"using first\n",
		type, dcbent->type, dcbent->or);
		i = 0;
		}
		}

		if (pclk == 0) {
		script = ROM16(otable[6]);
		if (!script) {
		NV_DEBUG(drm, "output script 0 not found\n");
		return 1;
		}

		NV_DEBUG(drm, "0x%04X: parsing output script 0\n", script);
		nouveau_bios_run_init_table(dev, script, dcbent, crtc);
		} else
		if (pclk == -1) {
		script = ROM16(otable[8]);
		if (!script) {
		NV_DEBUG(drm, "output script 1 not found\n");
		return 1;
		}

		NV_DEBUG(drm, "0x%04X: parsing output script 1\n", script);
		nouveau_bios_run_init_table(dev, script, dcbent, crtc);
		} else
		if (pclk == -2) {
		if (table[4] >= 12)
		script = ROM16(otable[10]);
		else
		script = 0;
		if (!script) {
		NV_DEBUG(drm, "output script 2 not found\n");
		return 1;
		}

		NV_DEBUG(drm, "0x%04X: parsing output script 2\n", script);
		nouveau_bios_run_init_table(dev, script, dcbent, crtc);
		} else
		if (pclk > 0) {
		script = ROM16(otable[table[4] + i*6 + 2]);
		if (script)
		script = clkcmptable(bios, script, pclk);
		if (!script) {
		NV_DEBUG(drm, "clock script 0 not found\n");
		return 1;
		}

		NV_DEBUG(drm, "0x%04X: parsing clock script 0\n", script);
		nouveau_bios_run_init_table(dev, script, dcbent, crtc);
		} else
		if (pclk < 0) {
		script = ROM16(otable[table[4] + i*6 + 4]);
		if (script)
		script = clkcmptable(bios, script, -pclk);
		if (!script) {
		NV_DEBUG(drm, "clock script 1 not found\n");
		return 1;
		}

		NV_DEBUG(drm, "0x%04X: parsing clock script 1\n", script);
		nouveau_bios_run_init_table(dev, script, dcbent, crtc);
		}

		return 0;
		}


		int run_tmds_table(struct drm_device dev, struct dcb_output dcbent, int head, int pxclk)
		{
		/*
		@@ -1212,31 +1040,6 @@ static int parse_bit_tmds_tbl_entry(struct drm_device dev, struct nvbios bios,
		return 0;
		}

		static int
		parse_bit_U_tbl_entry(struct drm_device dev, struct nvbios bios,
		struct bit_entry *bitentry)
		{
		/*
		* Parses the pointer to the G80 output script tables
		*
		* Starting at bitentry->offset:
		*
		* offset + 0 (16 bits): output script table pointer
		*/

		struct nouveau_drm *drm = nouveau_drm(dev);
		uint16_t outputscripttableptr;

		if (bitentry->length != 3) {
		NV_ERROR(drm, "Do not understand BIT U table\n");
		return -EINVAL;
		}

		outputscripttableptr = ROM16(bios->data[bitentry->offset]);
		bios->display.script_table_ptr = outputscripttableptr;
		return 0;
		}

		struct bit_table {
		const char id;
		int (* const parse_fn)(struct drm_device , struct nvbios , struct bit_entry *);
		@@ -1313,7 +1116,6 @@ parse_bit_structure(struct nvbios *bios, const uint16_t bitoffset)
		parse_bit_table(bios, bitoffset, &BIT_TABLE('M', M)); /* memory? */
		parse_bit_table(bios, bitoffset, &BIT_TABLE('L', lvds));
		parse_bit_table(bios, bitoffset, &BIT_TABLE('T', tmds));
		parse_bit_table(bios, bitoffset, &BIT_TABLE('U', U));

		return 0;
		}
		@@ -2324,7 +2126,7 @@ nouveau_run_vbios_init(struct drm_device *dev)
		{
		struct nouveau_drm *drm = nouveau_drm(dev);
		struct nvbios *bios = &drm->vbios;
		int i, ret = 0;
		int ret = 0;

		/* Reset the BIOS head to 0. */
		bios->state.crtchead = 0;
		@@ -2337,13 +2139,6 @@ nouveau_run_vbios_init(struct drm_device *dev)
		bios->fp.lvds_init_run = false;
		}

		if (nv_device(drm->device)->card_type >= NV_50) {
		for (i = 0; bios->execute && i < bios->dcb.entries; i++) {
		nouveau_bios_run_display_table(dev, 0, 0,
		&bios->dcb.entry[i], -1);
		}
		}

		return ret;
		}

drivers/gpu/drm/nouveau/nouveau_bios.h

+0 −8

Original line number	Diff line number	Diff line
		@@ -127,12 +127,6 @@ struct nvbios {
		int crtchead;
		} state;

		struct {
		struct dcb_output *output;
		int crtc;
		uint16_t script_table_ptr;
		} display;

		struct {
		uint16_t fptablepointer; /* also used by tmds */
		uint16_t fpxlatetableptr;
		@@ -185,8 +179,6 @@ void nouveau_bios_takedown(struct drm_device *dev);
		int nouveau_run_vbios_init(struct drm_device *);
		struct dcb_connector_table_entry *
		nouveau_bios_connector_entry(struct drm_device *, int index);
		int nouveau_bios_run_display_table(struct drm_device *, u16 id, int clk,
		struct dcb_output *, int crtc);
		bool nouveau_bios_fp_mode(struct drm_device , struct drm_display_mode );
		uint8_t nouveau_bios_embedded_edid(struct drm_device );
		int nouveau_bios_parse_lvds_table(struct drm_device *, int pxclk,